diff options
Diffstat (limited to 'mesalib/src/mesa/drivers/dri/swrast/swrast_span.c')
| -rw-r--r-- | mesalib/src/mesa/drivers/dri/swrast/swrast_span.c | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/mesalib/src/mesa/drivers/dri/swrast/swrast_span.c b/mesalib/src/mesa/drivers/dri/swrast/swrast_span.c new file mode 100644 index 000000000..2d3c25dcb --- /dev/null +++ b/mesalib/src/mesa/drivers/dri/swrast/swrast_span.c @@ -0,0 +1,439 @@ +/* + * Mesa 3-D graphics library + * Version: 7.1 + * + * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/* + * Authors: + * George Sapountzis <gsap7@yahoo.gr> + */ + +#include "swrast_priv.h" + +#define YFLIP(_xrb, Y) ((_xrb)->Base.Height - (Y) - 1) + +/* + * Dithering support takes the "computation" extreme in the "computation vs. + * storage" trade-off. This approach is very simple to implement and any + * computational overhead should be acceptable. XMesa uses table lookups for + * around 8KB of storage overhead per visual. + */ +#define DITHER 1 + +static const GLubyte kernel[16] = { + 0*16, 8*16, 2*16, 10*16, + 12*16, 4*16, 14*16, 6*16, + 3*16, 11*16, 1*16, 9*16, + 15*16, 7*16, 13*16, 5*16, +}; + +#if DITHER +#define DITHER_COMP(X, Y) kernel[((X) & 0x3) | (((Y) & 0x3) << 2)] + +#define DITHER_CLAMP(X) (((X) < CHAN_MAX) ? (X) : CHAN_MAX) +#else +#define DITHER_COMP(X, Y) 0 + +#define DITHER_CLAMP(X) (X) +#endif + + +/* + * Pixel macros shared across front/back buffer span functions. + */ + +/* 32-bit BGRA */ +#define STORE_PIXEL_A8R8G8B8(DST, X, Y, VALUE) \ + DST[3] = VALUE[ACOMP]; \ + DST[2] = VALUE[RCOMP]; \ + DST[1] = VALUE[GCOMP]; \ + DST[0] = VALUE[BCOMP] +#define STORE_PIXEL_RGB_A8R8G8B8(DST, X, Y, VALUE) \ + DST[3] = 0xff; \ + DST[2] = VALUE[RCOMP]; \ + DST[1] = VALUE[GCOMP]; \ + DST[0] = VALUE[BCOMP] +#define FETCH_PIXEL_A8R8G8B8(DST, SRC) \ + DST[ACOMP] = SRC[3]; \ + DST[RCOMP] = SRC[2]; \ + DST[GCOMP] = SRC[1]; \ + DST[BCOMP] = SRC[0] + + +/* 32-bit BGRX */ +#define STORE_PIXEL_X8R8G8B8(DST, X, Y, VALUE) \ + DST[3] = 0xff; \ + DST[2] = VALUE[RCOMP]; \ + DST[1] = VALUE[GCOMP]; \ + DST[0] = VALUE[BCOMP] +#define STORE_PIXEL_RGB_X8R8G8B8(DST, X, Y, VALUE) \ + DST[3] = 0xff; \ + DST[2] = VALUE[RCOMP]; \ + DST[1] = VALUE[GCOMP]; \ + DST[0] = VALUE[BCOMP] +#define FETCH_PIXEL_X8R8G8B8(DST, SRC) \ + DST[ACOMP] = 0xff; \ + DST[RCOMP] = SRC[2]; \ + DST[GCOMP] = SRC[1]; \ + DST[BCOMP] = SRC[0] + + +/* 16-bit BGR */ +#define STORE_PIXEL_R5G6B5(DST, X, Y, VALUE) \ + do { \ + int d = DITHER_COMP(X, Y) >> 6; \ + GLushort *p = (GLushort *)DST; \ + *p = ( ((DITHER_CLAMP((VALUE[RCOMP]) + d) & 0xf8) << 8) | \ + ((DITHER_CLAMP((VALUE[GCOMP]) + d) & 0xfc) << 3) | \ + ((DITHER_CLAMP((VALUE[BCOMP]) + d) & 0xf8) >> 3) ); \ + } while(0) +#define FETCH_PIXEL_R5G6B5(DST, SRC) \ + do { \ + GLushort p = *(GLushort *)SRC; \ + DST[ACOMP] = 0xff; \ + DST[RCOMP] = ((p >> 8) & 0xf8) * 255 / 0xf8; \ + DST[GCOMP] = ((p >> 3) & 0xfc) * 255 / 0xfc; \ + DST[BCOMP] = ((p << 3) & 0xf8) * 255 / 0xf8; \ + } while(0) + + +/* 8-bit BGR */ +#define STORE_PIXEL_R3G3B2(DST, X, Y, VALUE) \ + do { \ + int d = DITHER_COMP(X, Y) >> 3; \ + GLubyte *p = (GLubyte *)DST; \ + *p = ( ((DITHER_CLAMP((VALUE[RCOMP]) + d) & 0xe0) >> 5) | \ + ((DITHER_CLAMP((VALUE[GCOMP]) + d) & 0xe0) >> 2) | \ + ((DITHER_CLAMP((VALUE[BCOMP]) + d) & 0xc0) >> 0) ); \ + } while(0) +#define FETCH_PIXEL_R3G3B2(DST, SRC) \ + do { \ + GLubyte p = *(GLubyte *)SRC; \ + DST[ACOMP] = 0xff; \ + DST[RCOMP] = ((p << 5) & 0xe0) * 255 / 0xe0; \ + DST[GCOMP] = ((p << 2) & 0xe0) * 255 / 0xe0; \ + DST[BCOMP] = ((p << 0) & 0xc0) * 255 / 0xc0; \ + } while(0) + + +/* + * Generate code for back-buffer span functions. + */ + +/* 32-bit BGRA */ +#define NAME(FUNC) FUNC##_A8R8G8B8 +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X) * 4; +#define INC_PIXEL_PTR(P) P += 4 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + STORE_PIXEL_A8R8G8B8(DST, X, Y, VALUE) +#define STORE_PIXEL_RGB(DST, X, Y, VALUE) \ + STORE_PIXEL_RGB_A8R8G8B8(DST, X, Y, VALUE) +#define FETCH_PIXEL(DST, SRC) \ + FETCH_PIXEL_A8R8G8B8(DST, SRC) + +#include "swrast/s_spantemp.h" + + +/* 32-bit BGRX */ +#define NAME(FUNC) FUNC##_X8R8G8B8 +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X) * 4; +#define INC_PIXEL_PTR(P) P += 4 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + STORE_PIXEL_X8R8G8B8(DST, X, Y, VALUE) +#define STORE_PIXEL_RGB(DST, X, Y, VALUE) \ + STORE_PIXEL_RGB_X8R8G8B8(DST, X, Y, VALUE) +#define FETCH_PIXEL(DST, SRC) \ + FETCH_PIXEL_X8R8G8B8(DST, SRC) + +#include "swrast/s_spantemp.h" + + +/* 16-bit BGR */ +#define NAME(FUNC) FUNC##_R5G6B5 +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X) * 2; +#define INC_PIXEL_PTR(P) P += 2 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + STORE_PIXEL_R5G6B5(DST, X, Y, VALUE) +#define FETCH_PIXEL(DST, SRC) \ + FETCH_PIXEL_R5G6B5(DST, SRC) + +#include "swrast/s_spantemp.h" + + +/* 8-bit BGR */ +#define NAME(FUNC) FUNC##_R3G3B2 +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X) * 1; +#define INC_PIXEL_PTR(P) P += 1 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + STORE_PIXEL_R3G3B2(DST, X, Y, VALUE) +#define FETCH_PIXEL(DST, SRC) \ + FETCH_PIXEL_R3G3B2(DST, SRC) + +#include "swrast/s_spantemp.h" + + +/* 8-bit color index */ +#define NAME(FUNC) FUNC##_CI8 +#define CI_MODE +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X); +#define INC_PIXEL_PTR(P) P += 1 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + *DST = VALUE[0] +#define FETCH_PIXEL(DST, SRC) \ + DST = SRC[0] + +#include "swrast/s_spantemp.h" + + +/* + * Generate code for front-buffer span functions. + */ + +/* 32-bit BGRA */ +#define NAME(FUNC) FUNC##_A8R8G8B8_front +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)row; +#define INC_PIXEL_PTR(P) P += 4 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + STORE_PIXEL_A8R8G8B8(DST, X, Y, VALUE) +#define STORE_PIXEL_RGB(DST, X, Y, VALUE) \ + STORE_PIXEL_RGB_A8R8G8B8(DST, X, Y, VALUE) +#define FETCH_PIXEL(DST, SRC) \ + FETCH_PIXEL_A8R8G8B8(DST, SRC) + +#include "swrast_spantemp.h" + + +/* 32-bit BGRX */ +#define NAME(FUNC) FUNC##_X8R8G8B8_front +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)row; +#define INC_PIXEL_PTR(P) P += 4 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + STORE_PIXEL_X8R8G8B8(DST, X, Y, VALUE) +#define STORE_PIXEL_RGB(DST, X, Y, VALUE) \ + STORE_PIXEL_RGB_X8R8G8B8(DST, X, Y, VALUE) +#define FETCH_PIXEL(DST, SRC) \ + FETCH_PIXEL_X8R8G8B8(DST, SRC) + +#include "swrast_spantemp.h" + + +/* 16-bit BGR */ +#define NAME(FUNC) FUNC##_R5G6B5_front +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)row; +#define INC_PIXEL_PTR(P) P += 2 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + STORE_PIXEL_R5G6B5(DST, X, Y, VALUE) +#define FETCH_PIXEL(DST, SRC) \ + FETCH_PIXEL_R5G6B5(DST, SRC) + +#include "swrast_spantemp.h" + + +/* 8-bit BGR */ +#define NAME(FUNC) FUNC##_R3G3B2_front +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)row; +#define INC_PIXEL_PTR(P) P += 1 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + STORE_PIXEL_R3G3B2(DST, X, Y, VALUE) +#define FETCH_PIXEL(DST, SRC) \ + FETCH_PIXEL_R3G3B2(DST, SRC) + +#include "swrast_spantemp.h" + + +/* 8-bit color index */ +#define NAME(FUNC) FUNC##_CI8_front +#define CI_MODE +#define RB_TYPE GLubyte +#define SPAN_VARS \ + struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb); +#define INIT_PIXEL_PTR(P, X, Y) \ + GLubyte *P = (GLubyte *)row; +#define INC_PIXEL_PTR(P) P += 1 +#define STORE_PIXEL(DST, X, Y, VALUE) \ + *DST = VALUE[0] +#define FETCH_PIXEL(DST, SRC) \ + DST = SRC[0] + +#include "swrast_spantemp.h" + + +/* + * Back-buffers are malloced memory and always private. + * + * BACK_PIXMAP (not supported) + * BACK_XIMAGE + */ +void +swrast_set_span_funcs_back(struct swrast_renderbuffer *xrb, + GLuint pixel_format) +{ + switch (pixel_format) { + case PF_A8R8G8B8: + xrb->Base.GetRow = get_row_A8R8G8B8; + xrb->Base.GetValues = get_values_A8R8G8B8; + xrb->Base.PutRow = put_row_A8R8G8B8; + xrb->Base.PutRowRGB = put_row_rgb_A8R8G8B8; + xrb->Base.PutMonoRow = put_mono_row_A8R8G8B8; + xrb->Base.PutValues = put_values_A8R8G8B8; + xrb->Base.PutMonoValues = put_mono_values_A8R8G8B8; + break; + case PF_X8R8G8B8: + xrb->Base.GetRow = get_row_X8R8G8B8; + xrb->Base.GetValues = get_values_X8R8G8B8; + xrb->Base.PutRow = put_row_X8R8G8B8; + xrb->Base.PutRowRGB = put_row_rgb_X8R8G8B8; + xrb->Base.PutMonoRow = put_mono_row_X8R8G8B8; + xrb->Base.PutValues = put_values_X8R8G8B8; + xrb->Base.PutMonoValues = put_mono_values_X8R8G8B8; + break; + case PF_R5G6B5: + xrb->Base.GetRow = get_row_R5G6B5; + xrb->Base.GetValues = get_values_R5G6B5; + xrb->Base.PutRow = put_row_R5G6B5; + xrb->Base.PutRowRGB = put_row_rgb_R5G6B5; + xrb->Base.PutMonoRow = put_mono_row_R5G6B5; + xrb->Base.PutValues = put_values_R5G6B5; + xrb->Base.PutMonoValues = put_mono_values_R5G6B5; + break; + case PF_R3G3B2: + xrb->Base.GetRow = get_row_R3G3B2; + xrb->Base.GetValues = get_values_R3G3B2; + xrb->Base.PutRow = put_row_R3G3B2; + xrb->Base.PutRowRGB = put_row_rgb_R3G3B2; + xrb->Base.PutMonoRow = put_mono_row_R3G3B2; + xrb->Base.PutValues = put_values_R3G3B2; + xrb->Base.PutMonoValues = put_mono_values_R3G3B2; + break; + case PF_CI8: + xrb->Base.GetRow = get_row_CI8; + xrb->Base.GetValues = get_values_CI8; + xrb->Base.PutRow = put_row_CI8; + xrb->Base.PutMonoRow = put_mono_row_CI8; + xrb->Base.PutValues = put_values_CI8; + xrb->Base.PutMonoValues = put_mono_values_CI8; + break; + default: + assert(0); + return; + } +} + + +/* + * Front-buffers are provided by the loader, the xorg loader uses pixmaps. + * + * WINDOW, An X window + * GLXWINDOW, GLX window + * PIXMAP, GLX pixmap + * PBUFFER GLX Pbuffer + */ +void +swrast_set_span_funcs_front(struct swrast_renderbuffer *xrb, + GLuint pixel_format) +{ + switch (pixel_format) { + case PF_A8R8G8B8: + xrb->Base.GetRow = get_row_A8R8G8B8_front; + xrb->Base.GetValues = get_values_A8R8G8B8_front; + xrb->Base.PutRow = put_row_A8R8G8B8_front; + xrb->Base.PutRowRGB = put_row_rgb_A8R8G8B8_front; + xrb->Base.PutMonoRow = put_mono_row_A8R8G8B8_front; + xrb->Base.PutValues = put_values_A8R8G8B8_front; + xrb->Base.PutMonoValues = put_mono_values_A8R8G8B8_front; + break; + case PF_X8R8G8B8: + xrb->Base.GetRow = get_row_X8R8G8B8_front; + xrb->Base.GetValues = get_values_X8R8G8B8_front; + xrb->Base.PutRow = put_row_X8R8G8B8_front; + xrb->Base.PutRowRGB = put_row_rgb_X8R8G8B8_front; + xrb->Base.PutMonoRow = put_mono_row_X8R8G8B8_front; + xrb->Base.PutValues = put_values_X8R8G8B8_front; + xrb->Base.PutMonoValues = put_mono_values_X8R8G8B8_front; + break; + case PF_R5G6B5: + xrb->Base.GetRow = get_row_R5G6B5_front; + xrb->Base.GetValues = get_values_R5G6B5_front; + xrb->Base.PutRow = put_row_R5G6B5_front; + xrb->Base.PutRowRGB = put_row_rgb_R5G6B5_front; + xrb->Base.PutMonoRow = put_mono_row_R5G6B5_front; + xrb->Base.PutValues = put_values_R5G6B5_front; + xrb->Base.PutMonoValues = put_mono_values_R5G6B5_front; + break; + case PF_R3G3B2: + xrb->Base.GetRow = get_row_R3G3B2_front; + xrb->Base.GetValues = get_values_R3G3B2_front; + xrb->Base.PutRow = put_row_R3G3B2_front; + xrb->Base.PutRowRGB = put_row_rgb_R3G3B2_front; + xrb->Base.PutMonoRow = put_mono_row_R3G3B2_front; + xrb->Base.PutValues = put_values_R3G3B2_front; + xrb->Base.PutMonoValues = put_mono_values_R3G3B2_front; + break; + case PF_CI8: + xrb->Base.GetRow = get_row_CI8_front; + xrb->Base.GetValues = get_values_CI8_front; + xrb->Base.PutRow = put_row_CI8_front; + xrb->Base.PutMonoRow = put_mono_row_CI8_front; + xrb->Base.PutValues = put_values_CI8_front; + xrb->Base.PutMonoValues = put_mono_values_CI8_front; + break; + default: + assert(0); + return; + } +} |