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/*
* Copyright (C) 2011 Red Hat Inc.
*
* block compression parts are:
* Copyright (C) 2004 Roland Scheidegger 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Author:
* Dave Airlie
*/
/**
* \file texcompress_rgtc.c
* GL_EXT_texture_compression_rgtc support.
*/
#include "glheader.h"
#include "imports.h"
#include "colormac.h"
#include "image.h"
#include "macros.h"
#include "mfeatures.h"
#include "mipmap.h"
#include "texcompress.h"
#include "texcompress_rgtc.h"
#include "texstore.h"
#define RGTC_DEBUG 0
static void unsigned_encode_rgtc_ubyte(GLubyte *blkaddr, GLubyte srccolors[4][4],
GLint numxpixels, GLint numypixels);
static void signed_encode_rgtc_ubyte(GLbyte *blkaddr, GLbyte srccolors[4][4],
GLint numxpixels, GLint numypixels);
static void unsigned_fetch_texel_rgtc(unsigned srcRowStride, const GLubyte *pixdata,
unsigned i, unsigned j, GLubyte *value, unsigned comps);
static void signed_fetch_texel_rgtc(unsigned srcRowStride, const GLbyte *pixdata,
unsigned i, unsigned j, GLbyte *value, unsigned comps);
static void extractsrc_u( GLubyte srcpixels[4][4], const GLubyte *srcaddr,
GLint srcRowStride, GLint numxpixels, GLint numypixels, GLint comps)
{
GLubyte i, j;
const GLubyte *curaddr;
for (j = 0; j < numypixels; j++) {
curaddr = srcaddr + j * srcRowStride * comps;
for (i = 0; i < numxpixels; i++) {
srcpixels[j][i] = *curaddr;
curaddr += comps;
}
}
}
static void extractsrc_s( GLbyte srcpixels[4][4], const GLfloat *srcaddr,
GLint srcRowStride, GLint numxpixels, GLint numypixels, GLint comps)
{
GLubyte i, j;
const GLfloat *curaddr;
for (j = 0; j < numypixels; j++) {
curaddr = srcaddr + j * srcRowStride * comps;
for (i = 0; i < numxpixels; i++) {
srcpixels[j][i] = FLOAT_TO_BYTE_TEX(*curaddr);
curaddr += comps;
}
}
}
GLboolean
_mesa_texstore_red_rgtc1(TEXSTORE_PARAMS)
{
GLubyte *dst;
const GLubyte *tempImage = NULL;
int i, j;
int numxpixels, numypixels;
const GLubyte *srcaddr;
GLubyte srcpixels[4][4];
GLubyte *blkaddr;
GLint dstRowDiff;
ASSERT(dstFormat == MESA_FORMAT_RED_RGTC1 ||
dstFormat == MESA_FORMAT_L_LATC1);
tempImage = _mesa_make_temp_ubyte_image(ctx, dims,
baseInternalFormat,
_mesa_get_format_base_format(dstFormat),
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
if (!tempImage)
return GL_FALSE; /* out of memory */
dst = dstSlices[0];
blkaddr = dst;
dstRowDiff = dstRowStride >= (srcWidth * 2) ? dstRowStride - (((srcWidth + 3) & ~3) * 2) : 0;
for (j = 0; j < srcHeight; j+=4) {
if (srcHeight > j + 3) numypixels = 4;
else numypixels = srcHeight - j;
srcaddr = tempImage + j * srcWidth;
for (i = 0; i < srcWidth; i += 4) {
if (srcWidth > i + 3) numxpixels = 4;
else numxpixels = srcWidth - i;
extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
srcaddr += numxpixels;
blkaddr += 8;
}
blkaddr += dstRowDiff;
}
free((void *) tempImage);
return GL_TRUE;
}
GLboolean
_mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS)
{
GLbyte *dst;
const GLfloat *tempImage = NULL;
int i, j;
int numxpixels, numypixels;
const GLfloat *srcaddr;
GLbyte srcpixels[4][4];
GLbyte *blkaddr;
GLint dstRowDiff;
ASSERT(dstFormat == MESA_FORMAT_SIGNED_RED_RGTC1 ||
dstFormat == MESA_FORMAT_SIGNED_L_LATC1);
tempImage = _mesa_make_temp_float_image(ctx, dims,
baseInternalFormat,
_mesa_get_format_base_format(dstFormat),
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking, 0x0);
if (!tempImage)
return GL_FALSE; /* out of memory */
dst = (GLbyte *) dstSlices[0];
blkaddr = dst;
dstRowDiff = dstRowStride >= (srcWidth * 2) ? dstRowStride - (((srcWidth + 3) & ~3) * 2) : 0;
for (j = 0; j < srcHeight; j+=4) {
if (srcHeight > j + 3) numypixels = 4;
else numypixels = srcHeight - j;
srcaddr = tempImage + j * srcWidth;
for (i = 0; i < srcWidth; i += 4) {
if (srcWidth > i + 3) numxpixels = 4;
else numxpixels = srcWidth - i;
extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1);
signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
srcaddr += numxpixels;
blkaddr += 8;
}
blkaddr += dstRowDiff;
}
free((void *) tempImage);
return GL_TRUE;
}
GLboolean
_mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS)
{
GLubyte *dst;
const GLubyte *tempImage = NULL;
int i, j;
int numxpixels, numypixels;
const GLubyte *srcaddr;
GLubyte srcpixels[4][4];
GLubyte *blkaddr;
GLint dstRowDiff;
ASSERT(dstFormat == MESA_FORMAT_RG_RGTC2 ||
dstFormat == MESA_FORMAT_LA_LATC2);
tempImage = _mesa_make_temp_ubyte_image(ctx, dims,
baseInternalFormat,
_mesa_get_format_base_format(dstFormat),
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking);
if (!tempImage)
return GL_FALSE; /* out of memory */
dst = dstSlices[0];
blkaddr = dst;
dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0;
for (j = 0; j < srcHeight; j+=4) {
if (srcHeight > j + 3) numypixels = 4;
else numypixels = srcHeight - j;
srcaddr = tempImage + j * srcWidth * 2;
for (i = 0; i < srcWidth; i += 4) {
if (srcWidth > i + 3) numxpixels = 4;
else numxpixels = srcWidth - i;
extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
blkaddr += 8;
extractsrc_u(srcpixels, (GLubyte *)srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
blkaddr += 8;
srcaddr += numxpixels * 2;
}
blkaddr += dstRowDiff;
}
free((void *) tempImage);
return GL_TRUE;
}
GLboolean
_mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS)
{
GLbyte *dst;
const GLfloat *tempImage = NULL;
int i, j;
int numxpixels, numypixels;
const GLfloat *srcaddr;
GLbyte srcpixels[4][4];
GLbyte *blkaddr;
GLint dstRowDiff;
ASSERT(dstFormat == MESA_FORMAT_SIGNED_RG_RGTC2 ||
dstFormat == MESA_FORMAT_SIGNED_LA_LATC2);
tempImage = _mesa_make_temp_float_image(ctx, dims,
baseInternalFormat,
_mesa_get_format_base_format(dstFormat),
srcWidth, srcHeight, srcDepth,
srcFormat, srcType, srcAddr,
srcPacking, 0x0);
if (!tempImage)
return GL_FALSE; /* out of memory */
dst = (GLbyte *) dstSlices[0];
blkaddr = dst;
dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0;
for (j = 0; j < srcHeight; j += 4) {
if (srcHeight > j + 3) numypixels = 4;
else numypixels = srcHeight - j;
srcaddr = tempImage + j * srcWidth * 2;
for (i = 0; i < srcWidth; i += 4) {
if (srcWidth > i + 3) numxpixels = 4;
else numxpixels = srcWidth - i;
extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2);
signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
blkaddr += 8;
extractsrc_s(srcpixels, srcaddr + 1, srcWidth, numxpixels, numypixels, 2);
signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels);
blkaddr += 8;
srcaddr += numxpixels * 2;
}
blkaddr += dstRowDiff;
}
free((void *) tempImage);
return GL_TRUE;
}
#define TAG(x) unsigned_##x
#define TYPE GLubyte
#define T_MIN 0
#define T_MAX 0xff
#include "texcompress_rgtc_tmp.h"
#undef TAG
#undef TYPE
#undef T_MIN
#undef T_MAX
#define TAG(x) signed_##x
#define TYPE GLbyte
#define T_MIN (GLbyte)-128
#define T_MAX (GLbyte)127
#include "texcompress_rgtc_tmp.h"
#undef TAG
#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;
}
}
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