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-rw-r--r--src/mesa/state_tracker/st_format.c621
1 files changed, 621 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_format.c b/src/mesa/state_tracker/st_format.c
new file mode 100644
index 0000000000..a8ae30a454
--- /dev/null
+++ b/src/mesa/state_tracker/st_format.c
@@ -0,0 +1,621 @@
+/**************************************************************************
+ *
+ * Copyright 2007 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.
+ *
+ **************************************************************************/
+
+
+/**
+ * Texture Image-related functions.
+ * \author Brian Paul
+ */
+
+#include "main/imports.h"
+#include "main/context.h"
+#include "main/texstore.h"
+#include "main/texformat.h"
+#include "main/enums.h"
+#include "main/macros.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_screen.h"
+#include "st_context.h"
+#include "st_format.h"
+
+static GLuint
+format_bits(
+ pipe_format_rgbazs_t info,
+ GLuint comp )
+{
+ return pf_get_component_bits( (enum pipe_format) info, comp );
+}
+
+static GLuint
+format_max_bits(
+ pipe_format_rgbazs_t info )
+{
+ GLuint size = format_bits( info, PIPE_FORMAT_COMP_R );
+
+ size = MAX2( size, format_bits( info, PIPE_FORMAT_COMP_G ) );
+ size = MAX2( size, format_bits( info, PIPE_FORMAT_COMP_B ) );
+ size = MAX2( size, format_bits( info, PIPE_FORMAT_COMP_A ) );
+ size = MAX2( size, format_bits( info, PIPE_FORMAT_COMP_Z ) );
+ size = MAX2( size, format_bits( info, PIPE_FORMAT_COMP_S ) );
+ return size;
+}
+
+static GLuint
+format_size(
+ pipe_format_rgbazs_t info )
+{
+ return
+ format_bits( info, PIPE_FORMAT_COMP_R ) +
+ format_bits( info, PIPE_FORMAT_COMP_G ) +
+ format_bits( info, PIPE_FORMAT_COMP_B ) +
+ format_bits( info, PIPE_FORMAT_COMP_A ) +
+ format_bits( info, PIPE_FORMAT_COMP_Z ) +
+ format_bits( info, PIPE_FORMAT_COMP_S );
+}
+
+/*
+ * XXX temporary here
+ */
+GLboolean
+st_get_format_info(enum pipe_format format, struct pipe_format_info *pinfo)
+{
+ if (pf_layout(format) == PIPE_FORMAT_LAYOUT_RGBAZS) {
+ pipe_format_rgbazs_t info;
+
+ info = format;
+
+#if 0
+ printf("%s\n", pf_name( format ) );
+#endif
+
+ /* Data type */
+ if (format == PIPE_FORMAT_A1R5G5B5_UNORM || format == PIPE_FORMAT_R5G6B5_UNORM) {
+ pinfo->datatype = GL_UNSIGNED_SHORT;
+ }
+ else {
+ GLuint size;
+
+ size = format_max_bits( info );
+ if (size == 8) {
+ if (pf_type(info) == PIPE_FORMAT_TYPE_UNORM)
+ pinfo->datatype = GL_UNSIGNED_BYTE;
+ else
+ pinfo->datatype = GL_BYTE;
+ }
+ else if (size == 16) {
+ if (pf_type(info) == PIPE_FORMAT_TYPE_UNORM)
+ pinfo->datatype = GL_UNSIGNED_SHORT;
+ else
+ pinfo->datatype = GL_SHORT;
+ }
+ else {
+ assert( size <= 32 );
+ if (pf_type(info) == PIPE_FORMAT_TYPE_UNORM)
+ pinfo->datatype = GL_UNSIGNED_INT;
+ else
+ pinfo->datatype = GL_INT;
+ }
+ }
+
+ /* Component bits */
+ pinfo->red_bits = format_bits( info, PIPE_FORMAT_COMP_R );
+ pinfo->green_bits = format_bits( info, PIPE_FORMAT_COMP_G );
+ pinfo->blue_bits = format_bits( info, PIPE_FORMAT_COMP_B );
+ pinfo->alpha_bits = format_bits( info, PIPE_FORMAT_COMP_A );
+ pinfo->depth_bits = format_bits( info, PIPE_FORMAT_COMP_Z );
+ pinfo->stencil_bits = format_bits( info, PIPE_FORMAT_COMP_S );
+ pinfo->luminance_bits = 0;
+ pinfo->intensity_bits = 0;
+
+ /* Format size */
+ pinfo->size = format_size( info ) / 8;
+
+ /* Luminance & Intensity bits */
+ if( pf_swizzle_x(info) == PIPE_FORMAT_COMP_R &&
+ pf_swizzle_y(info) == PIPE_FORMAT_COMP_R &&
+ pf_swizzle_z(info) == PIPE_FORMAT_COMP_R ) {
+ if( pf_swizzle_w(info) == PIPE_FORMAT_COMP_R ) {
+ pinfo->intensity_bits = pinfo->red_bits;
+ }
+ else {
+ pinfo->luminance_bits = pinfo->red_bits;
+ }
+ pinfo->red_bits = 0;
+ }
+
+ /* Base format */
+ if (pinfo->depth_bits) {
+ if (pinfo->stencil_bits) {
+ pinfo->base_format = GL_DEPTH_STENCIL_EXT;
+ }
+ else {
+ pinfo->base_format = GL_DEPTH_COMPONENT;
+ }
+ }
+ else if (pinfo->stencil_bits) {
+ pinfo->base_format = GL_STENCIL_INDEX;
+ }
+ else {
+ pinfo->base_format = GL_RGBA;
+ }
+ }
+ else if (pf_layout(format) == PIPE_FORMAT_LAYOUT_YCBCR) {
+ pinfo->base_format = GL_YCBCR_MESA;
+ pinfo->datatype = GL_UNSIGNED_SHORT;
+ pinfo->size = 2; /* two bytes per "texel" */
+ }
+ else {
+ /* compressed format? */
+ assert(0);
+ }
+
+#if 0
+ printf(
+ "ST_FORMAT: R(%u), G(%u), B(%u), A(%u), Z(%u), S(%u)\n",
+ pinfo->red_bits,
+ pinfo->green_bits,
+ pinfo->blue_bits,
+ pinfo->alpha_bits,
+ pinfo->depth_bits,
+ pinfo->stencil_bits );
+#endif
+
+ pinfo->format = format;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Return bytes per pixel for the given format.
+ */
+GLuint
+st_sizeof_format(enum pipe_format format)
+{
+ struct pipe_format_info info;
+ if (!st_get_format_info( format, &info )) {
+ assert( 0 );
+ return 0;
+ }
+ return info.size;
+}
+
+
+/**
+ * Return bytes per pixel for the given format.
+ */
+GLenum
+st_format_datatype(enum pipe_format format)
+{
+ struct pipe_format_info info;
+ if (!st_get_format_info( format, &info )) {
+ assert( 0 );
+ return 0;
+ }
+ return info.datatype;
+}
+
+
+enum pipe_format
+st_mesa_format_to_pipe_format(GLuint mesaFormat)
+{
+ switch (mesaFormat) {
+ /* fix this */
+ case MESA_FORMAT_ARGB8888_REV:
+ case MESA_FORMAT_ARGB8888:
+ return PIPE_FORMAT_A8R8G8B8_UNORM;
+ case MESA_FORMAT_ARGB1555:
+ return PIPE_FORMAT_A1R5G5B5_UNORM;
+ case MESA_FORMAT_ARGB4444:
+ return PIPE_FORMAT_A4R4G4B4_UNORM;
+ case MESA_FORMAT_RGB565:
+ return PIPE_FORMAT_R5G6B5_UNORM;
+ case MESA_FORMAT_AL88:
+ return PIPE_FORMAT_A8L8_UNORM;
+ case MESA_FORMAT_A8:
+ return PIPE_FORMAT_A8_UNORM;
+ case MESA_FORMAT_L8:
+ return PIPE_FORMAT_L8_UNORM;
+ case MESA_FORMAT_I8:
+ return PIPE_FORMAT_I8_UNORM;
+ case MESA_FORMAT_Z16:
+ return PIPE_FORMAT_Z16_UNORM;
+ case MESA_FORMAT_Z32:
+ return PIPE_FORMAT_Z32_UNORM;
+ case MESA_FORMAT_Z24_S8:
+ return PIPE_FORMAT_Z24S8_UNORM;
+ case MESA_FORMAT_S8_Z24:
+ return PIPE_FORMAT_S8Z24_UNORM;
+ case MESA_FORMAT_YCBCR:
+ return PIPE_FORMAT_YCBCR;
+#if FEATURE_texture_s3tc
+ case MESA_FORMAT_RGB_DXT1:
+ return PIPE_FORMAT_DXT1_RGB;
+ case MESA_FORMAT_RGBA_DXT1:
+ return PIPE_FORMAT_DXT1_RGBA;
+ case MESA_FORMAT_RGBA_DXT3:
+ return PIPE_FORMAT_DXT3_RGBA;
+ case MESA_FORMAT_RGBA_DXT5:
+ return PIPE_FORMAT_DXT5_RGBA;
+#endif
+ default:
+ assert(0);
+ return 0;
+ }
+}
+
+/**
+ * Find an RGBA format supported by the context/winsys.
+ */
+static enum pipe_format
+default_rgba_format(struct pipe_screen *screen,
+ enum pipe_texture_target target,
+ unsigned tex_usage,
+ unsigned geom_flags)
+{
+ static const enum pipe_format colorFormats[] = {
+ PIPE_FORMAT_A8R8G8B8_UNORM,
+ PIPE_FORMAT_B8G8R8A8_UNORM,
+ PIPE_FORMAT_R8G8B8A8_UNORM,
+ PIPE_FORMAT_R5G6B5_UNORM
+ };
+ uint i;
+ for (i = 0; i < Elements(colorFormats); i++) {
+ if (screen->is_format_supported( screen, colorFormats[i], target, tex_usage, geom_flags )) {
+ return colorFormats[i];
+ }
+ }
+ return PIPE_FORMAT_NONE;
+}
+
+
+/**
+ * Search list of formats for first RGBA format with >8 bits/channel.
+ */
+static enum pipe_format
+default_deep_rgba_format(struct pipe_screen *screen,
+ enum pipe_texture_target target,
+ unsigned tex_usage,
+ unsigned geom_flags)
+{
+ if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_SNORM, target, tex_usage, geom_flags)) {
+ return PIPE_FORMAT_R16G16B16A16_SNORM;
+ }
+ if (tex_usage & PIPE_TEXTURE_USAGE_RENDER_TARGET)
+ return default_rgba_format(screen, target, tex_usage, geom_flags);
+ else
+ return PIPE_FORMAT_NONE;
+}
+
+
+/**
+ * Find an Z format supported by the context/winsys.
+ */
+static enum pipe_format
+default_depth_format(struct pipe_screen *screen,
+ enum pipe_texture_target target,
+ unsigned tex_usage,
+ unsigned geom_flags)
+{
+ static const enum pipe_format zFormats[] = {
+ PIPE_FORMAT_Z16_UNORM,
+ PIPE_FORMAT_Z32_UNORM,
+ PIPE_FORMAT_S8Z24_UNORM,
+ PIPE_FORMAT_Z24S8_UNORM
+ };
+ uint i;
+ for (i = 0; i < Elements(zFormats); i++) {
+ if (screen->is_format_supported( screen, zFormats[i], target, tex_usage, geom_flags )) {
+ return zFormats[i];
+ }
+ }
+ return PIPE_FORMAT_NONE;
+}
+
+
+/**
+ * Given an OpenGL internalFormat value for a texture or surface, return
+ * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
+ * \param target one of PIPE_TEXTURE_x
+ * \param tex_usage either PIPE_TEXTURE_USAGE_RENDER_TARGET
+ * or PIPE_TEXTURE_USAGE_SAMPLER
+ */
+enum pipe_format
+st_choose_format(struct pipe_context *pipe, GLint internalFormat,
+ enum pipe_texture_target target, unsigned tex_usage)
+{
+ struct pipe_screen *screen = pipe->screen;
+ unsigned geom_flags = 0;
+
+ switch (internalFormat) {
+ case 4:
+ case GL_RGBA:
+ case GL_COMPRESSED_RGBA:
+ case 3:
+ case GL_RGB:
+ case GL_COMPRESSED_RGB:
+ case GL_RGBA8:
+ case GL_RGB10_A2:
+ case GL_RGBA12:
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+ case GL_RGBA16:
+ if (tex_usage & PIPE_TEXTURE_USAGE_RENDER_TARGET)
+ return default_deep_rgba_format( screen, target, tex_usage, geom_flags );
+ else
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+
+ case GL_RGBA4:
+ case GL_RGBA2:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_A4R4G4B4_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_A4R4G4B4_UNORM;
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+
+ case GL_RGB5_A1:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_A1R5G5B5_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_A1R5G5B5_UNORM;
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+
+ case GL_RGB8:
+ case GL_RGB10:
+ case GL_RGB12:
+ case GL_RGB16:
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+
+ case GL_RGB5:
+ case GL_RGB4:
+ case GL_R3_G3_B2:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_A1R5G5B5_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_A1R5G5B5_UNORM;
+ if (screen->is_format_supported( screen, PIPE_FORMAT_R5G6B5_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_R5G6B5_UNORM;
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+
+ case GL_ALPHA:
+ case GL_ALPHA4:
+ case GL_ALPHA8:
+ case GL_ALPHA12:
+ case GL_ALPHA16:
+ case GL_COMPRESSED_ALPHA:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_A8_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_A8_UNORM;
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+
+ case 1:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE4:
+ case GL_LUMINANCE8:
+ case GL_LUMINANCE12:
+ case GL_LUMINANCE16:
+ case GL_COMPRESSED_LUMINANCE:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_L8_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_L8_UNORM;
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+
+ case 2:
+ case GL_LUMINANCE_ALPHA:
+ case GL_LUMINANCE4_ALPHA4:
+ case GL_LUMINANCE6_ALPHA2:
+ case GL_LUMINANCE8_ALPHA8:
+ case GL_LUMINANCE12_ALPHA4:
+ case GL_LUMINANCE12_ALPHA12:
+ case GL_LUMINANCE16_ALPHA16:
+ case GL_COMPRESSED_LUMINANCE_ALPHA:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_A8L8_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_A8L8_UNORM;
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+
+ case GL_INTENSITY:
+ case GL_INTENSITY4:
+ case GL_INTENSITY8:
+ case GL_INTENSITY12:
+ case GL_INTENSITY16:
+ case GL_COMPRESSED_INTENSITY:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_I8_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_I8_UNORM;
+ return default_rgba_format( screen, target, tex_usage, geom_flags );
+
+ case GL_YCBCR_MESA:
+ if (screen->is_format_supported(screen, PIPE_FORMAT_YCBCR,
+ target, tex_usage, geom_flags)) {
+ return PIPE_FORMAT_YCBCR;
+ }
+ if (screen->is_format_supported(screen, PIPE_FORMAT_YCBCR_REV,
+ target, tex_usage, geom_flags)) {
+ return PIPE_FORMAT_YCBCR_REV;
+ }
+ return PIPE_FORMAT_NONE;
+
+ case GL_RGB_S3TC:
+ case GL_RGB4_S3TC:
+ case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+ return PIPE_FORMAT_DXT1_RGB;
+
+ case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+ return PIPE_FORMAT_DXT1_RGBA;
+
+ case GL_RGBA_S3TC:
+ case GL_RGBA4_S3TC:
+ case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+ return PIPE_FORMAT_DXT3_RGBA;
+
+ case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+ return PIPE_FORMAT_DXT5_RGBA;
+
+#if 0
+ case GL_COMPRESSED_RGB_FXT1_3DFX:
+ return PIPE_FORMAT_RGB_FXT1;
+ case GL_COMPRESSED_RGBA_FXT1_3DFX:
+ return PIPE_FORMAT_RGB_FXT1;
+#endif
+
+ case GL_DEPTH_COMPONENT16:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_Z16_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_Z16_UNORM;
+ /* fall-through */
+ case GL_DEPTH_COMPONENT24:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_S8Z24_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_S8Z24_UNORM;
+ if (screen->is_format_supported( screen, PIPE_FORMAT_Z24S8_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_Z24S8_UNORM;
+ /* fall-through */
+ case GL_DEPTH_COMPONENT32:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_Z32_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_Z32_UNORM;
+ /* fall-through */
+ case GL_DEPTH_COMPONENT:
+ return default_depth_format( screen, target, tex_usage, geom_flags );
+
+ case GL_STENCIL_INDEX:
+ case GL_STENCIL_INDEX1_EXT:
+ case GL_STENCIL_INDEX4_EXT:
+ case GL_STENCIL_INDEX8_EXT:
+ case GL_STENCIL_INDEX16_EXT:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_S8_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_S8_UNORM;
+ if (screen->is_format_supported( screen, PIPE_FORMAT_S8Z24_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_S8Z24_UNORM;
+ if (screen->is_format_supported( screen, PIPE_FORMAT_Z24S8_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_Z24S8_UNORM;
+ return PIPE_FORMAT_NONE;
+
+ case GL_DEPTH_STENCIL_EXT:
+ case GL_DEPTH24_STENCIL8_EXT:
+ if (screen->is_format_supported( screen, PIPE_FORMAT_S8Z24_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_S8Z24_UNORM;
+ if (screen->is_format_supported( screen, PIPE_FORMAT_Z24S8_UNORM, target, tex_usage, geom_flags ))
+ return PIPE_FORMAT_Z24S8_UNORM;
+ return PIPE_FORMAT_NONE;
+
+ default:
+ return PIPE_FORMAT_NONE;
+ }
+}
+
+
+static GLboolean
+is_stencil_format(GLenum format)
+{
+ switch (format) {
+ case GL_STENCIL_INDEX:
+ case GL_STENCIL_INDEX1_EXT:
+ case GL_STENCIL_INDEX4_EXT:
+ case GL_STENCIL_INDEX8_EXT:
+ case GL_STENCIL_INDEX16_EXT:
+ case GL_DEPTH_STENCIL_EXT:
+ case GL_DEPTH24_STENCIL8_EXT:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+/**
+ * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
+ */
+enum pipe_format
+st_choose_renderbuffer_format(struct pipe_context *pipe, GLint internalFormat)
+{
+ uint usage;
+ if (is_stencil_format(internalFormat))
+ usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
+ else
+ usage = PIPE_TEXTURE_USAGE_RENDER_TARGET;
+ return st_choose_format(pipe, internalFormat, PIPE_TEXTURE_2D, usage);
+}
+
+
+static const struct gl_texture_format *
+translate_gallium_format_to_mesa_format(enum pipe_format format)
+{
+ switch (format) {
+ case PIPE_FORMAT_A8R8G8B8_UNORM:
+ return &_mesa_texformat_argb8888;
+ case PIPE_FORMAT_A1R5G5B5_UNORM:
+ return &_mesa_texformat_argb1555;
+ case PIPE_FORMAT_A4R4G4B4_UNORM:
+ return &_mesa_texformat_argb4444;
+ case PIPE_FORMAT_R5G6B5_UNORM:
+ return &_mesa_texformat_rgb565;
+ case PIPE_FORMAT_A8L8_UNORM:
+ return &_mesa_texformat_al88;
+ case PIPE_FORMAT_A8_UNORM:
+ return &_mesa_texformat_a8;
+ case PIPE_FORMAT_L8_UNORM:
+ return &_mesa_texformat_l8;
+ case PIPE_FORMAT_I8_UNORM:
+ return &_mesa_texformat_i8;
+ case PIPE_FORMAT_Z16_UNORM:
+ return &_mesa_texformat_z16;
+ case PIPE_FORMAT_Z32_UNORM:
+ return &_mesa_texformat_z32;
+ case PIPE_FORMAT_Z24S8_UNORM:
+ return &_mesa_texformat_z24_s8;
+ case PIPE_FORMAT_S8Z24_UNORM:
+ return &_mesa_texformat_s8_z24;
+ case PIPE_FORMAT_YCBCR:
+ return &_mesa_texformat_ycbcr;
+ case PIPE_FORMAT_YCBCR_REV:
+ return &_mesa_texformat_ycbcr_rev;
+#if FEATURE_texture_s3tc
+ case PIPE_FORMAT_DXT1_RGB:
+ return &_mesa_texformat_rgb_dxt1;
+ case PIPE_FORMAT_DXT1_RGBA:
+ return &_mesa_texformat_rgba_dxt1;
+ case PIPE_FORMAT_DXT3_RGBA:
+ return &_mesa_texformat_rgba_dxt3;
+ case PIPE_FORMAT_DXT5_RGBA:
+ return &_mesa_texformat_rgba_dxt5;
+#endif
+ /* XXX add additional cases */
+ default:
+ assert(0);
+ return NULL;
+ }
+}
+
+
+/**
+ * Called via ctx->Driver.chooseTextureFormat().
+ */
+const struct gl_texture_format *
+st_ChooseTextureFormat(GLcontext *ctx, GLint internalFormat,
+ GLenum format, GLenum type)
+{
+ enum pipe_format pFormat;
+
+ (void) format;
+ (void) type;
+
+ pFormat = st_choose_format(ctx->st->pipe, internalFormat, PIPE_TEXTURE_2D,
+ PIPE_TEXTURE_USAGE_SAMPLER);
+ if (pFormat == PIPE_FORMAT_NONE)
+ return NULL;
+
+ return translate_gallium_format_to_mesa_format(pFormat);
+}
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