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Diffstat (limited to 'pixman/pixman/pixman.c')
| -rw-r--r-- | pixman/pixman/pixman.c | 536 |
1 files changed, 536 insertions, 0 deletions
diff --git a/pixman/pixman/pixman.c b/pixman/pixman/pixman.c new file mode 100644 index 000000000..12b4c5ac1 --- /dev/null +++ b/pixman/pixman/pixman.c @@ -0,0 +1,536 @@ +/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */ +/* + * Copyright © 2000 SuSE, Inc. + * Copyright © 2007 Red Hat, Inc. + * + * 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 SuSE not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. SuSE makes no representations about the + * suitability of this software for any purpose. It is provided "as is" + * without express or implied warranty. + * + * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE + * 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. + * + * Author: Keith Packard, SuSE, Inc. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include "pixman-private.h" + +/* + * Operator optimizations based on source or destination opacity + */ +typedef struct +{ + pixman_op_t op; + pixman_op_t op_src_dst_opaque; + pixman_op_t op_src_opaque; + pixman_op_t op_dst_opaque; +} optimized_operator_info_t; + +static const optimized_operator_info_t optimized_operators[] = +{ + /* Input Operator SRC&DST Opaque SRC Opaque DST Opaque */ + { PIXMAN_OP_OVER, PIXMAN_OP_SRC, PIXMAN_OP_SRC, PIXMAN_OP_OVER }, + { PIXMAN_OP_OVER_REVERSE, PIXMAN_OP_DST, PIXMAN_OP_OVER_REVERSE, PIXMAN_OP_DST }, + { PIXMAN_OP_IN, PIXMAN_OP_SRC, PIXMAN_OP_IN, PIXMAN_OP_SRC }, + { PIXMAN_OP_IN_REVERSE, PIXMAN_OP_DST, PIXMAN_OP_DST, PIXMAN_OP_IN_REVERSE }, + { PIXMAN_OP_OUT, PIXMAN_OP_CLEAR, PIXMAN_OP_OUT, PIXMAN_OP_CLEAR }, + { PIXMAN_OP_OUT_REVERSE, PIXMAN_OP_CLEAR, PIXMAN_OP_CLEAR, PIXMAN_OP_OUT_REVERSE }, + { PIXMAN_OP_ATOP, PIXMAN_OP_SRC, PIXMAN_OP_IN, PIXMAN_OP_OVER }, + { PIXMAN_OP_ATOP_REVERSE, PIXMAN_OP_DST, PIXMAN_OP_OVER_REVERSE, PIXMAN_OP_IN_REVERSE }, + { PIXMAN_OP_XOR, PIXMAN_OP_CLEAR, PIXMAN_OP_OUT, PIXMAN_OP_OUT_REVERSE }, + { PIXMAN_OP_SATURATE, PIXMAN_OP_DST, PIXMAN_OP_OVER_REVERSE, PIXMAN_OP_DST }, + { PIXMAN_OP_NONE } +}; + +static pixman_implementation_t *imp; + +/* + * Check if the current operator could be optimized + */ +static const optimized_operator_info_t* +pixman_operator_can_be_optimized (pixman_op_t op) +{ + const optimized_operator_info_t *info; + + for (info = optimized_operators; info->op != PIXMAN_OP_NONE; info++) + { + if (info->op == op) + return info; + } + return NULL; +} + +/* + * Optimize the current operator based on opacity of source or destination + * The output operator should be mathematically equivalent to the source. + */ +static pixman_op_t +pixman_optimize_operator (pixman_op_t op, + pixman_image_t *src_image, + pixman_image_t *mask_image, + pixman_image_t *dst_image) +{ + pixman_bool_t is_source_opaque; + pixman_bool_t is_dest_opaque; + const optimized_operator_info_t *info = pixman_operator_can_be_optimized (op); + + if (!info || mask_image) + return op; + + is_source_opaque = _pixman_image_is_opaque (src_image); + is_dest_opaque = _pixman_image_is_opaque (dst_image); + + if (is_source_opaque == FALSE && is_dest_opaque == FALSE) + return op; + + if (is_source_opaque && is_dest_opaque) + return info->op_src_dst_opaque; + else if (is_source_opaque) + return info->op_src_opaque; + else if (is_dest_opaque) + return info->op_dst_opaque; + + return op; + +} + +static void +apply_workaround (pixman_image_t *image, + int16_t * x, + int16_t * y, + uint32_t ** save_bits, + int * save_dx, + int * save_dy) +{ + /* Some X servers generate images that point to the + * wrong place in memory, but then set the clip region + * to point to the right place. Because of an old bug + * in pixman, this would actually work. + * + * Here we try and undo the damage + */ + int bpp = PIXMAN_FORMAT_BPP (image->bits.format) / 8; + pixman_box32_t *extents; + uint8_t *t; + int dx, dy; + + extents = pixman_region32_extents (&(image->common.clip_region)); + dx = extents->x1; + dy = extents->y1; + + *save_bits = image->bits.bits; + + *x -= dx; + *y -= dy; + pixman_region32_translate (&(image->common.clip_region), -dx, -dy); + + t = (uint8_t *)image->bits.bits; + t += dy * image->bits.rowstride * 4 + dx * bpp; + image->bits.bits = (uint32_t *)t; + + *save_dx = dx; + *save_dy = dy; +} + +static void +unapply_workaround (pixman_image_t *image, uint32_t *bits, int dx, int dy) +{ + image->bits.bits = bits; + pixman_region32_translate (&image->common.clip_region, dx, dy); +} + +PIXMAN_EXPORT void +pixman_image_composite (pixman_op_t op, + pixman_image_t * src, + pixman_image_t * mask, + pixman_image_t * dest, + int16_t src_x, + int16_t src_y, + int16_t mask_x, + int16_t mask_y, + int16_t dest_x, + int16_t dest_y, + uint16_t width, + uint16_t height) +{ + uint32_t *src_bits; + int src_dx, src_dy; + uint32_t *mask_bits; + int mask_dx, mask_dy; + uint32_t *dest_bits; + int dest_dx, dest_dy; + + /* + * Check if we can replace our operator by a simpler one + * if the src or dest are opaque. The output operator should be + * mathematically equivalent to the source. + */ + op = pixman_optimize_operator(op, src, mask, dest); + if (op == PIXMAN_OP_DST || + op == PIXMAN_OP_CONJOINT_DST || + op == PIXMAN_OP_DISJOINT_DST) + { + return; + } + + if (!imp) + imp = _pixman_choose_implementation (); + + if (src->common.need_workaround) + apply_workaround (src, &src_x, &src_y, &src_bits, &src_dx, &src_dy); + if (mask && mask->common.need_workaround) + apply_workaround (mask, &mask_x, &mask_y, &mask_bits, &mask_dx, &mask_dy); + if (dest->common.need_workaround) + apply_workaround (dest, &dest_x, &dest_y, &dest_bits, &dest_dx, &dest_dy); + + _pixman_implementation_composite (imp, op, + src, mask, dest, + src_x, src_y, + mask_x, mask_y, + dest_x, dest_y, + width, height); + + if (src->common.need_workaround) + unapply_workaround (src, src_bits, src_dx, src_dy); + if (mask && mask->common.need_workaround) + unapply_workaround (mask, mask_bits, mask_dx, mask_dy); + if (dest->common.need_workaround) + unapply_workaround (dest, dest_bits, dest_dx, dest_dy); +} + +PIXMAN_EXPORT pixman_bool_t +pixman_blt (uint32_t *src_bits, + uint32_t *dst_bits, + int src_stride, + int dst_stride, + int src_bpp, + int dst_bpp, + int src_x, + int src_y, + int dst_x, + int dst_y, + int width, + int height) +{ + if (!imp) + imp = _pixman_choose_implementation (); + + return _pixman_implementation_blt (imp, src_bits, dst_bits, src_stride, dst_stride, + src_bpp, dst_bpp, + src_x, src_y, + dst_x, dst_y, + width, height); +} + +PIXMAN_EXPORT pixman_bool_t +pixman_fill (uint32_t *bits, + int stride, + int bpp, + int x, + int y, + int width, + int height, + uint32_t xor) +{ + if (!imp) + imp = _pixman_choose_implementation (); + + return _pixman_implementation_fill (imp, bits, stride, bpp, x, y, width, height, xor); +} + +static uint32_t +color_to_uint32 (const pixman_color_t *color) +{ + return + (color->alpha >> 8 << 24) | + (color->red >> 8 << 16) | + (color->green & 0xff00) | + (color->blue >> 8); +} + +static pixman_bool_t +color_to_pixel (pixman_color_t * color, + uint32_t * pixel, + pixman_format_code_t format) +{ + uint32_t c = color_to_uint32 (color); + + if (!(format == PIXMAN_a8r8g8b8 || + format == PIXMAN_x8r8g8b8 || + format == PIXMAN_a8b8g8r8 || + format == PIXMAN_x8b8g8r8 || + format == PIXMAN_b8g8r8a8 || + format == PIXMAN_b8g8r8x8 || + format == PIXMAN_r5g6b5 || + format == PIXMAN_b5g6r5 || + format == PIXMAN_a8)) + { + return FALSE; + } + + if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_ABGR) + { + c = ((c & 0xff000000) >> 0) | + ((c & 0x00ff0000) >> 16) | + ((c & 0x0000ff00) >> 0) | + ((c & 0x000000ff) << 16); + } + if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_BGRA) + { + c = ((c & 0xff000000) >> 24) | + ((c & 0x00ff0000) >> 8) | + ((c & 0x0000ff00) << 8) | + ((c & 0x000000ff) << 24); + } + + if (format == PIXMAN_a8) + c = c >> 24; + else if (format == PIXMAN_r5g6b5 || + format == PIXMAN_b5g6r5) + c = CONVERT_8888_TO_0565 (c); + +#if 0 + printf ("color: %x %x %x %x\n", color->alpha, color->red, color->green, color->blue); + printf ("pixel: %x\n", c); +#endif + + *pixel = c; + return TRUE; +} + +PIXMAN_EXPORT pixman_bool_t +pixman_image_fill_rectangles (pixman_op_t op, + pixman_image_t * dest, + pixman_color_t * color, + int n_rects, + const pixman_rectangle16_t *rects) +{ + pixman_image_t *solid; + pixman_color_t c; + int i; + + if (color->alpha == 0xffff) + { + if (op == PIXMAN_OP_OVER) + op = PIXMAN_OP_SRC; + } + + if (op == PIXMAN_OP_CLEAR) + { + c.red = 0; + c.green = 0; + c.blue = 0; + c.alpha = 0; + + color = &c; + + op = PIXMAN_OP_SRC; + } + + if (op == PIXMAN_OP_SRC) + { + uint32_t pixel; + + if (color_to_pixel (color, &pixel, dest->bits.format)) + { + for (i = 0; i < n_rects; ++i) + { + pixman_region32_t fill_region; + int n_boxes, j; + pixman_box32_t *boxes; + + pixman_region32_init_rect (&fill_region, rects[i].x, rects[i].y, rects[i].width, rects[i].height); + + if (dest->common.have_clip_region) + { + if (!pixman_region32_intersect (&fill_region, + &fill_region, + &dest->common.clip_region)) + return FALSE; + } + + boxes = pixman_region32_rectangles (&fill_region, &n_boxes); + for (j = 0; j < n_boxes; ++j) + { + const pixman_box32_t *box = &(boxes[j]); + pixman_fill (dest->bits.bits, dest->bits.rowstride, PIXMAN_FORMAT_BPP (dest->bits.format), + box->x1, box->y1, box->x2 - box->x1, box->y2 - box->y1, + pixel); + } + + pixman_region32_fini (&fill_region); + } + return TRUE; + } + } + + solid = pixman_image_create_solid_fill (color); + if (!solid) + return FALSE; + + for (i = 0; i < n_rects; ++i) + { + const pixman_rectangle16_t *rect = &(rects[i]); + + pixman_image_composite (op, solid, NULL, dest, + 0, 0, 0, 0, + rect->x, rect->y, + rect->width, rect->height); + } + + pixman_image_unref (solid); + + return TRUE; +} + +/** + * pixman_version: + * + * Returns the version of the pixman library encoded in a single + * integer as per %PIXMAN_VERSION_ENCODE. The encoding ensures that + * later versions compare greater than earlier versions. + * + * A run-time comparison to check that pixman's version is greater than + * or equal to version X.Y.Z could be performed as follows: + * + * <informalexample><programlisting> + * if (pixman_version() >= PIXMAN_VERSION_ENCODE(X,Y,Z)) {...} + * </programlisting></informalexample> + * + * See also pixman_version_string() as well as the compile-time + * equivalents %PIXMAN_VERSION and %PIXMAN_VERSION_STRING. + * + * Return value: the encoded version. + **/ +PIXMAN_EXPORT int +pixman_version (void) +{ + return PIXMAN_VERSION; +} + +/** + * pixman_version_string: + * + * Returns the version of the pixman library as a human-readable string + * of the form "X.Y.Z". + * + * See also pixman_version() as well as the compile-time equivalents + * %PIXMAN_VERSION_STRING and %PIXMAN_VERSION. + * + * Return value: a string containing the version. + **/ +PIXMAN_EXPORT const char* +pixman_version_string (void) +{ + return PIXMAN_VERSION_STRING; +} + +/** + * pixman_format_supported_source: + * @format: A pixman_format_code_t format + * + * Return value: whether the provided format code is a supported + * format for a pixman surface used as a source in + * rendering. + * + * Currently, all pixman_format_code_t values are supported. + **/ +PIXMAN_EXPORT pixman_bool_t +pixman_format_supported_source (pixman_format_code_t format) +{ + switch (format) + { + /* 32 bpp formats */ + case PIXMAN_a2b10g10r10: + case PIXMAN_x2b10g10r10: + case PIXMAN_a2r10g10b10: + case PIXMAN_x2r10g10b10: + case PIXMAN_a8r8g8b8: + case PIXMAN_x8r8g8b8: + case PIXMAN_a8b8g8r8: + case PIXMAN_x8b8g8r8: + case PIXMAN_b8g8r8a8: + case PIXMAN_b8g8r8x8: + case PIXMAN_r8g8b8: + case PIXMAN_b8g8r8: + case PIXMAN_r5g6b5: + case PIXMAN_b5g6r5: + /* 16 bpp formats */ + case PIXMAN_a1r5g5b5: + case PIXMAN_x1r5g5b5: + case PIXMAN_a1b5g5r5: + case PIXMAN_x1b5g5r5: + case PIXMAN_a4r4g4b4: + case PIXMAN_x4r4g4b4: + case PIXMAN_a4b4g4r4: + case PIXMAN_x4b4g4r4: + /* 8bpp formats */ + case PIXMAN_a8: + case PIXMAN_r3g3b2: + case PIXMAN_b2g3r3: + case PIXMAN_a2r2g2b2: + case PIXMAN_a2b2g2r2: + case PIXMAN_c8: + case PIXMAN_g8: + case PIXMAN_x4a4: + /* Collides with PIXMAN_c8 + case PIXMAN_x4c4: + */ + /* Collides with PIXMAN_g8 + case PIXMAN_x4g4: + */ + /* 4bpp formats */ + case PIXMAN_a4: + case PIXMAN_r1g2b1: + case PIXMAN_b1g2r1: + case PIXMAN_a1r1g1b1: + case PIXMAN_a1b1g1r1: + case PIXMAN_c4: + case PIXMAN_g4: + /* 1bpp formats */ + case PIXMAN_a1: + case PIXMAN_g1: + /* YUV formats */ + case PIXMAN_yuy2: + case PIXMAN_yv12: + return TRUE; + + default: + return FALSE; + } +} + +/** + * pixman_format_supported_destination: + * @format: A pixman_format_code_t format + * + * Return value: whether the provided format code is a supported + * format for a pixman surface used as a destination in + * rendering. + * + * Currently, all pixman_format_code_t values are supported + * except for the YUV formats. + **/ +PIXMAN_EXPORT pixman_bool_t +pixman_format_supported_destination (pixman_format_code_t format) +{ + /* YUV formats cannot be written to at the moment */ + if (format == PIXMAN_yuy2 || format == PIXMAN_yv12) + return FALSE; + + return pixman_format_supported_source (format); +} + |