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mesa: add new texel fetch code for rgtc formats

This commit is contained in:
Brian Paul 2012-12-08 15:19:44 -07:00
parent 141d299965
commit cd7baf5bf4
2 changed files with 166 additions and 0 deletions
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161
src/mesa/main/texcompress_rgtc.c
View File

@ -447,3 +447,164 @@ _mesa_fetch_texel_signed_la_latc2(const struct swrast_texture_image *texImage,
#undef TYPE
#undef T_MIN
#undef T_MAX
static void
fetch_red_rgtc1(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k, GLfloat *texel)
{
GLubyte red;
GLuint sliceOffset = k ? imageOffsets[k] / 2 : 0;
unsigned_fetch_texel_rgtc(rowStride, map + sliceOffset, i, j, &red, 1);
texel[RCOMP] = UBYTE_TO_FLOAT(red);
texel[GCOMP] = 0.0;
texel[BCOMP] = 0.0;
texel[ACOMP] = 1.0;
}
static void
fetch_l_latc1(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k, GLfloat *texel)
{
GLubyte red;
GLuint sliceOffset = k ? imageOffsets[k] / 2 : 0;
unsigned_fetch_texel_rgtc(rowStride, map + sliceOffset, i, j, &red, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = UBYTE_TO_FLOAT(red);
texel[ACOMP] = 1.0;
}
static void
fetch_signed_red_rgtc1(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k,
GLfloat *texel)
{
GLbyte red;
GLuint sliceOffset = k ? imageOffsets[k] / 2 : 0;
signed_fetch_texel_rgtc(rowStride, (const GLbyte *) map + sliceOffset,
i, j, &red, 1);
texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
texel[GCOMP] = 0.0;
texel[BCOMP] = 0.0;
texel[ACOMP] = 1.0;
}
static void
fetch_signed_l_latc1(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k,
GLfloat *texel)
{
GLubyte red;
GLuint sliceOffset = k ? imageOffsets[k] / 2 : 0;
unsigned_fetch_texel_rgtc(rowStride, map + sliceOffset, i, j, &red, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = BYTE_TO_FLOAT(red);
texel[ACOMP] = 1.0;
}
static void
fetch_rg_rgtc2(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k,
GLfloat *texel)
{
GLubyte red, green;
GLuint sliceOffset = k ? imageOffsets[k] : 0;
unsigned_fetch_texel_rgtc(rowStride,
map + sliceOffset,
i, j, &red, 2);
unsigned_fetch_texel_rgtc(rowStride,
map + sliceOffset + 8,
i, j, &green, 2);
texel[RCOMP] = UBYTE_TO_FLOAT(red);
texel[GCOMP] = UBYTE_TO_FLOAT(green);
texel[BCOMP] = 0.0;
texel[ACOMP] = 1.0;
}
static void
fetch_la_latc2(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k,
GLfloat *texel)
{
GLubyte red, green;
GLuint sliceOffset = k ? imageOffsets[k] : 0;
unsigned_fetch_texel_rgtc(rowStride,
map + sliceOffset,
i, j, &red, 2);
unsigned_fetch_texel_rgtc(rowStride,
map + sliceOffset + 8,
i, j, &green, 2);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = UBYTE_TO_FLOAT(red);
texel[ACOMP] = UBYTE_TO_FLOAT(green);
}
static void
fetch_signed_rg_rgtc2(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k,
GLfloat *texel)
{
GLbyte red, green;
GLuint sliceOffset = k ? imageOffsets[k] : 0;
signed_fetch_texel_rgtc(rowStride,
(GLbyte *) map + sliceOffset,
i, j, &red, 2);
signed_fetch_texel_rgtc(rowStride,
(GLbyte *) map + sliceOffset + 8,
i, j, &green, 2);
texel[RCOMP] = BYTE_TO_FLOAT_TEX(red);
texel[GCOMP] = BYTE_TO_FLOAT_TEX(green);
texel[BCOMP] = 0.0;
texel[ACOMP] = 1.0;
}
static void
fetch_signed_la_latc2(const GLubyte *map, const GLuint imageOffsets[],
GLint rowStride, GLint i, GLint j, GLint k,
GLfloat *texel)
{
GLbyte red, green;
GLuint sliceOffset = k ? imageOffsets[k] : 0;
signed_fetch_texel_rgtc(rowStride,
(GLbyte *) map + sliceOffset,
i, j, &red, 2);
signed_fetch_texel_rgtc(rowStride,
(GLbyte *) map + sliceOffset + 8,
i, j, &green, 2);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = BYTE_TO_FLOAT_TEX(red);
texel[ACOMP] = BYTE_TO_FLOAT_TEX(green);
}
compressed_fetch_func
_mesa_get_compressed_rgtc_func(gl_format format)
{
switch (format) {
case MESA_FORMAT_RED_RGTC1:
return fetch_red_rgtc1;
case MESA_FORMAT_L_LATC1:
return fetch_l_latc1;
case MESA_FORMAT_SIGNED_RED_RGTC1:
return fetch_signed_red_rgtc1;
case MESA_FORMAT_SIGNED_L_LATC1:
return fetch_signed_l_latc1;
case MESA_FORMAT_RG_RGTC2:
return fetch_rg_rgtc2;
case MESA_FORMAT_LA_LATC2:
return fetch_la_latc2;
case MESA_FORMAT_SIGNED_RG_RGTC2:
return fetch_signed_rg_rgtc2;
case MESA_FORMAT_SIGNED_LA_LATC2:
return fetch_signed_la_latc2;
default:
return NULL;
}
}

5
src/mesa/main/texcompress_rgtc.h
View File

@ -74,4 +74,9 @@ extern void
_mesa_fetch_texel_signed_la_latc2(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel);
extern compressed_fetch_func
_mesa_get_compressed_rgtc_func(gl_format format);
#endif