diff options
Diffstat (limited to 'src/gallium/state_trackers/wgl/shared/stw_arbpixelformat.c')
| -rw-r--r-- | src/gallium/state_trackers/wgl/shared/stw_arbpixelformat.c | 483 |
1 files changed, 483 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/wgl/shared/stw_arbpixelformat.c b/src/gallium/state_trackers/wgl/shared/stw_arbpixelformat.c new file mode 100644 index 0000000000..0e2d407699 --- /dev/null +++ b/src/gallium/state_trackers/wgl/shared/stw_arbpixelformat.c @@ -0,0 +1,483 @@ +/************************************************************************** + * + * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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. + * + **************************************************************************/ + +/** + * @file + * + * WGL_ARB_pixel_format extension implementation. + * + * @sa http://www.opengl.org/registry/specs/ARB/wgl_pixel_format.txt + */ + + +#include <windows.h> + +#define WGL_WGLEXT_PROTOTYPES + +#include <GL/gl.h> +#include <GL/wglext.h> + +#include "pipe/p_compiler.h" +#include "util/u_memory.h" +#include "stw_public.h" +#include "stw_pixelformat.h" + + +static boolean +stw_query_attrib( + int iPixelFormat, + int iLayerPlane, + int attrib, + int *pvalue ) +{ + uint count; + uint index; + const struct stw_pixelformat_info *pfi; + + count = stw_pixelformat_get_extended_count(); + + if (attrib == WGL_NUMBER_PIXEL_FORMATS_ARB) { + *pvalue = (int) count; + return TRUE; + } + + index = (uint) iPixelFormat - 1; + if (index >= count) + return FALSE; + + pfi = stw_pixelformat_get_info( index ); + + switch (attrib) { + case WGL_DRAW_TO_WINDOW_ARB: + *pvalue = pfi->pfd.dwFlags & PFD_DRAW_TO_WINDOW ? TRUE : FALSE; + return TRUE; + + case WGL_DRAW_TO_BITMAP_ARB: + *pvalue = pfi->pfd.dwFlags & PFD_DRAW_TO_BITMAP ? TRUE : FALSE; + return TRUE; + + case WGL_NEED_PALETTE_ARB: + *pvalue = pfi->pfd.dwFlags & PFD_NEED_PALETTE ? TRUE : FALSE; + return TRUE; + + case WGL_NEED_SYSTEM_PALETTE_ARB: + *pvalue = pfi->pfd.dwFlags & PFD_NEED_SYSTEM_PALETTE ? TRUE : FALSE; + return TRUE; + + case WGL_SWAP_METHOD_ARB: + *pvalue = pfi->pfd.dwFlags & PFD_SWAP_COPY ? WGL_SWAP_COPY_ARB : WGL_SWAP_UNDEFINED_ARB; + return TRUE; + + case WGL_SWAP_LAYER_BUFFERS_ARB: + *pvalue = FALSE; + return TRUE; + + case WGL_NUMBER_OVERLAYS_ARB: + *pvalue = 0; + return TRUE; + + case WGL_NUMBER_UNDERLAYS_ARB: + *pvalue = 0; + return TRUE; + } + + if (iLayerPlane != 0) + return FALSE; + + switch (attrib) { + case WGL_ACCELERATION_ARB: + *pvalue = WGL_FULL_ACCELERATION_ARB; + break; + + case WGL_TRANSPARENT_ARB: + *pvalue = FALSE; + break; + + case WGL_TRANSPARENT_RED_VALUE_ARB: + case WGL_TRANSPARENT_GREEN_VALUE_ARB: + case WGL_TRANSPARENT_BLUE_VALUE_ARB: + case WGL_TRANSPARENT_ALPHA_VALUE_ARB: + case WGL_TRANSPARENT_INDEX_VALUE_ARB: + break; + + case WGL_SHARE_DEPTH_ARB: + case WGL_SHARE_STENCIL_ARB: + case WGL_SHARE_ACCUM_ARB: + *pvalue = TRUE; + break; + + case WGL_SUPPORT_GDI_ARB: + *pvalue = pfi->pfd.dwFlags & PFD_SUPPORT_GDI ? TRUE : FALSE; + break; + + case WGL_SUPPORT_OPENGL_ARB: + *pvalue = pfi->pfd.dwFlags & PFD_SUPPORT_OPENGL ? TRUE : FALSE; + break; + + case WGL_DOUBLE_BUFFER_ARB: + *pvalue = pfi->pfd.dwFlags & PFD_DOUBLEBUFFER ? TRUE : FALSE; + break; + + case WGL_STEREO_ARB: + *pvalue = pfi->pfd.dwFlags & PFD_STEREO ? TRUE : FALSE; + break; + + case WGL_PIXEL_TYPE_ARB: + switch (pfi->pfd.iPixelType) { + case PFD_TYPE_RGBA: + *pvalue = WGL_TYPE_RGBA_ARB; + break; + case PFD_TYPE_COLORINDEX: + *pvalue = WGL_TYPE_COLORINDEX_ARB; + break; + default: + return FALSE; + } + break; + + case WGL_COLOR_BITS_ARB: + *pvalue = pfi->pfd.cColorBits; + break; + + case WGL_RED_BITS_ARB: + *pvalue = pfi->pfd.cRedBits; + break; + + case WGL_RED_SHIFT_ARB: + *pvalue = pfi->pfd.cRedShift; + break; + + case WGL_GREEN_BITS_ARB: + *pvalue = pfi->pfd.cGreenBits; + break; + + case WGL_GREEN_SHIFT_ARB: + *pvalue = pfi->pfd.cGreenShift; + break; + + case WGL_BLUE_BITS_ARB: + *pvalue = pfi->pfd.cBlueBits; + break; + + case WGL_BLUE_SHIFT_ARB: + *pvalue = pfi->pfd.cBlueShift; + break; + + case WGL_ALPHA_BITS_ARB: + *pvalue = pfi->pfd.cAlphaBits; + break; + + case WGL_ALPHA_SHIFT_ARB: + *pvalue = pfi->pfd.cAlphaShift; + break; + + case WGL_ACCUM_BITS_ARB: + *pvalue = pfi->pfd.cAccumBits; + break; + + case WGL_ACCUM_RED_BITS_ARB: + *pvalue = pfi->pfd.cAccumRedBits; + break; + + case WGL_ACCUM_GREEN_BITS_ARB: + *pvalue = pfi->pfd.cAccumGreenBits; + break; + + case WGL_ACCUM_BLUE_BITS_ARB: + *pvalue = pfi->pfd.cAccumBlueBits; + break; + + case WGL_ACCUM_ALPHA_BITS_ARB: + *pvalue = pfi->pfd.cAccumAlphaBits; + break; + + case WGL_DEPTH_BITS_ARB: + *pvalue = pfi->pfd.cDepthBits; + break; + + case WGL_STENCIL_BITS_ARB: + *pvalue = pfi->pfd.cStencilBits; + break; + + case WGL_AUX_BUFFERS_ARB: + *pvalue = pfi->pfd.cAuxBuffers; + break; + + case WGL_SAMPLE_BUFFERS_ARB: + *pvalue = pfi->numSampleBuffers; + break; + + case WGL_SAMPLES_ARB: + *pvalue = pfi->numSamples; + break; + + default: + return FALSE; + } + + return TRUE; +} + +struct attrib_match_info +{ + int attribute; + int weight; + BOOL exact; +}; + +static const struct attrib_match_info attrib_match[] = { + + /* WGL_ARB_pixel_format */ + { WGL_DRAW_TO_WINDOW_ARB, 0, TRUE }, + { WGL_DRAW_TO_BITMAP_ARB, 0, TRUE }, + { WGL_ACCELERATION_ARB, 0, TRUE }, + { WGL_NEED_PALETTE_ARB, 0, TRUE }, + { WGL_NEED_SYSTEM_PALETTE_ARB, 0, TRUE }, + { WGL_SWAP_LAYER_BUFFERS_ARB, 0, TRUE }, + { WGL_SWAP_METHOD_ARB, 0, TRUE }, + { WGL_NUMBER_OVERLAYS_ARB, 4, FALSE }, + { WGL_NUMBER_UNDERLAYS_ARB, 4, FALSE }, + /*{ WGL_SHARE_DEPTH_ARB, 0, TRUE },*/ /* no overlays -- ignore */ + /*{ WGL_SHARE_STENCIL_ARB, 0, TRUE },*/ /* no overlays -- ignore */ + /*{ WGL_SHARE_ACCUM_ARB, 0, TRUE },*/ /* no overlays -- ignore */ + { WGL_SUPPORT_GDI_ARB, 0, TRUE }, + { WGL_SUPPORT_OPENGL_ARB, 0, TRUE }, + { WGL_DOUBLE_BUFFER_ARB, 0, TRUE }, + { WGL_STEREO_ARB, 0, TRUE }, + { WGL_PIXEL_TYPE_ARB, 0, TRUE }, + { WGL_COLOR_BITS_ARB, 1, FALSE }, + { WGL_RED_BITS_ARB, 1, FALSE }, + { WGL_GREEN_BITS_ARB, 1, FALSE }, + { WGL_BLUE_BITS_ARB, 1, FALSE }, + { WGL_ALPHA_BITS_ARB, 1, FALSE }, + { WGL_ACCUM_BITS_ARB, 1, FALSE }, + { WGL_ACCUM_RED_BITS_ARB, 1, FALSE }, + { WGL_ACCUM_GREEN_BITS_ARB, 1, FALSE }, + { WGL_ACCUM_BLUE_BITS_ARB, 1, FALSE }, + { WGL_ACCUM_ALPHA_BITS_ARB, 1, FALSE }, + { WGL_DEPTH_BITS_ARB, 1, FALSE }, + { WGL_STENCIL_BITS_ARB, 1, FALSE }, + { WGL_AUX_BUFFERS_ARB, 2, FALSE }, + + /* WGL_ARB_multisample */ + { WGL_SAMPLE_BUFFERS_ARB, 2, FALSE }, + { WGL_SAMPLES_ARB, 2, FALSE } +}; + +struct stw_pixelformat_score +{ + int points; + uint index; +}; + +static BOOL +score_pixelformats( + struct stw_pixelformat_score *scores, + uint count, + int attribute, + int expected_value ) +{ + uint i; + const struct attrib_match_info *ami = NULL; + uint index; + + /* Find out if a given attribute should be considered for score calculation. + */ + for (i = 0; i < sizeof( attrib_match ) / sizeof( attrib_match[0] ); i++) { + if (attrib_match[i].attribute == attribute) { + ami = &attrib_match[i]; + break; + } + } + if (ami == NULL) + return TRUE; + + /* Iterate all pixelformats, query the requested attribute and calculate + * score points. + */ + for (index = 0; index < count; index++) { + int actual_value; + + if (!stw_query_attrib( index + 1, 0, attribute, &actual_value )) + return FALSE; + + if (ami->exact) { + /* For an exact match criteria, if the actual and expected values differ, + * the score is set to 0 points, effectively removing the pixelformat + * from a list of matching pixelformats. + */ + if (actual_value != expected_value) + scores[index].points = 0; + } + else { + /* For a minimum match criteria, if the actual value is smaller than the expected + * value, the pixelformat is rejected (score set to 0). However, if the actual + * value is bigger, the pixelformat is given a penalty to favour pixelformats that + * more closely match the expected values. + */ + if (actual_value < expected_value) + scores[index].points = 0; + else if (actual_value > expected_value) + scores[index].points -= (actual_value - expected_value) * ami->weight; + } + } + + return TRUE; +} + +WINGDIAPI BOOL APIENTRY +wglChoosePixelFormatARB( + HDC hdc, + const int *piAttribIList, + const FLOAT *pfAttribFList, + UINT nMaxFormats, + int *piFormats, + UINT *nNumFormats ) +{ + uint count; + struct stw_pixelformat_score *scores; + uint i; + + *nNumFormats = 0; + + /* Allocate and initialize pixelformat score table -- better matches + * have higher scores. Start with a high score and take out penalty + * points for a mismatch when the match does not have to be exact. + * Set a score to 0 if there is a mismatch for an exact match criteria. + */ + count = stw_pixelformat_get_extended_count(); + scores = (struct stw_pixelformat_score *) MALLOC( count * sizeof( struct stw_pixelformat_score ) ); + if (scores == NULL) + return FALSE; + for (i = 0; i < count; i++) { + scores[i].points = 0x7fffffff; + scores[i].index = i; + } + + /* Given the attribute list calculate a score for each pixelformat. + */ + if (piAttribIList != NULL) { + while (*piAttribIList != 0) { + if (!score_pixelformats( scores, count, piAttribIList[0], piAttribIList[1] )) { + FREE( scores ); + return FALSE; + } + piAttribIList += 2; + } + } + if (pfAttribFList != NULL) { + while (*pfAttribFList != 0) { + if (!score_pixelformats( scores, count, (int) pfAttribFList[0], (int) pfAttribFList[1] )) { + FREE( scores ); + return FALSE; + } + pfAttribFList += 2; + } + } + + /* Bubble-sort the resulting scores. Pixelformats with higher scores go first. + * TODO: Find out if there are any patent issues with it. + */ + if (count > 1) { + uint n = count; + boolean swapped; + + do { + swapped = FALSE; + for (i = 1; i < n; i++) { + if (scores[i - 1].points < scores[i].points) { + struct stw_pixelformat_score score = scores[i - 1]; + + scores[i - 1] = scores[i]; + scores[i] = score; + swapped = TRUE; + } + } + n--; + } + while (swapped); + } + + /* Return a list of pixelformats that are the best match. + * Reject pixelformats with non-positive scores. + */ + for (i = 0; i < count; i++) { + if (scores[i].points > 0) { + if (*nNumFormats < nMaxFormats) + piFormats[*nNumFormats] = scores[i].index + 1; + (*nNumFormats)++; + } + } + + FREE( scores ); + return TRUE; +} + +WINGDIAPI BOOL APIENTRY +wglGetPixelFormatAttribfvARB( + HDC hdc, + int iPixelFormat, + int iLayerPlane, + UINT nAttributes, + const int *piAttributes, + FLOAT *pfValues ) +{ + UINT i; + + (void) hdc; + + for (i = 0; i < nAttributes; i++) { + int value; + + if (!stw_query_attrib( iPixelFormat, iLayerPlane, piAttributes[i], &value )) + return FALSE; + pfValues[i] = (FLOAT) value; + } + + return TRUE; +} + +WINGDIAPI BOOL APIENTRY +wglGetPixelFormatAttribivARB( + HDC hdc, + int iPixelFormat, + int iLayerPlane, + UINT nAttributes, + const int *piAttributes, + int *piValues ) +{ + UINT i; + + (void) hdc; + + for (i = 0; i < nAttributes; i++) { + if (!stw_query_attrib( iPixelFormat, iLayerPlane, piAttributes[i], &piValues[i] )) + return FALSE; + } + + return TRUE; +} |