diff options
Diffstat (limited to 'pixman/pixman/pixman-bits-image.c')
-rw-r--r-- | pixman/pixman/pixman-bits-image.c | 3210 |
1 files changed, 1602 insertions, 1608 deletions
diff --git a/pixman/pixman/pixman-bits-image.c b/pixman/pixman/pixman-bits-image.c index a865d719a..88c2f0eea 100644 --- a/pixman/pixman/pixman-bits-image.c +++ b/pixman/pixman/pixman-bits-image.c @@ -1,1608 +1,1602 @@ -/* - * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc. - * 2005 Lars Knoll & Zack Rusin, Trolltech - * 2008 Aaron Plattner, NVIDIA Corporation - * Copyright © 2000 SuSE, Inc. - * Copyright © 2007, 2009 Red Hat, Inc. - * Copyright © 2008 André Tupinambá <andrelrt@gmail.com> - * - * Permission to use, copy, modify, distribute, and sell this software and its - * documentation for any purpose is hereby granted without fee, provided that - * the above copyright notice appear in all copies and that both that - * copyright notice and this permission notice appear in supporting - * documentation, and that the name of Keith Packard not be used in - * advertising or publicity pertaining to distribution of the software without - * specific, written prior permission. Keith Packard makes no - * representations about the suitability of this software for any purpose. It - * is provided "as is" without express or implied warranty. - * - * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS - * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND - * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY - * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN - * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING - * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS - * SOFTWARE. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "pixman-private.h" -#include "pixman-combine32.h" - -/* - * By default, just evaluate the image at 32bpp and expand. Individual image - * types can plug in a better scanline getter if they want to. For example - * we could produce smoother gradients by evaluating them at higher color - * depth, but that's a project for the future. - */ -static void -_pixman_image_get_scanline_generic_64 (pixman_image_t * image, - int x, - int y, - int width, - uint32_t * buffer, - const uint32_t * mask) -{ - uint32_t *mask8 = NULL; - - /* Contract the mask image, if one exists, so that the 32-bit fetch - * function can use it. - */ - if (mask) - { - mask8 = pixman_malloc_ab (width, sizeof(uint32_t)); - if (!mask8) - return; - - pixman_contract (mask8, (uint64_t *)mask, width); - } - - /* Fetch the source image into the first half of buffer. */ - image->bits.get_scanline_32 (image, x, y, width, (uint32_t*)buffer, mask8); - - /* Expand from 32bpp to 64bpp in place. */ - pixman_expand ((uint64_t *)buffer, buffer, PIXMAN_a8r8g8b8, width); - - free (mask8); -} - -/* Fetch functions */ - -static force_inline uint32_t -fetch_pixel_no_alpha (bits_image_t *image, - int x, int y, pixman_bool_t check_bounds) -{ - if (check_bounds && - (x < 0 || x >= image->width || y < 0 || y >= image->height)) - { - return 0; - } - - return image->fetch_pixel_32 (image, x, y); -} - -typedef uint32_t (* get_pixel_t) (bits_image_t *image, - int x, int y, pixman_bool_t check_bounds); - -static force_inline void -repeat (pixman_repeat_t repeat, int size, int *coord) -{ - switch (repeat) - { - case PIXMAN_REPEAT_NORMAL: - *coord = MOD (*coord, size); - break; - - case PIXMAN_REPEAT_PAD: - *coord = CLIP (*coord, 0, size - 1); - break; - - case PIXMAN_REPEAT_REFLECT: - *coord = MOD (*coord, size * 2); - - if (*coord >= size) - *coord = size * 2 - *coord - 1; - break; - - case PIXMAN_REPEAT_NONE: - break; - - default: - break; - } -} - -static force_inline uint32_t -bits_image_fetch_pixel_nearest (bits_image_t *image, - pixman_fixed_t x, - pixman_fixed_t y, - get_pixel_t get_pixel) -{ - int x0 = pixman_fixed_to_int (x - pixman_fixed_e); - int y0 = pixman_fixed_to_int (y - pixman_fixed_e); - - if (image->common.repeat != PIXMAN_REPEAT_NONE) - { - repeat (image->common.repeat, image->width, &x0); - repeat (image->common.repeat, image->height, &y0); - - return get_pixel (image, x0, y0, FALSE); - } - else - { - return get_pixel (image, x0, y0, TRUE); - } -} - -#if SIZEOF_LONG > 4 - -static force_inline uint32_t -bilinear_interpolation (uint32_t tl, uint32_t tr, - uint32_t bl, uint32_t br, - int distx, int disty) -{ - uint64_t distxy, distxiy, distixy, distixiy; - uint64_t tl64, tr64, bl64, br64; - uint64_t f, r; - - distxy = distx * disty; - distxiy = distx * (256 - disty); - distixy = (256 - distx) * disty; - distixiy = (256 - distx) * (256 - disty); - - /* Alpha and Blue */ - tl64 = tl & 0xff0000ff; - tr64 = tr & 0xff0000ff; - bl64 = bl & 0xff0000ff; - br64 = br & 0xff0000ff; - - f = tl64 * distixiy + tr64 * distxiy + bl64 * distixy + br64 * distxy; - r = f & 0x0000ff0000ff0000ull; - - /* Red and Green */ - tl64 = tl; - tl64 = ((tl64 << 16) & 0x000000ff00000000ull) | (tl64 & 0x0000ff00ull); - - tr64 = tr; - tr64 = ((tr64 << 16) & 0x000000ff00000000ull) | (tr64 & 0x0000ff00ull); - - bl64 = bl; - bl64 = ((bl64 << 16) & 0x000000ff00000000ull) | (bl64 & 0x0000ff00ull); - - br64 = br; - br64 = ((br64 << 16) & 0x000000ff00000000ull) | (br64 & 0x0000ff00ull); - - f = tl64 * distixiy + tr64 * distxiy + bl64 * distixy + br64 * distxy; - r |= ((f >> 16) & 0x000000ff00000000ull) | (f & 0xff000000ull); - - return (uint32_t)(r >> 16); -} - -#else - -static force_inline uint32_t -bilinear_interpolation (uint32_t tl, uint32_t tr, - uint32_t bl, uint32_t br, - int distx, int disty) -{ - int distxy, distxiy, distixy, distixiy; - uint32_t f, r; - - distxy = distx * disty; - distxiy = (distx << 8) - distxy; /* distx * (256 - disty) */ - distixy = (disty << 8) - distxy; /* disty * (256 - distx) */ - distixiy = - 256 * 256 - (disty << 8) - - (distx << 8) + distxy; /* (256 - distx) * (256 - disty) */ - - /* Blue */ - r = (tl & 0x000000ff) * distixiy + (tr & 0x000000ff) * distxiy - + (bl & 0x000000ff) * distixy + (br & 0x000000ff) * distxy; - - /* Green */ - f = (tl & 0x0000ff00) * distixiy + (tr & 0x0000ff00) * distxiy - + (bl & 0x0000ff00) * distixy + (br & 0x0000ff00) * distxy; - r |= f & 0xff000000; - - tl >>= 16; - tr >>= 16; - bl >>= 16; - br >>= 16; - r >>= 16; - - /* Red */ - f = (tl & 0x000000ff) * distixiy + (tr & 0x000000ff) * distxiy - + (bl & 0x000000ff) * distixy + (br & 0x000000ff) * distxy; - r |= f & 0x00ff0000; - - /* Alpha */ - f = (tl & 0x0000ff00) * distixiy + (tr & 0x0000ff00) * distxiy - + (bl & 0x0000ff00) * distixy + (br & 0x0000ff00) * distxy; - r |= f & 0xff000000; - - return r; -} - -#endif - -static force_inline uint32_t -bits_image_fetch_pixel_bilinear (bits_image_t *image, - pixman_fixed_t x, - pixman_fixed_t y, - get_pixel_t get_pixel) -{ - pixman_repeat_t repeat_mode = image->common.repeat; - int width = image->width; - int height = image->height; - int x1, y1, x2, y2; - uint32_t tl, tr, bl, br; - int32_t distx, disty; - - x1 = x - pixman_fixed_1 / 2; - y1 = y - pixman_fixed_1 / 2; - - distx = (x1 >> 8) & 0xff; - disty = (y1 >> 8) & 0xff; - - x1 = pixman_fixed_to_int (x1); - y1 = pixman_fixed_to_int (y1); - x2 = x1 + 1; - y2 = y1 + 1; - - if (repeat_mode != PIXMAN_REPEAT_NONE) - { - repeat (repeat_mode, width, &x1); - repeat (repeat_mode, height, &y1); - repeat (repeat_mode, width, &x2); - repeat (repeat_mode, height, &y2); - - tl = get_pixel (image, x1, y1, FALSE); - bl = get_pixel (image, x1, y2, FALSE); - tr = get_pixel (image, x2, y1, FALSE); - br = get_pixel (image, x2, y2, FALSE); - } - else - { - tl = get_pixel (image, x1, y1, TRUE); - tr = get_pixel (image, x2, y1, TRUE); - bl = get_pixel (image, x1, y2, TRUE); - br = get_pixel (image, x2, y2, TRUE); - } - - return bilinear_interpolation (tl, tr, bl, br, distx, disty); -} - -static void -bits_image_fetch_bilinear_no_repeat_8888 (pixman_image_t * ima, - int offset, - int line, - int width, - uint32_t * buffer, - const uint32_t * mask) -{ - bits_image_t *bits = &ima->bits; - pixman_fixed_t x_top, x_bottom, x; - pixman_fixed_t ux_top, ux_bottom, ux; - pixman_vector_t v; - uint32_t top_mask, bottom_mask; - uint32_t *top_row; - uint32_t *bottom_row; - uint32_t *end; - uint32_t zero[2] = { 0, 0 }; - uint32_t one = 1; - int y, y1, y2; - int disty; - int mask_inc; - int w; - - /* reference point is the center of the pixel */ - v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; - v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; - v.vector[2] = pixman_fixed_1; - - if (!pixman_transform_point_3d (bits->common.transform, &v)) - return; - - ux = ux_top = ux_bottom = bits->common.transform->matrix[0][0]; - x = x_top = x_bottom = v.vector[0] - pixman_fixed_1/2; - - y = v.vector[1] - pixman_fixed_1/2; - disty = (y >> 8) & 0xff; - - /* Load the pointers to the first and second lines from the source - * image that bilinear code must read. - * - * The main trick in this code is about the check if any line are - * outside of the image; - * - * When I realize that a line (any one) is outside, I change - * the pointer to a dummy area with zeros. Once I change this, I - * must be sure the pointer will not change, so I set the - * variables to each pointer increments inside the loop. - */ - y1 = pixman_fixed_to_int (y); - y2 = y1 + 1; - - if (y1 < 0 || y1 >= bits->height) - { - top_row = zero; - x_top = 0; - ux_top = 0; - } - else - { - top_row = bits->bits + y1 * bits->rowstride; - x_top = x; - ux_top = ux; - } - - if (y2 < 0 || y2 >= bits->height) - { - bottom_row = zero; - x_bottom = 0; - ux_bottom = 0; - } - else - { - bottom_row = bits->bits + y2 * bits->rowstride; - x_bottom = x; - ux_bottom = ux; - } - - /* Instead of checking whether the operation uses the mast in - * each loop iteration, verify this only once and prepare the - * variables to make the code smaller inside the loop. - */ - if (!mask) - { - mask_inc = 0; - mask = &one; - } - else - { - /* If have a mask, prepare the variables to check it */ - mask_inc = 1; - } - - /* If both are zero, then the whole thing is zero */ - if (top_row == zero && bottom_row == zero) - { - memset (buffer, 0, width * sizeof (uint32_t)); - return; - } - else if (bits->format == PIXMAN_x8r8g8b8) - { - if (top_row == zero) - { - top_mask = 0; - bottom_mask = 0xff000000; - } - else if (bottom_row == zero) - { - top_mask = 0xff000000; - bottom_mask = 0; - } - else - { - top_mask = 0xff000000; - bottom_mask = 0xff000000; - } - } - else - { - top_mask = 0; - bottom_mask = 0; - } - - end = buffer + width; - - /* Zero fill to the left of the image */ - while (buffer < end && x < pixman_fixed_minus_1) - { - *buffer++ = 0; - x += ux; - x_top += ux_top; - x_bottom += ux_bottom; - mask += mask_inc; - } - - /* Left edge - */ - while (buffer < end && x < 0) - { - uint32_t tr, br; - int32_t distx; - - tr = top_row[pixman_fixed_to_int (x_top) + 1] | top_mask; - br = bottom_row[pixman_fixed_to_int (x_bottom) + 1] | bottom_mask; - - distx = (x >> 8) & 0xff; - - *buffer++ = bilinear_interpolation (0, tr, 0, br, distx, disty); - - x += ux; - x_top += ux_top; - x_bottom += ux_bottom; - mask += mask_inc; - } - - /* Main part */ - w = pixman_int_to_fixed (bits->width - 1); - - while (buffer < end && x < w) - { - if (*mask) - { - uint32_t tl, tr, bl, br; - int32_t distx; - - tl = top_row [pixman_fixed_to_int (x_top)] | top_mask; - tr = top_row [pixman_fixed_to_int (x_top) + 1] | top_mask; - bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask; - br = bottom_row [pixman_fixed_to_int (x_bottom) + 1] | bottom_mask; - - distx = (x >> 8) & 0xff; - - *buffer = bilinear_interpolation (tl, tr, bl, br, distx, disty); - } - - buffer++; - x += ux; - x_top += ux_top; - x_bottom += ux_bottom; - mask += mask_inc; - } - - /* Right Edge */ - w = pixman_int_to_fixed (bits->width); - while (buffer < end && x < w) - { - if (*mask) - { - uint32_t tl, bl; - int32_t distx; - - tl = top_row [pixman_fixed_to_int (x_top)] | top_mask; - bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask; - - distx = (x >> 8) & 0xff; - - *buffer = bilinear_interpolation (tl, 0, bl, 0, distx, disty); - } - - buffer++; - x += ux; - x_top += ux_top; - x_bottom += ux_bottom; - mask += mask_inc; - } - - /* Zero fill to the left of the image */ - while (buffer < end) - *buffer++ = 0; -} - -static force_inline uint32_t -bits_image_fetch_pixel_convolution (bits_image_t *image, - pixman_fixed_t x, - pixman_fixed_t y, - get_pixel_t get_pixel) -{ - pixman_fixed_t *params = image->common.filter_params; - int x_off = (params[0] - pixman_fixed_1) >> 1; - int y_off = (params[1] - pixman_fixed_1) >> 1; - int32_t cwidth = pixman_fixed_to_int (params[0]); - int32_t cheight = pixman_fixed_to_int (params[1]); - int32_t srtot, sgtot, sbtot, satot; - int32_t i, j, x1, x2, y1, y2; - pixman_repeat_t repeat_mode = image->common.repeat; - int width = image->width; - int height = image->height; - - params += 2; - - x1 = pixman_fixed_to_int (x - pixman_fixed_e - x_off); - y1 = pixman_fixed_to_int (y - pixman_fixed_e - y_off); - x2 = x1 + cwidth; - y2 = y1 + cheight; - - srtot = sgtot = sbtot = satot = 0; - - for (i = y1; i < y2; ++i) - { - for (j = x1; j < x2; ++j) - { - int rx = j; - int ry = i; - - pixman_fixed_t f = *params; - - if (f) - { - uint32_t pixel; - - if (repeat_mode != PIXMAN_REPEAT_NONE) - { - repeat (repeat_mode, width, &rx); - repeat (repeat_mode, height, &ry); - - pixel = get_pixel (image, rx, ry, FALSE); - } - else - { - pixel = get_pixel (image, rx, ry, TRUE); - } - - srtot += RED_8 (pixel) * f; - sgtot += GREEN_8 (pixel) * f; - sbtot += BLUE_8 (pixel) * f; - satot += ALPHA_8 (pixel) * f; - } - - params++; - } - } - - satot >>= 16; - srtot >>= 16; - sgtot >>= 16; - sbtot >>= 16; - - satot = CLIP (satot, 0, 0xff); - srtot = CLIP (srtot, 0, 0xff); - sgtot = CLIP (sgtot, 0, 0xff); - sbtot = CLIP (sbtot, 0, 0xff); - - return ((satot << 24) | (srtot << 16) | (sgtot << 8) | (sbtot)); -} - -static force_inline uint32_t -bits_image_fetch_pixel_filtered (bits_image_t *image, - pixman_fixed_t x, - pixman_fixed_t y, - get_pixel_t get_pixel) -{ - switch (image->common.filter) - { - case PIXMAN_FILTER_NEAREST: - case PIXMAN_FILTER_FAST: - return bits_image_fetch_pixel_nearest (image, x, y, get_pixel); - break; - - case PIXMAN_FILTER_BILINEAR: - case PIXMAN_FILTER_GOOD: - case PIXMAN_FILTER_BEST: - return bits_image_fetch_pixel_bilinear (image, x, y, get_pixel); - break; - - case PIXMAN_FILTER_CONVOLUTION: - return bits_image_fetch_pixel_convolution (image, x, y, get_pixel); - break; - - default: - break; - } - - return 0; -} - -static void -bits_image_fetch_affine_no_alpha (pixman_image_t * image, - int offset, - int line, - int width, - uint32_t * buffer, - const uint32_t * mask) -{ - pixman_fixed_t x, y; - pixman_fixed_t ux, uy; - pixman_vector_t v; - int i; - - /* reference point is the center of the pixel */ - v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; - v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; - v.vector[2] = pixman_fixed_1; - - if (image->common.transform) - { - if (!pixman_transform_point_3d (image->common.transform, &v)) - return; - - ux = image->common.transform->matrix[0][0]; - uy = image->common.transform->matrix[1][0]; - } - else - { - ux = pixman_fixed_1; - uy = 0; - } - - x = v.vector[0]; - y = v.vector[1]; - - for (i = 0; i < width; ++i) - { - if (!mask || mask[i]) - { - buffer[i] = bits_image_fetch_pixel_filtered ( - &image->bits, x, y, fetch_pixel_no_alpha); - } - - x += ux; - y += uy; - } -} - -/* General fetcher */ -static force_inline uint32_t -fetch_pixel_general (bits_image_t *image, int x, int y, pixman_bool_t check_bounds) -{ - uint32_t pixel; - - if (check_bounds && - (x < 0 || x >= image->width || y < 0 || y >= image->height)) - { - return 0; - } - - pixel = image->fetch_pixel_32 (image, x, y); - - if (image->common.alpha_map) - { - uint32_t pixel_a; - - x -= image->common.alpha_origin_x; - y -= image->common.alpha_origin_y; - - if (x < 0 || x >= image->common.alpha_map->width || - y < 0 || y >= image->common.alpha_map->height) - { - pixel_a = 0; - } - else - { - pixel_a = image->common.alpha_map->fetch_pixel_32 ( - image->common.alpha_map, x, y); - - pixel_a = ALPHA_8 (pixel_a); - } - - pixel &= 0x00ffffff; - pixel |= (pixel_a << 24); - } - - return pixel; -} - -static void -bits_image_fetch_general (pixman_image_t * image, - int offset, - int line, - int width, - uint32_t * buffer, - const uint32_t * mask) -{ - pixman_fixed_t x, y, w; - pixman_fixed_t ux, uy, uw; - pixman_vector_t v; - int i; - - /* reference point is the center of the pixel */ - v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; - v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; - v.vector[2] = pixman_fixed_1; - - if (image->common.transform) - { - if (!pixman_transform_point_3d (image->common.transform, &v)) - return; - - ux = image->common.transform->matrix[0][0]; - uy = image->common.transform->matrix[1][0]; - uw = image->common.transform->matrix[2][0]; - } - else - { - ux = pixman_fixed_1; - uy = 0; - uw = 0; - } - - x = v.vector[0]; - y = v.vector[1]; - w = v.vector[2]; - - for (i = 0; i < width; ++i) - { - pixman_fixed_t x0, y0; - - if (!mask || mask[i]) - { - if (w != 0) - { - x0 = ((pixman_fixed_48_16_t)x << 16) / w; - y0 = ((pixman_fixed_48_16_t)y << 16) / w; - } - else - { - x0 = 0; - y0 = 0; - } - - buffer[i] = bits_image_fetch_pixel_filtered ( - &image->bits, x0, y0, fetch_pixel_general); - } - - x += ux; - y += uy; - w += uw; - } -} - -static const uint8_t zero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; - -typedef uint32_t (* convert_pixel_t) (const uint8_t *row, int x); - -static force_inline void -bits_image_fetch_bilinear_affine (pixman_image_t * image, - int offset, - int line, - int width, - uint32_t * buffer, - const uint32_t * mask, - - convert_pixel_t convert_pixel, - pixman_format_code_t format, - pixman_repeat_t repeat_mode) -{ - pixman_fixed_t x, y; - pixman_fixed_t ux, uy; - pixman_vector_t v; - bits_image_t *bits = &image->bits; - int i; - - /* reference point is the center of the pixel */ - v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; - v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; - v.vector[2] = pixman_fixed_1; - - if (!pixman_transform_point_3d (image->common.transform, &v)) - return; - - ux = image->common.transform->matrix[0][0]; - uy = image->common.transform->matrix[1][0]; - - x = v.vector[0]; - y = v.vector[1]; - - for (i = 0; i < width; ++i) - { - int x1, y1, x2, y2; - uint32_t tl, tr, bl, br; - int32_t distx, disty; - int width = image->bits.width; - int height = image->bits.height; - const uint8_t *row1; - const uint8_t *row2; - - if (mask && !mask[i]) - goto next; - - x1 = x - pixman_fixed_1 / 2; - y1 = y - pixman_fixed_1 / 2; - - distx = (x1 >> 8) & 0xff; - disty = (y1 >> 8) & 0xff; - - y1 = pixman_fixed_to_int (y1); - y2 = y1 + 1; - x1 = pixman_fixed_to_int (x1); - x2 = x1 + 1; - - if (repeat_mode != PIXMAN_REPEAT_NONE) - { - uint32_t mask; - - mask = PIXMAN_FORMAT_A (format)? 0 : 0xff000000; - - repeat (repeat_mode, width, &x1); - repeat (repeat_mode, height, &y1); - repeat (repeat_mode, width, &x2); - repeat (repeat_mode, height, &y2); - - row1 = (uint8_t *)bits->bits + bits->rowstride * 4 * y1; - row2 = (uint8_t *)bits->bits + bits->rowstride * 4 * y2; - - tl = convert_pixel (row1, x1) | mask; - tr = convert_pixel (row1, x2) | mask; - bl = convert_pixel (row2, x1) | mask; - br = convert_pixel (row2, x2) | mask; - } - else - { - uint32_t mask1, mask2; - int bpp; - - /* Note: PIXMAN_FORMAT_BPP() returns an unsigned value, - * which means if you use it in expressions, those - * expressions become unsigned themselves. Since - * the variables below can be negative in some cases, - * that will lead to crashes on 64 bit architectures. - * - * So this line makes sure bpp is signed - */ - bpp = PIXMAN_FORMAT_BPP (format); - - if (x1 >= width || x2 < 0 || y1 >= height || y2 < 0) - { - buffer[i] = 0; - goto next; - } - - if (y2 == 0) - { - row1 = zero; - mask1 = 0; - } - else - { - row1 = (uint8_t *)bits->bits + bits->rowstride * 4 * y1; - row1 += bpp / 8 * x1; - - mask1 = PIXMAN_FORMAT_A (format)? 0 : 0xff000000; - } - - if (y1 == height - 1) - { - row2 = zero; - mask2 = 0; - } - else - { - row2 = (uint8_t *)bits->bits + bits->rowstride * 4 * y2; - row2 += bpp / 8 * x1; - - mask2 = PIXMAN_FORMAT_A (format)? 0 : 0xff000000; - } - - if (x2 == 0) - { - tl = 0; - bl = 0; - } - else - { - tl = convert_pixel (row1, 0) | mask1; - bl = convert_pixel (row2, 0) | mask2; - } - - if (x1 == width - 1) - { - tr = 0; - br = 0; - } - else - { - tr = convert_pixel (row1, 1) | mask1; - br = convert_pixel (row2, 1) | mask2; - } - } - - buffer[i] = bilinear_interpolation ( - tl, tr, bl, br, distx, disty); - - next: - x += ux; - y += uy; - } -} - -static force_inline void -bits_image_fetch_nearest_affine (pixman_image_t * image, - int offset, - int line, - int width, - uint32_t * buffer, - const uint32_t * mask, - - convert_pixel_t convert_pixel, - pixman_format_code_t format, - pixman_repeat_t repeat_mode) -{ - pixman_fixed_t x, y; - pixman_fixed_t ux, uy; - pixman_vector_t v; - bits_image_t *bits = &image->bits; - int i; - - /* reference point is the center of the pixel */ - v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2; - v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2; - v.vector[2] = pixman_fixed_1; - - if (!pixman_transform_point_3d (image->common.transform, &v)) - return; - - ux = image->common.transform->matrix[0][0]; - uy = image->common.transform->matrix[1][0]; - - x = v.vector[0]; - y = v.vector[1]; - - for (i = 0; i < width; ++i) - { - int width, height, x0, y0; - const uint8_t *row; - - if (mask && !mask[i]) - goto next; - - width = image->bits.width; - height = image->bits.height; - x0 = pixman_fixed_to_int (x - pixman_fixed_e); - y0 = pixman_fixed_to_int (y - pixman_fixed_e); - - if (repeat_mode == PIXMAN_REPEAT_NONE && - (y0 < 0 || y0 >= height || x0 < 0 || x0 >= width)) - { - buffer[i] = 0; - } - else - { - uint32_t mask = PIXMAN_FORMAT_A (format)? 0 : 0xff000000; - - if (repeat_mode != PIXMAN_REPEAT_NONE) - { - repeat (repeat_mode, width, &x0); - repeat (repeat_mode, height, &y0); - } - - row = (uint8_t *)bits->bits + bits->rowstride * 4 * y0; - - buffer[i] = convert_pixel (row, x0) | mask; - } - - next: - x += ux; - y += uy; - } -} - -static force_inline uint32_t -convert_a8r8g8b8 (const uint8_t *row, int x) -{ - return *(((uint32_t *)row) + x); -} - -static force_inline uint32_t -convert_x8r8g8b8 (const uint8_t *row, int x) -{ - return *(((uint32_t *)row) + x); -} - -static force_inline uint32_t -convert_a8 (const uint8_t *row, int x) -{ - return *(row + x) << 24; -} - -static force_inline uint32_t -convert_r5g6b5 (const uint8_t *row, int x) -{ - return CONVERT_0565_TO_0888 (*((uint16_t *)row + x)); -} - -#define MAKE_BILINEAR_FETCHER(name, format, repeat_mode) \ - static void \ - bits_image_fetch_bilinear_affine_ ## name (pixman_image_t *image, \ - int offset, \ - int line, \ - int width, \ - uint32_t * buffer, \ - const uint32_t * mask) \ - { \ - bits_image_fetch_bilinear_affine (image, offset, line, \ - width, buffer, mask, \ - convert_ ## format, \ - PIXMAN_ ## format, \ - repeat_mode); \ - } - -#define MAKE_NEAREST_FETCHER(name, format, repeat_mode) \ - static void \ - bits_image_fetch_nearest_affine_ ## name (pixman_image_t *image, \ - int offset, \ - int line, \ - int width, \ - uint32_t * buffer, \ - const uint32_t * mask) \ - { \ - bits_image_fetch_nearest_affine (image, offset, line, \ - width, buffer, mask, \ - convert_ ## format, \ - PIXMAN_ ## format, \ - repeat_mode); \ - } - -#define MAKE_FETCHERS(name, format, repeat_mode) \ - MAKE_NEAREST_FETCHER (name, format, repeat_mode) \ - MAKE_BILINEAR_FETCHER (name, format, repeat_mode) - -MAKE_FETCHERS (pad_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_PAD) -MAKE_FETCHERS (none_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_NONE) -MAKE_FETCHERS (reflect_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_REFLECT) -MAKE_FETCHERS (normal_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_NORMAL) -MAKE_FETCHERS (pad_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_PAD) -MAKE_FETCHERS (none_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_NONE) -MAKE_FETCHERS (reflect_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_REFLECT) -MAKE_FETCHERS (normal_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_NORMAL) -MAKE_FETCHERS (pad_a8, a8, PIXMAN_REPEAT_PAD) -MAKE_FETCHERS (none_a8, a8, PIXMAN_REPEAT_NONE) -MAKE_FETCHERS (reflect_a8, a8, PIXMAN_REPEAT_REFLECT) -MAKE_FETCHERS (normal_a8, a8, PIXMAN_REPEAT_NORMAL) -MAKE_FETCHERS (pad_r5g6b5, r5g6b5, PIXMAN_REPEAT_PAD) -MAKE_FETCHERS (none_r5g6b5, r5g6b5, PIXMAN_REPEAT_NONE) -MAKE_FETCHERS (reflect_r5g6b5, r5g6b5, PIXMAN_REPEAT_REFLECT) -MAKE_FETCHERS (normal_r5g6b5, r5g6b5, PIXMAN_REPEAT_NORMAL) - -static void -bits_image_fetch_solid_32 (pixman_image_t * image, - int x, - int y, - int width, - uint32_t * buffer, - const uint32_t * mask) -{ - uint32_t color; - uint32_t *end; - - color = image->bits.fetch_pixel_32 (&image->bits, 0, 0); - - end = buffer + width; - while (buffer < end) - *(buffer++) = color; -} - -static void -bits_image_fetch_solid_64 (pixman_image_t * image, - int x, - int y, - int width, - uint32_t * b, - const uint32_t * unused) -{ - uint64_t color; - uint64_t *buffer = (uint64_t *)b; - uint64_t *end; - - color = image->bits.fetch_pixel_64 (&image->bits, 0, 0); - - end = buffer + width; - while (buffer < end) - *(buffer++) = color; -} - -static void -bits_image_fetch_untransformed_repeat_none (bits_image_t *image, - pixman_bool_t wide, - int x, - int y, - int width, - uint32_t * buffer) -{ - uint32_t w; - - if (y < 0 || y >= image->height) - { - memset (buffer, 0, width * (wide? 8 : 4)); - return; - } - - if (x < 0) - { - w = MIN (width, -x); - - memset (buffer, 0, w * (wide ? 8 : 4)); - - width -= w; - buffer += w * (wide? 2 : 1); - x += w; - } - - if (x < image->width) - { - w = MIN (width, image->width - x); - - if (wide) - image->fetch_scanline_64 ((pixman_image_t *)image, x, y, w, buffer, NULL); - else - image->fetch_scanline_32 ((pixman_image_t *)image, x, y, w, buffer, NULL); - - width -= w; - buffer += w * (wide? 2 : 1); - x += w; - } - - memset (buffer, 0, width * (wide ? 8 : 4)); -} - -static void -bits_image_fetch_untransformed_repeat_normal (bits_image_t *image, - pixman_bool_t wide, - int x, - int y, - int width, - uint32_t * buffer) -{ - uint32_t w; - - while (y < 0) - y += image->height; - - while (y >= image->height) - y -= image->height; - - while (width) - { - while (x < 0) - x += image->width; - while (x >= image->width) - x -= image->width; - - w = MIN (width, image->width - x); - - if (wide) - image->fetch_scanline_64 ((pixman_image_t *)image, x, y, w, buffer, NULL); - else - image->fetch_scanline_32 ((pixman_image_t *)image, x, y, w, buffer, NULL); - - buffer += w * (wide? 2 : 1); - x += w; - width -= w; - } -} - -static void -bits_image_fetch_untransformed_32 (pixman_image_t * image, - int x, - int y, - int width, - uint32_t * buffer, - const uint32_t * mask) -{ - if (image->common.repeat == PIXMAN_REPEAT_NONE) - { - bits_image_fetch_untransformed_repeat_none ( - &image->bits, FALSE, x, y, width, buffer); - } - else - { - bits_image_fetch_untransformed_repeat_normal ( - &image->bits, FALSE, x, y, width, buffer); - } -} - -static void -bits_image_fetch_untransformed_64 (pixman_image_t * image, - int x, - int y, - int width, - uint32_t * buffer, - const uint32_t * unused) -{ - if (image->common.repeat == PIXMAN_REPEAT_NONE) - { - bits_image_fetch_untransformed_repeat_none ( - &image->bits, TRUE, x, y, width, buffer); - } - else - { - bits_image_fetch_untransformed_repeat_normal ( - &image->bits, TRUE, x, y, width, buffer); - } -} - -typedef struct -{ - pixman_format_code_t format; - uint32_t flags; - fetch_scanline_t fetch_32; - fetch_scanline_t fetch_64; -} fetcher_info_t; - -static const fetcher_info_t fetcher_info[] = -{ - { PIXMAN_solid, - FAST_PATH_NO_ALPHA_MAP, - bits_image_fetch_solid_32, - bits_image_fetch_solid_64 - }, - - { PIXMAN_any, - (FAST_PATH_NO_ALPHA_MAP | - FAST_PATH_ID_TRANSFORM | - FAST_PATH_NO_CONVOLUTION_FILTER | - FAST_PATH_NO_PAD_REPEAT | - FAST_PATH_NO_REFLECT_REPEAT), - bits_image_fetch_untransformed_32, - bits_image_fetch_untransformed_64 - }, - -#define FAST_BILINEAR_FLAGS \ - (FAST_PATH_NO_ALPHA_MAP | \ - FAST_PATH_NO_ACCESSORS | \ - FAST_PATH_HAS_TRANSFORM | \ - FAST_PATH_AFFINE_TRANSFORM | \ - FAST_PATH_X_UNIT_POSITIVE | \ - FAST_PATH_Y_UNIT_ZERO | \ - FAST_PATH_NONE_REPEAT | \ - FAST_PATH_BILINEAR_FILTER) - - { PIXMAN_a8r8g8b8, - FAST_BILINEAR_FLAGS, - bits_image_fetch_bilinear_no_repeat_8888, - _pixman_image_get_scanline_generic_64 - }, - - { PIXMAN_x8r8g8b8, - FAST_BILINEAR_FLAGS, - bits_image_fetch_bilinear_no_repeat_8888, - _pixman_image_get_scanline_generic_64 - }, - -#define GENERAL_BILINEAR_FLAGS \ - (FAST_PATH_NO_ALPHA_MAP | \ - FAST_PATH_NO_ACCESSORS | \ - FAST_PATH_HAS_TRANSFORM | \ - FAST_PATH_AFFINE_TRANSFORM | \ - FAST_PATH_BILINEAR_FILTER) - -#define GENERAL_NEAREST_FLAGS \ - (FAST_PATH_NO_ALPHA_MAP | \ - FAST_PATH_NO_ACCESSORS | \ - FAST_PATH_HAS_TRANSFORM | \ - FAST_PATH_AFFINE_TRANSFORM | \ - FAST_PATH_NEAREST_FILTER) - -#define BILINEAR_AFFINE_FAST_PATH(name, format, repeat) \ - { PIXMAN_ ## format, \ - GENERAL_BILINEAR_FLAGS | FAST_PATH_ ## repeat ## _REPEAT, \ - bits_image_fetch_bilinear_affine_ ## name, \ - _pixman_image_get_scanline_generic_64 \ - }, - -#define NEAREST_AFFINE_FAST_PATH(name, format, repeat) \ - { PIXMAN_ ## format, \ - GENERAL_NEAREST_FLAGS | FAST_PATH_ ## repeat ## _REPEAT, \ - bits_image_fetch_nearest_affine_ ## name, \ - _pixman_image_get_scanline_generic_64 \ - }, - -#define AFFINE_FAST_PATHS(name, format, repeat) \ - BILINEAR_AFFINE_FAST_PATH(name, format, repeat) \ - NEAREST_AFFINE_FAST_PATH(name, format, repeat) - - AFFINE_FAST_PATHS (pad_a8r8g8b8, a8r8g8b8, PAD) - AFFINE_FAST_PATHS (none_a8r8g8b8, a8r8g8b8, NONE) - AFFINE_FAST_PATHS (reflect_a8r8g8b8, a8r8g8b8, REFLECT) - AFFINE_FAST_PATHS (normal_a8r8g8b8, a8r8g8b8, NORMAL) - AFFINE_FAST_PATHS (pad_x8r8g8b8, x8r8g8b8, PAD) - AFFINE_FAST_PATHS (none_x8r8g8b8, x8r8g8b8, NONE) - AFFINE_FAST_PATHS (reflect_x8r8g8b8, x8r8g8b8, REFLECT) - AFFINE_FAST_PATHS (normal_x8r8g8b8, x8r8g8b8, NORMAL) - AFFINE_FAST_PATHS (pad_a8, a8, PAD) - AFFINE_FAST_PATHS (none_a8, a8, NONE) - AFFINE_FAST_PATHS (reflect_a8, a8, REFLECT) - AFFINE_FAST_PATHS (normal_a8, a8, NORMAL) - AFFINE_FAST_PATHS (pad_r5g6b5, r5g6b5, PAD) - AFFINE_FAST_PATHS (none_r5g6b5, r5g6b5, NONE) - AFFINE_FAST_PATHS (reflect_r5g6b5, r5g6b5, REFLECT) - AFFINE_FAST_PATHS (normal_r5g6b5, r5g6b5, NORMAL) - - /* Affine, no alpha */ - { PIXMAN_any, - (FAST_PATH_NO_ALPHA_MAP | FAST_PATH_HAS_TRANSFORM | FAST_PATH_AFFINE_TRANSFORM), - bits_image_fetch_affine_no_alpha, - _pixman_image_get_scanline_generic_64 - }, - - /* General */ - { PIXMAN_any, 0, bits_image_fetch_general, _pixman_image_get_scanline_generic_64 }, - - { PIXMAN_null }, -}; - -static void -bits_image_property_changed (pixman_image_t *image) -{ - uint32_t flags = image->common.flags; - pixman_format_code_t format = image->common.extended_format_code; - const fetcher_info_t *info; - - _pixman_bits_image_setup_accessors (&image->bits); - - info = fetcher_info; - while (info->format != PIXMAN_null) - { - if ((info->format == format || info->format == PIXMAN_any) && - (info->flags & flags) == info->flags) - { - image->bits.get_scanline_32 = info->fetch_32; - image->bits.get_scanline_64 = info->fetch_64; - break; - } - - info++; - } -} - -static uint32_t * -src_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask) -{ - iter->image->bits.get_scanline_32 ( - iter->image, iter->x, iter->y++, iter->width, iter->buffer, mask); - - return iter->buffer; -} - -static uint32_t * -src_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask) -{ - iter->image->bits.get_scanline_64 ( - iter->image, iter->x, iter->y++, iter->width, iter->buffer, mask); - - return iter->buffer; -} - -void -_pixman_bits_image_src_iter_init (pixman_image_t *image, - pixman_iter_t *iter, - int x, int y, int width, int height, - uint8_t *buffer, iter_flags_t flags) -{ - if (flags & ITER_NARROW) - iter->get_scanline = src_get_scanline_narrow; - else - iter->get_scanline = src_get_scanline_wide; -} - -static uint32_t * -dest_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask) -{ - pixman_image_t *image = iter->image; - int x = iter->x; - int y = iter->y; - int width = iter->width; - uint32_t * buffer = iter->buffer; - - image->bits.fetch_scanline_32 (image, x, y, width, buffer, mask); - if (image->common.alpha_map) - { - x -= image->common.alpha_origin_x; - y -= image->common.alpha_origin_y; - - image->common.alpha_map->fetch_scanline_32 ( - (pixman_image_t *)image->common.alpha_map, - x, y, width, buffer, mask); - } - - return iter->buffer; -} - -static uint32_t * -dest_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask) -{ - bits_image_t * image = &iter->image->bits; - int x = iter->x; - int y = iter->y; - int width = iter->width; - uint32_t * buffer = iter->buffer; - - image->fetch_scanline_64 ( - (pixman_image_t *)image, x, y, width, buffer, mask); - if (image->common.alpha_map) - { - x -= image->common.alpha_origin_x; - y -= image->common.alpha_origin_y; - - image->common.alpha_map->fetch_scanline_64 ( - (pixman_image_t *)image->common.alpha_map, x, y, width, buffer, mask); - } - - return iter->buffer; -} - -static void -dest_write_back_narrow (pixman_iter_t *iter) -{ - bits_image_t * image = &iter->image->bits; - int x = iter->x; - int y = iter->y; - int width = iter->width; - const uint32_t *buffer = iter->buffer; - - image->store_scanline_32 (image, x, y, width, buffer); - - if (image->common.alpha_map) - { - x -= image->common.alpha_origin_x; - y -= image->common.alpha_origin_y; - - image->common.alpha_map->store_scanline_32 ( - image->common.alpha_map, x, y, width, buffer); - } - - iter->y++; -} - -static void -dest_write_back_wide (pixman_iter_t *iter) -{ - bits_image_t * image = &iter->image->bits; - int x = iter->x; - int y = iter->y; - int width = iter->width; - const uint32_t *buffer = iter->buffer; - - image->store_scanline_64 (image, x, y, width, buffer); - - if (image->common.alpha_map) - { - x -= image->common.alpha_origin_x; - y -= image->common.alpha_origin_y; - - image->common.alpha_map->store_scanline_64 ( - image->common.alpha_map, x, y, width, buffer); - } - - iter->y++; -} - -static void -dest_write_back_direct (pixman_iter_t *iter) -{ - iter->buffer += iter->image->bits.rowstride; -} - -void -_pixman_bits_image_dest_iter_init (pixman_image_t *image, - pixman_iter_t *iter, - int x, int y, int width, int height, - uint8_t *buffer, iter_flags_t flags) -{ - if (flags & ITER_NARROW) - { - if (((image->common.flags & - (FAST_PATH_NO_ALPHA_MAP | FAST_PATH_NO_ACCESSORS)) == - (FAST_PATH_NO_ALPHA_MAP | FAST_PATH_NO_ACCESSORS)) && - (image->bits.format == PIXMAN_a8r8g8b8 || - (image->bits.format == PIXMAN_x8r8g8b8 && - (flags & ITER_LOCALIZED_ALPHA)))) - { - iter->buffer = image->bits.bits + y * image->bits.rowstride + x; - - iter->get_scanline = _pixman_iter_get_scanline_noop; - iter->write_back = dest_write_back_direct; - } - else - { - if ((flags & (ITER_IGNORE_RGB | ITER_IGNORE_ALPHA)) == - (ITER_IGNORE_RGB | ITER_IGNORE_ALPHA)) - { - iter->get_scanline = _pixman_iter_get_scanline_noop; - } - else - { - iter->get_scanline = dest_get_scanline_narrow; - } - - iter->write_back = dest_write_back_narrow; - } - } - else - { - iter->get_scanline = dest_get_scanline_wide; - iter->write_back = dest_write_back_wide; - } -} - -static uint32_t * -create_bits (pixman_format_code_t format, - int width, - int height, - int * rowstride_bytes) -{ - int stride; - int buf_size; - int bpp; - - /* what follows is a long-winded way, avoiding any possibility of integer - * overflows, of saying: - * stride = ((width * bpp + 0x1f) >> 5) * sizeof (uint32_t); - */ - - bpp = PIXMAN_FORMAT_BPP (format); - if (pixman_multiply_overflows_int (width, bpp)) - return NULL; - - stride = width * bpp; - if (pixman_addition_overflows_int (stride, 0x1f)) - return NULL; - - stride += 0x1f; - stride >>= 5; - - stride *= sizeof (uint32_t); - - if (pixman_multiply_overflows_int (height, stride)) - return NULL; - - buf_size = height * stride; - - if (rowstride_bytes) - *rowstride_bytes = stride; - - return calloc (buf_size, 1); -} - -PIXMAN_EXPORT pixman_image_t * -pixman_image_create_bits (pixman_format_code_t format, - int width, - int height, - uint32_t * bits, - int rowstride_bytes) -{ - pixman_image_t *image; - uint32_t *free_me = NULL; - - /* must be a whole number of uint32_t's - */ - return_val_if_fail ( - bits == NULL || (rowstride_bytes % sizeof (uint32_t)) == 0, NULL); - - return_val_if_fail (PIXMAN_FORMAT_BPP (format) >= PIXMAN_FORMAT_DEPTH (format), NULL); - - if (!bits && width && height) - { - free_me = bits = create_bits (format, width, height, &rowstride_bytes); - if (!bits) - return NULL; - } - - image = _pixman_image_allocate (); - - if (!image) - { - if (free_me) - free (free_me); - - return NULL; - } - - image->type = BITS; - image->bits.format = format; - image->bits.width = width; - image->bits.height = height; - image->bits.bits = bits; - image->bits.free_me = free_me; - image->bits.read_func = NULL; - image->bits.write_func = NULL; - - /* The rowstride is stored in number of uint32_t */ - image->bits.rowstride = rowstride_bytes / (int) sizeof (uint32_t); - - image->bits.indexed = NULL; - - image->common.property_changed = bits_image_property_changed; - - _pixman_image_reset_clip_region (image); - - return image; -} +/*
+ * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
+ * 2005 Lars Knoll & Zack Rusin, Trolltech
+ * 2008 Aaron Plattner, NVIDIA Corporation
+ * Copyright © 2000 SuSE, Inc.
+ * Copyright © 2007, 2009 Red Hat, Inc.
+ * Copyright © 2008 André Tupinambá <andrelrt@gmail.com>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "pixman-private.h"
+#include "pixman-combine32.h"
+
+/*
+ * By default, just evaluate the image at 32bpp and expand. Individual image
+ * types can plug in a better scanline getter if they want to. For example
+ * we could produce smoother gradients by evaluating them at higher color
+ * depth, but that's a project for the future.
+ */
+static void
+_pixman_image_get_scanline_generic_64 (pixman_image_t * image,
+ int x,
+ int y,
+ int width,
+ uint32_t * buffer,
+ const uint32_t * mask)
+{
+ uint32_t *mask8 = NULL;
+
+ /* Contract the mask image, if one exists, so that the 32-bit fetch
+ * function can use it.
+ */
+ if (mask)
+ {
+ mask8 = pixman_malloc_ab (width, sizeof(uint32_t));
+ if (!mask8)
+ return;
+
+ pixman_contract (mask8, (uint64_t *)mask, width);
+ }
+
+ /* Fetch the source image into the first half of buffer. */
+ image->bits.get_scanline_32 (image, x, y, width, (uint32_t*)buffer, mask8);
+
+ /* Expand from 32bpp to 64bpp in place. */
+ pixman_expand ((uint64_t *)buffer, buffer, PIXMAN_a8r8g8b8, width);
+
+ free (mask8);
+}
+
+/* Fetch functions */
+
+static force_inline uint32_t
+fetch_pixel_no_alpha (bits_image_t *image,
+ int x, int y, pixman_bool_t check_bounds)
+{
+ if (check_bounds &&
+ (x < 0 || x >= image->width || y < 0 || y >= image->height))
+ {
+ return 0;
+ }
+
+ return image->fetch_pixel_32 (image, x, y);
+}
+
+typedef uint32_t (* get_pixel_t) (bits_image_t *image,
+ int x, int y, pixman_bool_t check_bounds);
+
+static force_inline void
+repeat (pixman_repeat_t repeat, int size, int *coord)
+{
+ switch (repeat)
+ {
+ case PIXMAN_REPEAT_NORMAL:
+ *coord = MOD (*coord, size);
+ break;
+
+ case PIXMAN_REPEAT_PAD:
+ *coord = CLIP (*coord, 0, size - 1);
+ break;
+
+ case PIXMAN_REPEAT_REFLECT:
+ *coord = MOD (*coord, size * 2);
+
+ if (*coord >= size)
+ *coord = size * 2 - *coord - 1;
+ break;
+
+ case PIXMAN_REPEAT_NONE:
+ break;
+
+ default:
+ break;
+ }
+}
+
+static force_inline uint32_t
+bits_image_fetch_pixel_nearest (bits_image_t *image,
+ pixman_fixed_t x,
+ pixman_fixed_t y,
+ get_pixel_t get_pixel)
+{
+ int x0 = pixman_fixed_to_int (x - pixman_fixed_e);
+ int y0 = pixman_fixed_to_int (y - pixman_fixed_e);
+
+ if (image->common.repeat != PIXMAN_REPEAT_NONE)
+ {
+ repeat (image->common.repeat, image->width, &x0);
+ repeat (image->common.repeat, image->height, &y0);
+
+ return get_pixel (image, x0, y0, FALSE);
+ }
+ else
+ {
+ return get_pixel (image, x0, y0, TRUE);
+ }
+}
+
+#if SIZEOF_LONG > 4
+
+static force_inline uint32_t
+bilinear_interpolation (uint32_t tl, uint32_t tr,
+ uint32_t bl, uint32_t br,
+ int distx, int disty)
+{
+ uint64_t distxy, distxiy, distixy, distixiy;
+ uint64_t tl64, tr64, bl64, br64;
+ uint64_t f, r;
+
+ distxy = distx * disty;
+ distxiy = distx * (256 - disty);
+ distixy = (256 - distx) * disty;
+ distixiy = (256 - distx) * (256 - disty);
+
+ /* Alpha and Blue */
+ tl64 = tl & 0xff0000ff;
+ tr64 = tr & 0xff0000ff;
+ bl64 = bl & 0xff0000ff;
+ br64 = br & 0xff0000ff;
+
+ f = tl64 * distixiy + tr64 * distxiy + bl64 * distixy + br64 * distxy;
+ r = f & 0x0000ff0000ff0000ull;
+
+ /* Red and Green */
+ tl64 = tl;
+ tl64 = ((tl64 << 16) & 0x000000ff00000000ull) | (tl64 & 0x0000ff00ull);
+
+ tr64 = tr;
+ tr64 = ((tr64 << 16) & 0x000000ff00000000ull) | (tr64 & 0x0000ff00ull);
+
+ bl64 = bl;
+ bl64 = ((bl64 << 16) & 0x000000ff00000000ull) | (bl64 & 0x0000ff00ull);
+
+ br64 = br;
+ br64 = ((br64 << 16) & 0x000000ff00000000ull) | (br64 & 0x0000ff00ull);
+
+ f = tl64 * distixiy + tr64 * distxiy + bl64 * distixy + br64 * distxy;
+ r |= ((f >> 16) & 0x000000ff00000000ull) | (f & 0xff000000ull);
+
+ return (uint32_t)(r >> 16);
+}
+
+#else
+
+static force_inline uint32_t
+bilinear_interpolation (uint32_t tl, uint32_t tr,
+ uint32_t bl, uint32_t br,
+ int distx, int disty)
+{
+ int distxy, distxiy, distixy, distixiy;
+ uint32_t f, r;
+
+ distxy = distx * disty;
+ distxiy = (distx << 8) - distxy; /* distx * (256 - disty) */
+ distixy = (disty << 8) - distxy; /* disty * (256 - distx) */
+ distixiy =
+ 256 * 256 - (disty << 8) -
+ (distx << 8) + distxy; /* (256 - distx) * (256 - disty) */
+
+ /* Blue */
+ r = (tl & 0x000000ff) * distixiy + (tr & 0x000000ff) * distxiy
+ + (bl & 0x000000ff) * distixy + (br & 0x000000ff) * distxy;
+
+ /* Green */
+ f = (tl & 0x0000ff00) * distixiy + (tr & 0x0000ff00) * distxiy
+ + (bl & 0x0000ff00) * distixy + (br & 0x0000ff00) * distxy;
+ r |= f & 0xff000000;
+
+ tl >>= 16;
+ tr >>= 16;
+ bl >>= 16;
+ br >>= 16;
+ r >>= 16;
+
+ /* Red */
+ f = (tl & 0x000000ff) * distixiy + (tr & 0x000000ff) * distxiy
+ + (bl & 0x000000ff) * distixy + (br & 0x000000ff) * distxy;
+ r |= f & 0x00ff0000;
+
+ /* Alpha */
+ f = (tl & 0x0000ff00) * distixiy + (tr & 0x0000ff00) * distxiy
+ + (bl & 0x0000ff00) * distixy + (br & 0x0000ff00) * distxy;
+ r |= f & 0xff000000;
+
+ return r;
+}
+
+#endif
+
+static force_inline uint32_t
+bits_image_fetch_pixel_bilinear (bits_image_t *image,
+ pixman_fixed_t x,
+ pixman_fixed_t y,
+ get_pixel_t get_pixel)
+{
+ pixman_repeat_t repeat_mode = image->common.repeat;
+ int width = image->width;
+ int height = image->height;
+ int x1, y1, x2, y2;
+ uint32_t tl, tr, bl, br;
+ int32_t distx, disty;
+
+ x1 = x - pixman_fixed_1 / 2;
+ y1 = y - pixman_fixed_1 / 2;
+
+ distx = (x1 >> 8) & 0xff;
+ disty = (y1 >> 8) & 0xff;
+
+ x1 = pixman_fixed_to_int (x1);
+ y1 = pixman_fixed_to_int (y1);
+ x2 = x1 + 1;
+ y2 = y1 + 1;
+
+ if (repeat_mode != PIXMAN_REPEAT_NONE)
+ {
+ repeat (repeat_mode, width, &x1);
+ repeat (repeat_mode, height, &y1);
+ repeat (repeat_mode, width, &x2);
+ repeat (repeat_mode, height, &y2);
+
+ tl = get_pixel (image, x1, y1, FALSE);
+ bl = get_pixel (image, x1, y2, FALSE);
+ tr = get_pixel (image, x2, y1, FALSE);
+ br = get_pixel (image, x2, y2, FALSE);
+ }
+ else
+ {
+ tl = get_pixel (image, x1, y1, TRUE);
+ tr = get_pixel (image, x2, y1, TRUE);
+ bl = get_pixel (image, x1, y2, TRUE);
+ br = get_pixel (image, x2, y2, TRUE);
+ }
+
+ return bilinear_interpolation (tl, tr, bl, br, distx, disty);
+}
+
+static void
+bits_image_fetch_bilinear_no_repeat_8888 (pixman_image_t * ima,
+ int offset,
+ int line,
+ int width,
+ uint32_t * buffer,
+ const uint32_t * mask)
+{
+ bits_image_t *bits = &ima->bits;
+ pixman_fixed_t x_top, x_bottom, x;
+ pixman_fixed_t ux_top, ux_bottom, ux;
+ pixman_vector_t v;
+ uint32_t top_mask, bottom_mask;
+ uint32_t *top_row;
+ uint32_t *bottom_row;
+ uint32_t *end;
+ uint32_t zero[2] = { 0, 0 };
+ uint32_t one = 1;
+ int y, y1, y2;
+ int disty;
+ int mask_inc;
+ int w;
+
+ /* reference point is the center of the pixel */
+ v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2;
+ v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2;
+ v.vector[2] = pixman_fixed_1;
+
+ if (!pixman_transform_point_3d (bits->common.transform, &v))
+ return;
+
+ ux = ux_top = ux_bottom = bits->common.transform->matrix[0][0];
+ x = x_top = x_bottom = v.vector[0] - pixman_fixed_1/2;
+
+ y = v.vector[1] - pixman_fixed_1/2;
+ disty = (y >> 8) & 0xff;
+
+ /* Load the pointers to the first and second lines from the source
+ * image that bilinear code must read.
+ *
+ * The main trick in this code is about the check if any line are
+ * outside of the image;
+ *
+ * When I realize that a line (any one) is outside, I change
+ * the pointer to a dummy area with zeros. Once I change this, I
+ * must be sure the pointer will not change, so I set the
+ * variables to each pointer increments inside the loop.
+ */
+ y1 = pixman_fixed_to_int (y);
+ y2 = y1 + 1;
+
+ if (y1 < 0 || y1 >= bits->height)
+ {
+ top_row = zero;
+ x_top = 0;
+ ux_top = 0;
+ }
+ else
+ {
+ top_row = bits->bits + y1 * bits->rowstride;
+ x_top = x;
+ ux_top = ux;
+ }
+
+ if (y2 < 0 || y2 >= bits->height)
+ {
+ bottom_row = zero;
+ x_bottom = 0;
+ ux_bottom = 0;
+ }
+ else
+ {
+ bottom_row = bits->bits + y2 * bits->rowstride;
+ x_bottom = x;
+ ux_bottom = ux;
+ }
+
+ /* Instead of checking whether the operation uses the mast in
+ * each loop iteration, verify this only once and prepare the
+ * variables to make the code smaller inside the loop.
+ */
+ if (!mask)
+ {
+ mask_inc = 0;
+ mask = &one;
+ }
+ else
+ {
+ /* If have a mask, prepare the variables to check it */
+ mask_inc = 1;
+ }
+
+ /* If both are zero, then the whole thing is zero */
+ if (top_row == zero && bottom_row == zero)
+ {
+ memset (buffer, 0, width * sizeof (uint32_t));
+ return;
+ }
+ else if (bits->format == PIXMAN_x8r8g8b8)
+ {
+ if (top_row == zero)
+ {
+ top_mask = 0;
+ bottom_mask = 0xff000000;
+ }
+ else if (bottom_row == zero)
+ {
+ top_mask = 0xff000000;
+ bottom_mask = 0;
+ }
+ else
+ {
+ top_mask = 0xff000000;
+ bottom_mask = 0xff000000;
+ }
+ }
+ else
+ {
+ top_mask = 0;
+ bottom_mask = 0;
+ }
+
+ end = buffer + width;
+
+ /* Zero fill to the left of the image */
+ while (buffer < end && x < pixman_fixed_minus_1)
+ {
+ *buffer++ = 0;
+ x += ux;
+ x_top += ux_top;
+ x_bottom += ux_bottom;
+ mask += mask_inc;
+ }
+
+ /* Left edge
+ */
+ while (buffer < end && x < 0)
+ {
+ uint32_t tr, br;
+ int32_t distx;
+
+ tr = top_row[pixman_fixed_to_int (x_top) + 1] | top_mask;
+ br = bottom_row[pixman_fixed_to_int (x_bottom) + 1] | bottom_mask;
+
+ distx = (x >> 8) & 0xff;
+
+ *buffer++ = bilinear_interpolation (0, tr, 0, br, distx, disty);
+
+ x += ux;
+ x_top += ux_top;
+ x_bottom += ux_bottom;
+ mask += mask_inc;
+ }
+
+ /* Main part */
+ w = pixman_int_to_fixed (bits->width - 1);
+
+ while (buffer < end && x < w)
+ {
+ if (*mask)
+ {
+ uint32_t tl, tr, bl, br;
+ int32_t distx;
+
+ tl = top_row [pixman_fixed_to_int (x_top)] | top_mask;
+ tr = top_row [pixman_fixed_to_int (x_top) + 1] | top_mask;
+ bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask;
+ br = bottom_row [pixman_fixed_to_int (x_bottom) + 1] | bottom_mask;
+
+ distx = (x >> 8) & 0xff;
+
+ *buffer = bilinear_interpolation (tl, tr, bl, br, distx, disty);
+ }
+
+ buffer++;
+ x += ux;
+ x_top += ux_top;
+ x_bottom += ux_bottom;
+ mask += mask_inc;
+ }
+
+ /* Right Edge */
+ w = pixman_int_to_fixed (bits->width);
+ while (buffer < end && x < w)
+ {
+ if (*mask)
+ {
+ uint32_t tl, bl;
+ int32_t distx;
+
+ tl = top_row [pixman_fixed_to_int (x_top)] | top_mask;
+ bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask;
+
+ distx = (x >> 8) & 0xff;
+
+ *buffer = bilinear_interpolation (tl, 0, bl, 0, distx, disty);
+ }
+
+ buffer++;
+ x += ux;
+ x_top += ux_top;
+ x_bottom += ux_bottom;
+ mask += mask_inc;
+ }
+
+ /* Zero fill to the left of the image */
+ while (buffer < end)
+ *buffer++ = 0;
+}
+
+static force_inline uint32_t
+bits_image_fetch_pixel_convolution (bits_image_t *image,
+ pixman_fixed_t x,
+ pixman_fixed_t y,
+ get_pixel_t get_pixel)
+{
+ pixman_fixed_t *params = image->common.filter_params;
+ int x_off = (params[0] - pixman_fixed_1) >> 1;
+ int y_off = (params[1] - pixman_fixed_1) >> 1;
+ int32_t cwidth = pixman_fixed_to_int (params[0]);
+ int32_t cheight = pixman_fixed_to_int (params[1]);
+ int32_t srtot, sgtot, sbtot, satot;
+ int32_t i, j, x1, x2, y1, y2;
+ pixman_repeat_t repeat_mode = image->common.repeat;
+ int width = image->width;
+ int height = image->height;
+
+ params += 2;
+
+ x1 = pixman_fixed_to_int (x - pixman_fixed_e - x_off);
+ y1 = pixman_fixed_to_int (y - pixman_fixed_e - y_off);
+ x2 = x1 + cwidth;
+ y2 = y1 + cheight;
+
+ srtot = sgtot = sbtot = satot = 0;
+
+ for (i = y1; i < y2; ++i)
+ {
+ for (j = x1; j < x2; ++j)
+ {
+ int rx = j;
+ int ry = i;
+
+ pixman_fixed_t f = *params;
+
+ if (f)
+ {
+ uint32_t pixel;
+
+ if (repeat_mode != PIXMAN_REPEAT_NONE)
+ {
+ repeat (repeat_mode, width, &rx);
+ repeat (repeat_mode, height, &ry);
+
+ pixel = get_pixel (image, rx, ry, FALSE);
+ }
+ else
+ {
+ pixel = get_pixel (image, rx, ry, TRUE);
+ }
+
+ srtot += RED_8 (pixel) * f;
+ sgtot += GREEN_8 (pixel) * f;
+ sbtot += BLUE_8 (pixel) * f;
+ satot += ALPHA_8 (pixel) * f;
+ }
+
+ params++;
+ }
+ }
+
+ satot >>= 16;
+ srtot >>= 16;
+ sgtot >>= 16;
+ sbtot >>= 16;
+
+ satot = CLIP (satot, 0, 0xff);
+ srtot = CLIP (srtot, 0, 0xff);
+ sgtot = CLIP (sgtot, 0, 0xff);
+ sbtot = CLIP (sbtot, 0, 0xff);
+
+ return ((satot << 24) | (srtot << 16) | (sgtot << 8) | (sbtot));
+}
+
+static force_inline uint32_t
+bits_image_fetch_pixel_filtered (bits_image_t *image,
+ pixman_fixed_t x,
+ pixman_fixed_t y,
+ get_pixel_t get_pixel)
+{
+ switch (image->common.filter)
+ {
+ case PIXMAN_FILTER_NEAREST:
+ case PIXMAN_FILTER_FAST:
+ return bits_image_fetch_pixel_nearest (image, x, y, get_pixel);
+ break;
+
+ case PIXMAN_FILTER_BILINEAR:
+ case PIXMAN_FILTER_GOOD:
+ case PIXMAN_FILTER_BEST:
+ return bits_image_fetch_pixel_bilinear (image, x, y, get_pixel);
+ break;
+
+ case PIXMAN_FILTER_CONVOLUTION:
+ return bits_image_fetch_pixel_convolution (image, x, y, get_pixel);
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static void
+bits_image_fetch_affine_no_alpha (pixman_image_t * image,
+ int offset,
+ int line,
+ int width,
+ uint32_t * buffer,
+ const uint32_t * mask)
+{
+ pixman_fixed_t x, y;
+ pixman_fixed_t ux, uy;
+ pixman_vector_t v;
+ int i;
+
+ /* reference point is the center of the pixel */
+ v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2;
+ v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2;
+ v.vector[2] = pixman_fixed_1;
+
+ if (image->common.transform)
+ {
+ if (!pixman_transform_point_3d (image->common.transform, &v))
+ return;
+
+ ux = image->common.transform->matrix[0][0];
+ uy = image->common.transform->matrix[1][0];
+ }
+ else
+ {
+ ux = pixman_fixed_1;
+ uy = 0;
+ }
+
+ x = v.vector[0];
+ y = v.vector[1];
+
+ for (i = 0; i < width; ++i)
+ {
+ if (!mask || mask[i])
+ {
+ buffer[i] = bits_image_fetch_pixel_filtered (
+ &image->bits, x, y, fetch_pixel_no_alpha);
+ }
+
+ x += ux;
+ y += uy;
+ }
+}
+
+/* General fetcher */
+static force_inline uint32_t
+fetch_pixel_general (bits_image_t *image, int x, int y, pixman_bool_t check_bounds)
+{
+ uint32_t pixel;
+
+ if (check_bounds &&
+ (x < 0 || x >= image->width || y < 0 || y >= image->height))
+ {
+ return 0;
+ }
+
+ pixel = image->fetch_pixel_32 (image, x, y);
+
+ if (image->common.alpha_map)
+ {
+ uint32_t pixel_a;
+
+ x -= image->common.alpha_origin_x;
+ y -= image->common.alpha_origin_y;
+
+ if (x < 0 || x >= image->common.alpha_map->width ||
+ y < 0 || y >= image->common.alpha_map->height)
+ {
+ pixel_a = 0;
+ }
+ else
+ {
+ pixel_a = image->common.alpha_map->fetch_pixel_32 (
+ image->common.alpha_map, x, y);
+
+ pixel_a = ALPHA_8 (pixel_a);
+ }
+
+ pixel &= 0x00ffffff;
+ pixel |= (pixel_a << 24);
+ }
+
+ return pixel;
+}
+
+static void
+bits_image_fetch_general (pixman_image_t * image,
+ int offset,
+ int line,
+ int width,
+ uint32_t * buffer,
+ const uint32_t * mask)
+{
+ pixman_fixed_t x, y, w;
+ pixman_fixed_t ux, uy, uw;
+ pixman_vector_t v;
+ int i;
+
+ /* reference point is the center of the pixel */
+ v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2;
+ v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2;
+ v.vector[2] = pixman_fixed_1;
+
+ if (image->common.transform)
+ {
+ if (!pixman_transform_point_3d (image->common.transform, &v))
+ return;
+
+ ux = image->common.transform->matrix[0][0];
+ uy = image->common.transform->matrix[1][0];
+ uw = image->common.transform->matrix[2][0];
+ }
+ else
+ {
+ ux = pixman_fixed_1;
+ uy = 0;
+ uw = 0;
+ }
+
+ x = v.vector[0];
+ y = v.vector[1];
+ w = v.vector[2];
+
+ for (i = 0; i < width; ++i)
+ {
+ pixman_fixed_t x0, y0;
+
+ if (!mask || mask[i])
+ {
+ if (w != 0)
+ {
+ x0 = ((pixman_fixed_48_16_t)x << 16) / w;
+ y0 = ((pixman_fixed_48_16_t)y << 16) / w;
+ }
+ else
+ {
+ x0 = 0;
+ y0 = 0;
+ }
+
+ buffer[i] = bits_image_fetch_pixel_filtered (
+ &image->bits, x0, y0, fetch_pixel_general);
+ }
+
+ x += ux;
+ y += uy;
+ w += uw;
+ }
+}
+
+static const uint8_t zero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+
+typedef uint32_t (* convert_pixel_t) (const uint8_t *row, int x);
+
+static force_inline void
+bits_image_fetch_bilinear_affine (pixman_image_t * image,
+ int offset,
+ int line,
+ int width,
+ uint32_t * buffer,
+ const uint32_t * mask,
+
+ convert_pixel_t convert_pixel,
+ pixman_format_code_t format,
+ pixman_repeat_t repeat_mode)
+{
+ pixman_fixed_t x, y;
+ pixman_fixed_t ux, uy;
+ pixman_vector_t v;
+ bits_image_t *bits = &image->bits;
+ int i;
+
+ /* reference point is the center of the pixel */
+ v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2;
+ v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2;
+ v.vector[2] = pixman_fixed_1;
+
+ if (!pixman_transform_point_3d (image->common.transform, &v))
+ return;
+
+ ux = image->common.transform->matrix[0][0];
+ uy = image->common.transform->matrix[1][0];
+
+ x = v.vector[0];
+ y = v.vector[1];
+
+ for (i = 0; i < width; ++i)
+ {
+ int x1, y1, x2, y2;
+ uint32_t tl, tr, bl, br;
+ int32_t distx, disty;
+ int width = image->bits.width;
+ int height = image->bits.height;
+ const uint8_t *row1;
+ const uint8_t *row2;
+
+ if (mask && !mask[i])
+ goto next;
+
+ x1 = x - pixman_fixed_1 / 2;
+ y1 = y - pixman_fixed_1 / 2;
+
+ distx = (x1 >> 8) & 0xff;
+ disty = (y1 >> 8) & 0xff;
+
+ y1 = pixman_fixed_to_int (y1);
+ y2 = y1 + 1;
+ x1 = pixman_fixed_to_int (x1);
+ x2 = x1 + 1;
+
+ if (repeat_mode != PIXMAN_REPEAT_NONE)
+ {
+ uint32_t mask;
+
+ mask = PIXMAN_FORMAT_A (format)? 0 : 0xff000000;
+
+ repeat (repeat_mode, width, &x1);
+ repeat (repeat_mode, height, &y1);
+ repeat (repeat_mode, width, &x2);
+ repeat (repeat_mode, height, &y2);
+
+ row1 = (uint8_t *)bits->bits + bits->rowstride * 4 * y1;
+ row2 = (uint8_t *)bits->bits + bits->rowstride * 4 * y2;
+
+ tl = convert_pixel (row1, x1) | mask;
+ tr = convert_pixel (row1, x2) | mask;
+ bl = convert_pixel (row2, x1) | mask;
+ br = convert_pixel (row2, x2) | mask;
+ }
+ else
+ {
+ uint32_t mask1, mask2;
+ int bpp;
+
+ /* Note: PIXMAN_FORMAT_BPP() returns an unsigned value,
+ * which means if you use it in expressions, those
+ * expressions become unsigned themselves. Since
+ * the variables below can be negative in some cases,
+ * that will lead to crashes on 64 bit architectures.
+ *
+ * So this line makes sure bpp is signed
+ */
+ bpp = PIXMAN_FORMAT_BPP (format);
+
+ if (x1 >= width || x2 < 0 || y1 >= height || y2 < 0)
+ {
+ buffer[i] = 0;
+ goto next;
+ }
+
+ if (y2 == 0)
+ {
+ row1 = zero;
+ mask1 = 0;
+ }
+ else
+ {
+ row1 = (uint8_t *)bits->bits + bits->rowstride * 4 * y1;
+ row1 += bpp / 8 * x1;
+
+ mask1 = PIXMAN_FORMAT_A (format)? 0 : 0xff000000;
+ }
+
+ if (y1 == height - 1)
+ {
+ row2 = zero;
+ mask2 = 0;
+ }
+ else
+ {
+ row2 = (uint8_t *)bits->bits + bits->rowstride * 4 * y2;
+ row2 += bpp / 8 * x1;
+
+ mask2 = PIXMAN_FORMAT_A (format)? 0 : 0xff000000;
+ }
+
+ if (x2 == 0)
+ {
+ tl = 0;
+ bl = 0;
+ }
+ else
+ {
+ tl = convert_pixel (row1, 0) | mask1;
+ bl = convert_pixel (row2, 0) | mask2;
+ }
+
+ if (x1 == width - 1)
+ {
+ tr = 0;
+ br = 0;
+ }
+ else
+ {
+ tr = convert_pixel (row1, 1) | mask1;
+ br = convert_pixel (row2, 1) | mask2;
+ }
+ }
+
+ buffer[i] = bilinear_interpolation (
+ tl, tr, bl, br, distx, disty);
+
+ next:
+ x += ux;
+ y += uy;
+ }
+}
+
+static force_inline void
+bits_image_fetch_nearest_affine (pixman_image_t * image,
+ int offset,
+ int line,
+ int width,
+ uint32_t * buffer,
+ const uint32_t * mask,
+
+ convert_pixel_t convert_pixel,
+ pixman_format_code_t format,
+ pixman_repeat_t repeat_mode)
+{
+ pixman_fixed_t x, y;
+ pixman_fixed_t ux, uy;
+ pixman_vector_t v;
+ bits_image_t *bits = &image->bits;
+ int i;
+
+ /* reference point is the center of the pixel */
+ v.vector[0] = pixman_int_to_fixed (offset) + pixman_fixed_1 / 2;
+ v.vector[1] = pixman_int_to_fixed (line) + pixman_fixed_1 / 2;
+ v.vector[2] = pixman_fixed_1;
+
+ if (!pixman_transform_point_3d (image->common.transform, &v))
+ return;
+
+ ux = image->common.transform->matrix[0][0];
+ uy = image->common.transform->matrix[1][0];
+
+ x = v.vector[0];
+ y = v.vector[1];
+
+ for (i = 0; i < width; ++i)
+ {
+ int width, height, x0, y0;
+ const uint8_t *row;
+
+ if (mask && !mask[i])
+ goto next;
+
+ width = image->bits.width;
+ height = image->bits.height;
+ x0 = pixman_fixed_to_int (x - pixman_fixed_e);
+ y0 = pixman_fixed_to_int (y - pixman_fixed_e);
+
+ if (repeat_mode == PIXMAN_REPEAT_NONE &&
+ (y0 < 0 || y0 >= height || x0 < 0 || x0 >= width))
+ {
+ buffer[i] = 0;
+ }
+ else
+ {
+ uint32_t mask = PIXMAN_FORMAT_A (format)? 0 : 0xff000000;
+
+ if (repeat_mode != PIXMAN_REPEAT_NONE)
+ {
+ repeat (repeat_mode, width, &x0);
+ repeat (repeat_mode, height, &y0);
+ }
+
+ row = (uint8_t *)bits->bits + bits->rowstride * 4 * y0;
+
+ buffer[i] = convert_pixel (row, x0) | mask;
+ }
+
+ next:
+ x += ux;
+ y += uy;
+ }
+}
+
+static force_inline uint32_t
+convert_a8r8g8b8 (const uint8_t *row, int x)
+{
+ return *(((uint32_t *)row) + x);
+}
+
+static force_inline uint32_t
+convert_x8r8g8b8 (const uint8_t *row, int x)
+{
+ return *(((uint32_t *)row) + x);
+}
+
+static force_inline uint32_t
+convert_a8 (const uint8_t *row, int x)
+{
+ return *(row + x) << 24;
+}
+
+static force_inline uint32_t
+convert_r5g6b5 (const uint8_t *row, int x)
+{
+ return CONVERT_0565_TO_0888 (*((uint16_t *)row + x));
+}
+
+#define MAKE_BILINEAR_FETCHER(name, format, repeat_mode) \
+ static void \
+ bits_image_fetch_bilinear_affine_ ## name (pixman_image_t *image, \
+ int offset, \
+ int line, \
+ int width, \
+ uint32_t * buffer, \
+ const uint32_t * mask) \
+ { \
+ bits_image_fetch_bilinear_affine (image, offset, line, \
+ width, buffer, mask, \
+ convert_ ## format, \
+ PIXMAN_ ## format, \
+ repeat_mode); \
+ }
+
+#define MAKE_NEAREST_FETCHER(name, format, repeat_mode) \
+ static void \
+ bits_image_fetch_nearest_affine_ ## name (pixman_image_t *image, \
+ int offset, \
+ int line, \
+ int width, \
+ uint32_t * buffer, \
+ const uint32_t * mask) \
+ { \
+ bits_image_fetch_nearest_affine (image, offset, line, \
+ width, buffer, mask, \
+ convert_ ## format, \
+ PIXMAN_ ## format, \
+ repeat_mode); \
+ }
+
+#define MAKE_FETCHERS(name, format, repeat_mode) \
+ MAKE_NEAREST_FETCHER (name, format, repeat_mode) \
+ MAKE_BILINEAR_FETCHER (name, format, repeat_mode)
+
+MAKE_FETCHERS (pad_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_PAD)
+MAKE_FETCHERS (none_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_NONE)
+MAKE_FETCHERS (reflect_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_REFLECT)
+MAKE_FETCHERS (normal_a8r8g8b8, a8r8g8b8, PIXMAN_REPEAT_NORMAL)
+MAKE_FETCHERS (pad_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_PAD)
+MAKE_FETCHERS (none_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_NONE)
+MAKE_FETCHERS (reflect_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_REFLECT)
+MAKE_FETCHERS (normal_x8r8g8b8, x8r8g8b8, PIXMAN_REPEAT_NORMAL)
+MAKE_FETCHERS (pad_a8, a8, PIXMAN_REPEAT_PAD)
+MAKE_FETCHERS (none_a8, a8, PIXMAN_REPEAT_NONE)
+MAKE_FETCHERS (reflect_a8, a8, PIXMAN_REPEAT_REFLECT)
+MAKE_FETCHERS (normal_a8, a8, PIXMAN_REPEAT_NORMAL)
+MAKE_FETCHERS (pad_r5g6b5, r5g6b5, PIXMAN_REPEAT_PAD)
+MAKE_FETCHERS (none_r5g6b5, r5g6b5, PIXMAN_REPEAT_NONE)
+MAKE_FETCHERS (reflect_r5g6b5, r5g6b5, PIXMAN_REPEAT_REFLECT)
+MAKE_FETCHERS (normal_r5g6b5, r5g6b5, PIXMAN_REPEAT_NORMAL)
+
+static void
+bits_image_fetch_solid_32 (pixman_image_t * image,
+ int x,
+ int y,
+ int width,
+ uint32_t * buffer,
+ const uint32_t * mask)
+{
+ uint32_t color;
+ uint32_t *end;
+
+ color = image->bits.fetch_pixel_32 (&image->bits, 0, 0);
+
+ end = buffer + width;
+ while (buffer < end)
+ *(buffer++) = color;
+}
+
+static void
+bits_image_fetch_solid_64 (pixman_image_t * image,
+ int x,
+ int y,
+ int width,
+ uint32_t * b,
+ const uint32_t * unused)
+{
+ uint64_t color;
+ uint64_t *buffer = (uint64_t *)b;
+ uint64_t *end;
+
+ color = image->bits.fetch_pixel_64 (&image->bits, 0, 0);
+
+ end = buffer + width;
+ while (buffer < end)
+ *(buffer++) = color;
+}
+
+static void
+bits_image_fetch_untransformed_repeat_none (bits_image_t *image,
+ pixman_bool_t wide,
+ int x,
+ int y,
+ int width,
+ uint32_t * buffer)
+{
+ uint32_t w;
+
+ if (y < 0 || y >= image->height)
+ {
+ memset (buffer, 0, width * (wide? 8 : 4));
+ return;
+ }
+
+ if (x < 0)
+ {
+ w = MIN (width, -x);
+
+ memset (buffer, 0, w * (wide ? 8 : 4));
+
+ width -= w;
+ buffer += w * (wide? 2 : 1);
+ x += w;
+ }
+
+ if (x < image->width)
+ {
+ w = MIN (width, image->width - x);
+
+ if (wide)
+ image->fetch_scanline_64 ((pixman_image_t *)image, x, y, w, buffer, NULL);
+ else
+ image->fetch_scanline_32 ((pixman_image_t *)image, x, y, w, buffer, NULL);
+
+ width -= w;
+ buffer += w * (wide? 2 : 1);
+ x += w;
+ }
+
+ memset (buffer, 0, width * (wide ? 8 : 4));
+}
+
+static void
+bits_image_fetch_untransformed_repeat_normal (bits_image_t *image,
+ pixman_bool_t wide,
+ int x,
+ int y,
+ int width,
+ uint32_t * buffer)
+{
+ uint32_t w;
+
+ while (y < 0)
+ y += image->height;
+
+ while (y >= image->height)
+ y -= image->height;
+
+ while (width)
+ {
+ while (x < 0)
+ x += image->width;
+ while (x >= image->width)
+ x -= image->width;
+
+ w = MIN (width, image->width - x);
+
+ if (wide)
+ image->fetch_scanline_64 ((pixman_image_t *)image, x, y, w, buffer, NULL);
+ else
+ image->fetch_scanline_32 ((pixman_image_t *)image, x, y, w, buffer, NULL);
+
+ buffer += w * (wide? 2 : 1);
+ x += w;
+ width -= w;
+ }
+}
+
+static void
+bits_image_fetch_untransformed_32 (pixman_image_t * image,
+ int x,
+ int y,
+ int width,
+ uint32_t * buffer,
+ const uint32_t * mask)
+{
+ if (image->common.repeat == PIXMAN_REPEAT_NONE)
+ {
+ bits_image_fetch_untransformed_repeat_none (
+ &image->bits, FALSE, x, y, width, buffer);
+ }
+ else
+ {
+ bits_image_fetch_untransformed_repeat_normal (
+ &image->bits, FALSE, x, y, width, buffer);
+ }
+}
+
+static void
+bits_image_fetch_untransformed_64 (pixman_image_t * image,
+ int x,
+ int y,
+ int width,
+ uint32_t * buffer,
+ const uint32_t * unused)
+{
+ if (image->common.repeat == PIXMAN_REPEAT_NONE)
+ {
+ bits_image_fetch_untransformed_repeat_none (
+ &image->bits, TRUE, x, y, width, buffer);
+ }
+ else
+ {
+ bits_image_fetch_untransformed_repeat_normal (
+ &image->bits, TRUE, x, y, width, buffer);
+ }
+}
+
+typedef struct
+{
+ pixman_format_code_t format;
+ uint32_t flags;
+ fetch_scanline_t fetch_32;
+ fetch_scanline_t fetch_64;
+} fetcher_info_t;
+
+static const fetcher_info_t fetcher_info[] =
+{
+ { PIXMAN_solid,
+ FAST_PATH_NO_ALPHA_MAP,
+ bits_image_fetch_solid_32,
+ bits_image_fetch_solid_64
+ },
+
+ { PIXMAN_any,
+ (FAST_PATH_NO_ALPHA_MAP |
+ FAST_PATH_ID_TRANSFORM |
+ FAST_PATH_NO_CONVOLUTION_FILTER |
+ FAST_PATH_NO_PAD_REPEAT |
+ FAST_PATH_NO_REFLECT_REPEAT),
+ bits_image_fetch_untransformed_32,
+ bits_image_fetch_untransformed_64
+ },
+
+#define FAST_BILINEAR_FLAGS \
+ (FAST_PATH_NO_ALPHA_MAP | \
+ FAST_PATH_NO_ACCESSORS | \
+ FAST_PATH_HAS_TRANSFORM | \
+ FAST_PATH_AFFINE_TRANSFORM | \
+ FAST_PATH_X_UNIT_POSITIVE | \
+ FAST_PATH_Y_UNIT_ZERO | \
+ FAST_PATH_NONE_REPEAT | \
+ FAST_PATH_BILINEAR_FILTER)
+
+ { PIXMAN_a8r8g8b8,
+ FAST_BILINEAR_FLAGS,
+ bits_image_fetch_bilinear_no_repeat_8888,
+ _pixman_image_get_scanline_generic_64
+ },
+
+ { PIXMAN_x8r8g8b8,
+ FAST_BILINEAR_FLAGS,
+ bits_image_fetch_bilinear_no_repeat_8888,
+ _pixman_image_get_scanline_generic_64
+ },
+
+#define GENERAL_BILINEAR_FLAGS \
+ (FAST_PATH_NO_ALPHA_MAP | \
+ FAST_PATH_NO_ACCESSORS | \
+ FAST_PATH_HAS_TRANSFORM | \
+ FAST_PATH_AFFINE_TRANSFORM | \
+ FAST_PATH_BILINEAR_FILTER)
+
+#define GENERAL_NEAREST_FLAGS \
+ (FAST_PATH_NO_ALPHA_MAP | \
+ FAST_PATH_NO_ACCESSORS | \
+ FAST_PATH_HAS_TRANSFORM | \
+ FAST_PATH_AFFINE_TRANSFORM | \
+ FAST_PATH_NEAREST_FILTER)
+
+#define BILINEAR_AFFINE_FAST_PATH(name, format, repeat) \
+ { PIXMAN_ ## format, \
+ GENERAL_BILINEAR_FLAGS | FAST_PATH_ ## repeat ## _REPEAT, \
+ bits_image_fetch_bilinear_affine_ ## name, \
+ _pixman_image_get_scanline_generic_64 \
+ },
+
+#define NEAREST_AFFINE_FAST_PATH(name, format, repeat) \
+ { PIXMAN_ ## format, \
+ GENERAL_NEAREST_FLAGS | FAST_PATH_ ## repeat ## _REPEAT, \
+ bits_image_fetch_nearest_affine_ ## name, \
+ _pixman_image_get_scanline_generic_64 \
+ },
+
+#define AFFINE_FAST_PATHS(name, format, repeat) \
+ BILINEAR_AFFINE_FAST_PATH(name, format, repeat) \
+ NEAREST_AFFINE_FAST_PATH(name, format, repeat)
+
+ AFFINE_FAST_PATHS (pad_a8r8g8b8, a8r8g8b8, PAD)
+ AFFINE_FAST_PATHS (none_a8r8g8b8, a8r8g8b8, NONE)
+ AFFINE_FAST_PATHS (reflect_a8r8g8b8, a8r8g8b8, REFLECT)
+ AFFINE_FAST_PATHS (normal_a8r8g8b8, a8r8g8b8, NORMAL)
+ AFFINE_FAST_PATHS (pad_x8r8g8b8, x8r8g8b8, PAD)
+ AFFINE_FAST_PATHS (none_x8r8g8b8, x8r8g8b8, NONE)
+ AFFINE_FAST_PATHS (reflect_x8r8g8b8, x8r8g8b8, REFLECT)
+ AFFINE_FAST_PATHS (normal_x8r8g8b8, x8r8g8b8, NORMAL)
+ AFFINE_FAST_PATHS (pad_a8, a8, PAD)
+ AFFINE_FAST_PATHS (none_a8, a8, NONE)
+ AFFINE_FAST_PATHS (reflect_a8, a8, REFLECT)
+ AFFINE_FAST_PATHS (normal_a8, a8, NORMAL)
+ AFFINE_FAST_PATHS (pad_r5g6b5, r5g6b5, PAD)
+ AFFINE_FAST_PATHS (none_r5g6b5, r5g6b5, NONE)
+ AFFINE_FAST_PATHS (reflect_r5g6b5, r5g6b5, REFLECT)
+ AFFINE_FAST_PATHS (normal_r5g6b5, r5g6b5, NORMAL)
+
+ /* Affine, no alpha */
+ { PIXMAN_any,
+ (FAST_PATH_NO_ALPHA_MAP | FAST_PATH_HAS_TRANSFORM | FAST_PATH_AFFINE_TRANSFORM),
+ bits_image_fetch_affine_no_alpha,
+ _pixman_image_get_scanline_generic_64
+ },
+
+ /* General */
+ { PIXMAN_any, 0, bits_image_fetch_general, _pixman_image_get_scanline_generic_64 },
+
+ { PIXMAN_null },
+};
+
+static void
+bits_image_property_changed (pixman_image_t *image)
+{
+ uint32_t flags = image->common.flags;
+ pixman_format_code_t format = image->common.extended_format_code;
+ const fetcher_info_t *info;
+
+ _pixman_bits_image_setup_accessors (&image->bits);
+
+ info = fetcher_info;
+ while (info->format != PIXMAN_null)
+ {
+ if ((info->format == format || info->format == PIXMAN_any) &&
+ (info->flags & flags) == info->flags)
+ {
+ image->bits.get_scanline_32 = info->fetch_32;
+ image->bits.get_scanline_64 = info->fetch_64;
+ break;
+ }
+
+ info++;
+ }
+}
+
+static uint32_t *
+src_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
+{
+ iter->image->bits.get_scanline_32 (
+ iter->image, iter->x, iter->y++, iter->width, iter->buffer, mask);
+
+ return iter->buffer;
+}
+
+static uint32_t *
+src_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask)
+{
+ iter->image->bits.get_scanline_64 (
+ iter->image, iter->x, iter->y++, iter->width, iter->buffer, mask);
+
+ return iter->buffer;
+}
+
+void
+_pixman_bits_image_src_iter_init (pixman_image_t *image, pixman_iter_t *iter)
+{
+ if (iter->flags & ITER_NARROW)
+ iter->get_scanline = src_get_scanline_narrow;
+ else
+ iter->get_scanline = src_get_scanline_wide;
+}
+
+static uint32_t *
+dest_get_scanline_narrow (pixman_iter_t *iter, const uint32_t *mask)
+{
+ pixman_image_t *image = iter->image;
+ int x = iter->x;
+ int y = iter->y;
+ int width = iter->width;
+ uint32_t * buffer = iter->buffer;
+
+ image->bits.fetch_scanline_32 (image, x, y, width, buffer, mask);
+ if (image->common.alpha_map)
+ {
+ x -= image->common.alpha_origin_x;
+ y -= image->common.alpha_origin_y;
+
+ image->common.alpha_map->fetch_scanline_32 (
+ (pixman_image_t *)image->common.alpha_map,
+ x, y, width, buffer, mask);
+ }
+
+ return iter->buffer;
+}
+
+static uint32_t *
+dest_get_scanline_wide (pixman_iter_t *iter, const uint32_t *mask)
+{
+ bits_image_t * image = &iter->image->bits;
+ int x = iter->x;
+ int y = iter->y;
+ int width = iter->width;
+ uint32_t * buffer = iter->buffer;
+
+ image->fetch_scanline_64 (
+ (pixman_image_t *)image, x, y, width, buffer, mask);
+ if (image->common.alpha_map)
+ {
+ x -= image->common.alpha_origin_x;
+ y -= image->common.alpha_origin_y;
+
+ image->common.alpha_map->fetch_scanline_64 (
+ (pixman_image_t *)image->common.alpha_map, x, y, width, buffer, mask);
+ }
+
+ return iter->buffer;
+}
+
+static void
+dest_write_back_narrow (pixman_iter_t *iter)
+{
+ bits_image_t * image = &iter->image->bits;
+ int x = iter->x;
+ int y = iter->y;
+ int width = iter->width;
+ const uint32_t *buffer = iter->buffer;
+
+ image->store_scanline_32 (image, x, y, width, buffer);
+
+ if (image->common.alpha_map)
+ {
+ x -= image->common.alpha_origin_x;
+ y -= image->common.alpha_origin_y;
+
+ image->common.alpha_map->store_scanline_32 (
+ image->common.alpha_map, x, y, width, buffer);
+ }
+
+ iter->y++;
+}
+
+static void
+dest_write_back_wide (pixman_iter_t *iter)
+{
+ bits_image_t * image = &iter->image->bits;
+ int x = iter->x;
+ int y = iter->y;
+ int width = iter->width;
+ const uint32_t *buffer = iter->buffer;
+
+ image->store_scanline_64 (image, x, y, width, buffer);
+
+ if (image->common.alpha_map)
+ {
+ x -= image->common.alpha_origin_x;
+ y -= image->common.alpha_origin_y;
+
+ image->common.alpha_map->store_scanline_64 (
+ image->common.alpha_map, x, y, width, buffer);
+ }
+
+ iter->y++;
+}
+
+static void
+dest_write_back_direct (pixman_iter_t *iter)
+{
+ iter->buffer += iter->image->bits.rowstride;
+}
+
+void
+_pixman_bits_image_dest_iter_init (pixman_image_t *image, pixman_iter_t *iter)
+{
+ if (iter->flags & ITER_NARROW)
+ {
+ if (((image->common.flags &
+ (FAST_PATH_NO_ALPHA_MAP | FAST_PATH_NO_ACCESSORS)) ==
+ (FAST_PATH_NO_ALPHA_MAP | FAST_PATH_NO_ACCESSORS)) &&
+ (image->bits.format == PIXMAN_a8r8g8b8 ||
+ (image->bits.format == PIXMAN_x8r8g8b8 &&
+ (iter->flags & ITER_LOCALIZED_ALPHA))))
+ {
+ iter->buffer = image->bits.bits + iter->y * image->bits.rowstride + iter->x;
+
+ iter->get_scanline = _pixman_iter_get_scanline_noop;
+ iter->write_back = dest_write_back_direct;
+ }
+ else
+ {
+ if ((iter->flags & (ITER_IGNORE_RGB | ITER_IGNORE_ALPHA)) ==
+ (ITER_IGNORE_RGB | ITER_IGNORE_ALPHA))
+ {
+ iter->get_scanline = _pixman_iter_get_scanline_noop;
+ }
+ else
+ {
+ iter->get_scanline = dest_get_scanline_narrow;
+ }
+
+ iter->write_back = dest_write_back_narrow;
+ }
+ }
+ else
+ {
+ iter->get_scanline = dest_get_scanline_wide;
+ iter->write_back = dest_write_back_wide;
+ }
+}
+
+static uint32_t *
+create_bits (pixman_format_code_t format,
+ int width,
+ int height,
+ int * rowstride_bytes)
+{
+ int stride;
+ int buf_size;
+ int bpp;
+
+ /* what follows is a long-winded way, avoiding any possibility of integer
+ * overflows, of saying:
+ * stride = ((width * bpp + 0x1f) >> 5) * sizeof (uint32_t);
+ */
+
+ bpp = PIXMAN_FORMAT_BPP (format);
+ if (pixman_multiply_overflows_int (width, bpp))
+ return NULL;
+
+ stride = width * bpp;
+ if (pixman_addition_overflows_int (stride, 0x1f))
+ return NULL;
+
+ stride += 0x1f;
+ stride >>= 5;
+
+ stride *= sizeof (uint32_t);
+
+ if (pixman_multiply_overflows_int (height, stride))
+ return NULL;
+
+ buf_size = height * stride;
+
+ if (rowstride_bytes)
+ *rowstride_bytes = stride;
+
+ return calloc (buf_size, 1);
+}
+
+PIXMAN_EXPORT pixman_image_t *
+pixman_image_create_bits (pixman_format_code_t format,
+ int width,
+ int height,
+ uint32_t * bits,
+ int rowstride_bytes)
+{
+ pixman_image_t *image;
+ uint32_t *free_me = NULL;
+
+ /* must be a whole number of uint32_t's
+ */
+ return_val_if_fail (
+ bits == NULL || (rowstride_bytes % sizeof (uint32_t)) == 0, NULL);
+
+ return_val_if_fail (PIXMAN_FORMAT_BPP (format) >= PIXMAN_FORMAT_DEPTH (format), NULL);
+
+ if (!bits && width && height)
+ {
+ free_me = bits = create_bits (format, width, height, &rowstride_bytes);
+ if (!bits)
+ return NULL;
+ }
+
+ image = _pixman_image_allocate ();
+
+ if (!image)
+ {
+ if (free_me)
+ free (free_me);
+
+ return NULL;
+ }
+
+ image->type = BITS;
+ image->bits.format = format;
+ image->bits.width = width;
+ image->bits.height = height;
+ image->bits.bits = bits;
+ image->bits.free_me = free_me;
+ image->bits.read_func = NULL;
+ image->bits.write_func = NULL;
+
+ /* The rowstride is stored in number of uint32_t */
+ image->bits.rowstride = rowstride_bytes / (int) sizeof (uint32_t);
+
+ image->bits.indexed = NULL;
+
+ image->common.property_changed = bits_image_property_changed;
+
+ _pixman_image_reset_clip_region (image);
+
+ return image;
+}
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