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mesa: add new texel fetch code for fxt formats

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This commit is contained in:
Brian Paul 2012-12-08 15:19:44 -07:00
parent a774eaa57e
commit 141d299965
2 changed files with 45 additions and 0 deletions
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42
src/mesa/main/texcompress_fxt1.c
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@ -1643,3 +1643,45 @@ fxt1_decode_1 (const void *texture, GLint stride, /* in pixels */
decode_1[mode](code, t, rgba);
}
static void
fetch_rgb_fxt1(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k, GLfloat *texel)
{
GLubyte rgba[4];
fxt1_decode_1(map, rowStride, i, j, rgba);
texel[RCOMP] = UBYTE_TO_FLOAT(rgba[RCOMP]);
texel[GCOMP] = UBYTE_TO_FLOAT(rgba[GCOMP]);
texel[BCOMP] = UBYTE_TO_FLOAT(rgba[BCOMP]);
texel[ACOMP] = 1.0F;
}
static void
fetch_rgba_fxt1(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k, GLfloat *texel)
{
GLubyte rgba[4];
fxt1_decode_1(map, rowStride, i, j, rgba);
texel[RCOMP] = UBYTE_TO_FLOAT(rgba[RCOMP]);
texel[GCOMP] = UBYTE_TO_FLOAT(rgba[GCOMP]);
texel[BCOMP] = UBYTE_TO_FLOAT(rgba[BCOMP]);
texel[ACOMP] = UBYTE_TO_FLOAT(rgba[ACOMP]);
}
compressed_fetch_func
_mesa_get_fxt_fetch_func(gl_format format)
{
switch (format) {
case MESA_FORMAT_RGB_FXT1:
return fetch_rgb_fxt1;
case MESA_FORMAT_RGBA_FXT1:
return fetch_rgba_fxt1;
default:
return NULL;
}
}

3
src/mesa/main/texcompress_fxt1.h
View file

@ -45,4 +45,7 @@ extern void
_mesa_fetch_texel_2d_f_rgb_fxt1(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel);
compressed_fetch_func
_mesa_get_fxt_fetch_func(gl_format format);
#endif /* TEXCOMPRESS_FXT1_H */