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Diffstat (limited to 'src/gallium/state_trackers/wgl/shared/stw_arbpixelformat.c')
-rw-r--r--src/gallium/state_trackers/wgl/shared/stw_arbpixelformat.c519
1 files changed, 519 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 00000000000..f5636354202
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+++ b/src/gallium/state_trackers/wgl/shared/stw_arbpixelformat.c
@@ -0,0 +1,519 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#include <windows.h>
+
+#include "pipe/p_compiler.h"
+#include "util/u_memory.h"
+#include "stw_public.h"
+#include "stw_pixelformat.h"
+#include "stw_arbpixelformat.h"
+
+#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
+#define WGL_DRAW_TO_WINDOW_ARB 0x2001
+#define WGL_DRAW_TO_BITMAP_ARB 0x2002
+#define WGL_ACCELERATION_ARB 0x2003
+#define WGL_NEED_PALETTE_ARB 0x2004
+#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005
+#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006
+#define WGL_SWAP_METHOD_ARB 0x2007
+#define WGL_NUMBER_OVERLAYS_ARB 0x2008
+#define WGL_NUMBER_UNDERLAYS_ARB 0x2009
+#define WGL_TRANSPARENT_ARB 0x200A
+#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037
+#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038
+#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039
+#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A
+#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B
+#define WGL_SHARE_DEPTH_ARB 0x200C
+#define WGL_SHARE_STENCIL_ARB 0x200D
+#define WGL_SHARE_ACCUM_ARB 0x200E
+#define WGL_SUPPORT_GDI_ARB 0x200F
+#define WGL_SUPPORT_OPENGL_ARB 0x2010
+#define WGL_DOUBLE_BUFFER_ARB 0x2011
+#define WGL_STEREO_ARB 0x2012
+#define WGL_PIXEL_TYPE_ARB 0x2013
+#define WGL_COLOR_BITS_ARB 0x2014
+#define WGL_RED_BITS_ARB 0x2015
+#define WGL_RED_SHIFT_ARB 0x2016
+#define WGL_GREEN_BITS_ARB 0x2017
+#define WGL_GREEN_SHIFT_ARB 0x2018
+#define WGL_BLUE_BITS_ARB 0x2019
+#define WGL_BLUE_SHIFT_ARB 0x201A
+#define WGL_ALPHA_BITS_ARB 0x201B
+#define WGL_ALPHA_SHIFT_ARB 0x201C
+#define WGL_ACCUM_BITS_ARB 0x201D
+#define WGL_ACCUM_RED_BITS_ARB 0x201E
+#define WGL_ACCUM_GREEN_BITS_ARB 0x201F
+#define WGL_ACCUM_BLUE_BITS_ARB 0x2020
+#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021
+#define WGL_DEPTH_BITS_ARB 0x2022
+#define WGL_STENCIL_BITS_ARB 0x2023
+#define WGL_AUX_BUFFERS_ARB 0x2024
+
+#define WGL_NO_ACCELERATION_ARB 0x2025
+#define WGL_GENERIC_ACCELERATION_ARB 0x2026
+#define WGL_FULL_ACCELERATION_ARB 0x2027
+
+#define WGL_SWAP_EXCHANGE_ARB 0x2028
+#define WGL_SWAP_COPY_ARB 0x2029
+#define WGL_SWAP_UNDEFINED_ARB 0x202A
+
+#define WGL_TYPE_RGBA_ARB 0x202B
+#define WGL_TYPE_COLORINDEX_ARB 0x202C
+
+/* From arb_multisample:
+ */
+#define WGL_SAMPLE_BUFFERS_ARB 0x2041
+#define WGL_SAMPLES_ARB 0x2042
+
+
+static boolean
+query_attrib(
+ int iPixelFormat,
+ int iLayerPlane,
+ int attrib,
+ int *pvalue )
+{
+ uint count;
+ uint index;
+ const struct pixelformat_info *pf;
+
+ count = 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;
+
+ pf = pixelformat_get_info( index );
+
+ switch (attrib) {
+ case WGL_DRAW_TO_WINDOW_ARB:
+ *pvalue = TRUE;
+ return TRUE;
+
+ case WGL_DRAW_TO_BITMAP_ARB:
+ *pvalue = FALSE;
+ return TRUE;
+
+ case WGL_NEED_PALETTE_ARB:
+ *pvalue = FALSE;
+ return TRUE;
+
+ case WGL_NEED_SYSTEM_PALETTE_ARB:
+ *pvalue = FALSE;
+ return TRUE;
+
+ case WGL_SWAP_METHOD_ARB:
+ if (pf->flags & PF_FLAG_DOUBLEBUFFER)
+ *pvalue = WGL_SWAP_COPY_ARB;
+ else
+ *pvalue = 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 = FALSE;
+ break;
+
+ case WGL_SUPPORT_OPENGL_ARB:
+ *pvalue = TRUE;
+ break;
+
+ case WGL_DOUBLE_BUFFER_ARB:
+ if (pf->flags & PF_FLAG_DOUBLEBUFFER)
+ *pvalue = TRUE;
+ else
+ *pvalue = FALSE;
+ break;
+
+ case WGL_STEREO_ARB:
+ *pvalue = FALSE;
+ break;
+
+ case WGL_PIXEL_TYPE_ARB:
+ *pvalue = WGL_TYPE_RGBA_ARB;
+ break;
+
+ case WGL_COLOR_BITS_ARB:
+ *pvalue = (int) (pf->color.redbits + pf->color.greenbits + pf->color.bluebits);
+ break;
+
+ case WGL_RED_BITS_ARB:
+ *pvalue = (int) pf->color.redbits;
+ break;
+
+ case WGL_RED_SHIFT_ARB:
+ *pvalue = (int) pf->color.redshift;
+ break;
+
+ case WGL_GREEN_BITS_ARB:
+ *pvalue = (int) pf->color.greenbits;
+ break;
+
+ case WGL_GREEN_SHIFT_ARB:
+ *pvalue = (int) pf->color.greenshift;
+ break;
+
+ case WGL_BLUE_BITS_ARB:
+ *pvalue = (int) pf->color.bluebits;
+ break;
+
+ case WGL_BLUE_SHIFT_ARB:
+ *pvalue = (int) pf->color.blueshift;
+ break;
+
+ case WGL_ALPHA_BITS_ARB:
+ *pvalue = (int) pf->alpha.alphabits;
+ break;
+
+ case WGL_ALPHA_SHIFT_ARB:
+ *pvalue = (int) pf->alpha.alphashift;
+ break;
+
+ case WGL_ACCUM_BITS_ARB:
+ case WGL_ACCUM_RED_BITS_ARB:
+ case WGL_ACCUM_GREEN_BITS_ARB:
+ case WGL_ACCUM_BLUE_BITS_ARB:
+ case WGL_ACCUM_ALPHA_BITS_ARB:
+ *pvalue = 0;
+ break;
+
+ case WGL_DEPTH_BITS_ARB:
+ *pvalue = (int) pf->depth.depthbits;
+ break;
+
+ case WGL_STENCIL_BITS_ARB:
+ *pvalue = (int) pf->depth.stencilbits;
+ break;
+
+ case WGL_AUX_BUFFERS_ARB:
+ *pvalue = 0;
+ break;
+
+ case WGL_SAMPLE_BUFFERS_ARB:
+ if (pf->flags & PF_FLAG_MULTISAMPLED)
+ *pvalue = stw_query_sample_buffers();
+ else
+ *pvalue = 0;
+ break;
+
+ case WGL_SAMPLES_ARB:
+ if (pf->flags & PF_FLAG_MULTISAMPLED)
+ *pvalue = stw_query_samples();
+ else
+ *pvalue = 0;
+ break;
+
+ default:
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+struct attrib_match_info
+{
+ int attribute;
+ int weight;
+ BOOL exact;
+};
+
+static 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 pixelformat_score
+{
+ int points;
+ uint index;
+};
+
+static BOOL
+score_pixelformats(
+ struct pixelformat_score *scores,
+ uint count,
+ int attribute,
+ int expected_value )
+{
+ uint i;
+ 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 (!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 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 = pixelformat_get_extended_count();
+ scores = (struct pixelformat_score *) MALLOC( count * sizeof( struct 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 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 (!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 (!query_attrib( iPixelFormat, iLayerPlane, piAttributes[i], &piValues[i] ))
+ return FALSE;
+ }
+
+ return TRUE;
+}
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