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authorBrian Paul <brianp@vmware.com>2010-04-23 11:58:52 -0600
committerBrian Paul <brianp@vmware.com>2010-04-23 12:29:31 -0600
commit3643841079a1413695172d0e5dd5e0a5f2e22945 (patch)
treeb41aceb1e75c924250f13b9343980f057ee8827a /src/mesa
parentf855193796b834e9f06775f8a7130837d1f86f95 (diff)
mesa: faster, simpler is_compressed_format()
Diffstat (limited to 'src/mesa')
-rw-r--r--src/mesa/main/teximage.c42
1 files changed, 24 insertions, 18 deletions
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index b31ca86f11..b7cd5ab2f9 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -358,30 +358,36 @@ _mesa_base_tex_format( GLcontext *ctx, GLint internalFormat )
/**
- * Test if it is a supported compressed format.
- *
+ * Test if a texture format is a supported compressed format.
* \param internalFormat the internal format token provided by the user.
- *
- * \ret GL_TRUE if \p internalFormat is a supported compressed format, or
- * GL_FALSE otherwise.
- *
- * Currently only GL_COMPRESSED_RGB_FXT1_3DFX and GL_COMPRESSED_RGBA_FXT1_3DFX
- * are supported.
+ * \return GL_TRUE if compressed, GL_FALSE if uncompressed
*/
static GLboolean
is_compressed_format(GLcontext *ctx, GLenum internalFormat)
{
- GLint supported[100]; /* 100 should be plenty */
- GLuint i, n;
-
- n = _mesa_get_compressed_formats(ctx, supported, GL_TRUE);
- ASSERT(n < 100);
- for (i = 0; i < n; i++) {
- if ((GLint) internalFormat == supported[i]) {
- return GL_TRUE;
- }
+ switch (internalFormat) {
+ case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+ return ctx->Extensions.EXT_texture_compression_s3tc;
+ case GL_RGB_S3TC:
+ case GL_RGB4_S3TC:
+ case GL_RGBA_S3TC:
+ case GL_RGBA4_S3TC:
+ return ctx->Extensions.S3_s3tc;
+ case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
+ return ctx->Extensions.EXT_texture_sRGB
+ && ctx->Extensions.EXT_texture_compression_s3tc;
+ case GL_COMPRESSED_RGB_FXT1_3DFX:
+ case GL_COMPRESSED_RGBA_FXT1_3DFX:
+ return ctx->Extensions.TDFX_texture_compression_FXT1;
+ default:
+ return GL_FALSE;
}
- return GL_FALSE;
}