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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 "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, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| GLubyte red; |
| unsigned_fetch_texel_rgtc(rowStride, map, 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, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| GLubyte red; |
| unsigned_fetch_texel_rgtc(rowStride, map, 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, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| GLbyte red; |
| signed_fetch_texel_rgtc(rowStride, (const GLbyte *) map, |
| 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, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| GLbyte red; |
| signed_fetch_texel_rgtc(rowStride, (GLbyte *) map, |
| 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, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| GLubyte red, green; |
| unsigned_fetch_texel_rgtc(rowStride, |
| map, |
| i, j, &red, 2); |
| unsigned_fetch_texel_rgtc(rowStride, |
| map + 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, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| GLubyte red, green; |
| unsigned_fetch_texel_rgtc(rowStride, |
| map, |
| i, j, &red, 2); |
| unsigned_fetch_texel_rgtc(rowStride, |
| map + 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, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| GLbyte red, green; |
| signed_fetch_texel_rgtc(rowStride, |
| (GLbyte *) map, |
| i, j, &red, 2); |
| signed_fetch_texel_rgtc(rowStride, |
| (GLbyte *) map + 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, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| GLbyte red, green; |
| signed_fetch_texel_rgtc(rowStride, |
| (GLbyte *) map, |
| i, j, &red, 2); |
| signed_fetch_texel_rgtc(rowStride, |
| (GLbyte *) map + 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; |
| } |
| } |