X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Ftexcompress_rgtc.c;h=1012699f55538fd79b35a773d2ce6f55a80187af;hb=ddc8003c61480aa5cbab72435243aa6f99677440;hp=1a01755f14d5f5b2262544512f1d5bae37167069;hpb=3f600047d95f46995915d46aff574796d088fa83;p=mesa.git diff --git a/src/mesa/main/texcompress_rgtc.c b/src/mesa/main/texcompress_rgtc.c index 1a01755f14d..1012699f555 100644 --- a/src/mesa/main/texcompress_rgtc.c +++ b/src/mesa/main/texcompress_rgtc.c @@ -38,28 +38,34 @@ #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 encode_rgtc_chan_u(GLubyte *blkaddr, GLubyte srccolors[4][4], - GLint numxpixels, GLint numypixels); -static void encode_rgtc_chan_s(GLbyte *blkaddr, GLbyte srccolors[4][4], +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 extractsrc_u( GLubyte srcpixels[4][4], const GLchan *srcaddr, +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 GLchan *curaddr; + const GLubyte *curaddr; for (j = 0; j < numypixels; j++) { curaddr = srcaddr + j * srcRowStride * comps; for (i = 0; i < numxpixels; i++) { - srcpixels[j][i] = *curaddr / (CHAN_MAX / 255); + srcpixels[j][i] = *curaddr; curaddr += comps; } } @@ -84,23 +90,17 @@ GLboolean _mesa_texstore_red_rgtc1(TEXSTORE_PARAMS) { GLubyte *dst; - const GLint texWidth = dstRowStride * 4 / 8; /* a bit of a hack */ - const GLchan *tempImage = NULL; + const GLubyte *tempImage = NULL; int i, j; int numxpixels, numypixels; - const GLchan *srcaddr; + const GLubyte *srcaddr; GLubyte srcpixels[4][4]; GLubyte *blkaddr; GLint dstRowDiff; - ASSERT(dstFormat == MESA_FORMAT_RED_RGTC1); - ASSERT(dstXoffset % 4 == 0); - ASSERT(dstYoffset % 4 == 0); - ASSERT(dstZoffset % 4 == 0); - (void) dstZoffset; - (void) dstImageOffsets; + ASSERT(dstFormat == MESA_FORMAT_R_RGTC1_UNORM || + dstFormat == MESA_FORMAT_L_LATC1_UNORM); - - tempImage = _mesa_make_temp_chan_image(ctx, dims, + tempImage = _mesa_make_temp_ubyte_image(ctx, dims, baseInternalFormat, _mesa_get_format_base_format(dstFormat), srcWidth, srcHeight, srcDepth, @@ -109,12 +109,10 @@ _mesa_texstore_red_rgtc1(TEXSTORE_PARAMS) if (!tempImage) return GL_FALSE; /* out of memory */ - dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, - dstFormat, - texWidth, (GLubyte *) dstAddr); + dst = dstSlices[0]; blkaddr = dst; - dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0; + 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; @@ -123,14 +121,14 @@ _mesa_texstore_red_rgtc1(TEXSTORE_PARAMS) if (srcWidth > i + 3) numxpixels = 4; else numxpixels = srcWidth - i; extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1); - encode_rgtc_chan_u(blkaddr, srcpixels, numxpixels, numypixels); + unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels); srcaddr += numxpixels; blkaddr += 8; } blkaddr += dstRowDiff; } - if (tempImage) - free((void *) tempImage); + + free((void *) tempImage); return GL_TRUE; } @@ -139,7 +137,6 @@ GLboolean _mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS) { GLbyte *dst; - const GLint texWidth = dstRowStride * 4 / 8; /* a bit of a hack */ const GLfloat *tempImage = NULL; int i, j; int numxpixels, numypixels; @@ -147,12 +144,8 @@ _mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS) GLbyte srcpixels[4][4]; GLbyte *blkaddr; GLint dstRowDiff; - ASSERT(dstFormat == MESA_FORMAT_SIGNED_RED_RGTC1); - ASSERT(dstXoffset % 4 == 0); - ASSERT(dstYoffset % 4 == 0); - ASSERT(dstZoffset % 4 == 0); - (void) dstZoffset; - (void) dstImageOffsets; + ASSERT(dstFormat == MESA_FORMAT_R_RGTC1_SNORM || + dstFormat == MESA_FORMAT_L_LATC1_SNORM); tempImage = _mesa_make_temp_float_image(ctx, dims, baseInternalFormat, @@ -163,12 +156,10 @@ _mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS) if (!tempImage) return GL_FALSE; /* out of memory */ - dst = (GLbyte *)_mesa_compressed_image_address(dstXoffset, dstYoffset, 0, - dstFormat, - texWidth, (GLubyte *) dstAddr); + dst = (GLbyte *) dstSlices[0]; blkaddr = dst; - dstRowDiff = dstRowStride >= (srcWidth * 4) ? dstRowStride - (((srcWidth + 3) & ~3) * 4) : 0; + 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; @@ -177,14 +168,14 @@ _mesa_texstore_signed_red_rgtc1(TEXSTORE_PARAMS) if (srcWidth > i + 3) numxpixels = 4; else numxpixels = srcWidth - i; extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 1); - encode_rgtc_chan_s(blkaddr, srcpixels, numxpixels, numypixels); + signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels); srcaddr += numxpixels; blkaddr += 8; } blkaddr += dstRowDiff; } - if (tempImage) - free((void *) tempImage); + + free((void *) tempImage); return GL_TRUE; } @@ -193,23 +184,18 @@ GLboolean _mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS) { GLubyte *dst; - const GLint texWidth = dstRowStride * 4 / 16; /* a bit of a hack */ - const GLchan *tempImage = NULL; + const GLubyte *tempImage = NULL; int i, j; int numxpixels, numypixels; - const GLchan *srcaddr; + const GLubyte *srcaddr; GLubyte srcpixels[4][4]; GLubyte *blkaddr; GLint dstRowDiff; - ASSERT(dstFormat == MESA_FORMAT_RG_RGTC2); - ASSERT(dstXoffset % 4 == 0); - ASSERT(dstYoffset % 4 == 0); - ASSERT(dstZoffset % 4 == 0); - (void) dstZoffset; - (void) dstImageOffsets; + ASSERT(dstFormat == MESA_FORMAT_RG_RGTC2_UNORM || + dstFormat == MESA_FORMAT_LA_LATC2_UNORM); - tempImage = _mesa_make_temp_chan_image(ctx, dims, + tempImage = _mesa_make_temp_ubyte_image(ctx, dims, baseInternalFormat, _mesa_get_format_base_format(dstFormat), srcWidth, srcHeight, srcDepth, @@ -218,12 +204,10 @@ _mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS) if (!tempImage) return GL_FALSE; /* out of memory */ - dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, - dstFormat, - texWidth, (GLubyte *) dstAddr); + dst = dstSlices[0]; blkaddr = dst; - dstRowDiff = dstRowStride >= (srcWidth * 8) ? dstRowStride - (((srcWidth + 7) & ~7) * 8) : 0; + 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; @@ -232,11 +216,11 @@ _mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS) if (srcWidth > i + 3) numxpixels = 4; else numxpixels = srcWidth - i; extractsrc_u(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2); - encode_rgtc_chan_u(blkaddr, srcpixels, numxpixels, numypixels); + unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels); blkaddr += 8; - extractsrc_u(srcpixels, (GLchan *)srcaddr + 1, srcWidth, numxpixels, numypixels, 2); - encode_rgtc_chan_u(blkaddr, srcpixels, numxpixels, numypixels); + extractsrc_u(srcpixels, (GLubyte *)srcaddr + 1, srcWidth, numxpixels, numypixels, 2); + unsigned_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels); blkaddr += 8; @@ -244,8 +228,8 @@ _mesa_texstore_rg_rgtc2(TEXSTORE_PARAMS) } blkaddr += dstRowDiff; } - if (tempImage) - free((void *) tempImage); + + free((void *) tempImage); return GL_TRUE; } @@ -254,7 +238,6 @@ GLboolean _mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS) { GLbyte *dst; - const GLint texWidth = dstRowStride * 4 / 16; /* a bit of a hack */ const GLfloat *tempImage = NULL; int i, j; int numxpixels, numypixels; @@ -263,12 +246,8 @@ _mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS) GLbyte *blkaddr; GLint dstRowDiff; - ASSERT(dstFormat == MESA_FORMAT_SIGNED_RG_RGTC2); - ASSERT(dstXoffset % 4 == 0); - ASSERT(dstYoffset % 4 == 0); - ASSERT(dstZoffset % 4 == 0); - (void) dstZoffset; - (void) dstImageOffsets; + ASSERT(dstFormat == MESA_FORMAT_RG_RGTC2_SNORM || + dstFormat == MESA_FORMAT_LA_LATC2_SNORM); tempImage = _mesa_make_temp_float_image(ctx, dims, baseInternalFormat, @@ -279,12 +258,10 @@ _mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS) if (!tempImage) return GL_FALSE; /* out of memory */ - dst = (GLbyte *)_mesa_compressed_image_address(dstXoffset, dstYoffset, 0, - dstFormat, - texWidth, (GLubyte *) dstAddr); + dst = (GLbyte *) dstSlices[0]; blkaddr = dst; - dstRowDiff = dstRowStride >= (srcWidth * 8) ? dstRowStride - (((srcWidth + 7) & ~7) * 8) : 0; + 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; @@ -294,11 +271,11 @@ _mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS) else numxpixels = srcWidth - i; extractsrc_s(srcpixels, srcaddr, srcWidth, numxpixels, numypixels, 2); - encode_rgtc_chan_s(blkaddr, srcpixels, numxpixels, numypixels); + signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels); blkaddr += 8; extractsrc_s(srcpixels, srcaddr + 1, srcWidth, numxpixels, numypixels, 2); - encode_rgtc_chan_s(blkaddr, srcpixels, numxpixels, numypixels); + signed_encode_rgtc_ubyte(blkaddr, srcpixels, numxpixels, numypixels); blkaddr += 8; srcaddr += numxpixels * 2; @@ -306,817 +283,182 @@ _mesa_texstore_signed_rg_rgtc2(TEXSTORE_PARAMS) } blkaddr += dstRowDiff; } - if (tempImage) - free((void *) tempImage); + + free((void *) tempImage); return GL_TRUE; } -static void _fetch_texel_rgtc_u(GLint srcRowStride, const GLubyte *pixdata, - GLint i, GLint j, GLchan *value, int comps) -{ - GLchan decode; - const GLubyte *blksrc = (pixdata + ((srcRowStride + 3) / 4 * (j / 4) + (i / 4)) * 8 * comps); - const GLubyte alpha0 = blksrc[0]; - const GLubyte alpha1 = blksrc[1]; - const GLubyte bit_pos = ((j&3) * 4 + (i&3)) * 3; - const GLubyte acodelow = blksrc[2 + bit_pos / 8]; - const GLubyte acodehigh = blksrc[3 + bit_pos / 8]; - const GLubyte code = (acodelow >> (bit_pos & 0x7) | - (acodehigh << (8 - (bit_pos & 0x7)))) & 0x7; - - if (code == 0) - decode = UBYTE_TO_CHAN( alpha0 ); - else if (code == 1) - decode = UBYTE_TO_CHAN( alpha1 ); - else if (alpha0 > alpha1) - decode = UBYTE_TO_CHAN( ((alpha0 * (8 - code) + (alpha1 * (code - 1))) / 7) ); - else if (code < 6) - decode = UBYTE_TO_CHAN( ((alpha0 * (6 - code) + (alpha1 * (code - 1))) / 5) ); - else if (code == 6) - decode = 0; - else - decode = CHAN_MAX; - - *value = decode; -} +#define TAG(x) unsigned_##x -static void _fetch_texel_rgtc_s(GLint srcRowStride, const GLbyte *pixdata, - GLint i, GLint j, GLbyte *value, int comps) -{ - GLbyte decode; - const GLbyte *blksrc = (pixdata + ((srcRowStride + 3) / 4 * (j / 4) + (i / 4)) * 8 * comps); - const GLbyte alpha0 = blksrc[0]; - const GLbyte alpha1 = blksrc[1]; - const GLbyte bit_pos = ((j&3) * 4 + (i&3)) * 3; - const GLbyte acodelow = blksrc[2 + bit_pos / 8]; - const GLbyte acodehigh = blksrc[3 + bit_pos / 8]; - const GLbyte code = (acodelow >> (bit_pos & 0x7) | - (acodehigh << (8 - (bit_pos & 0x7)))) & 0x7; - - if (code == 0) - decode = alpha0; - else if (code == 1) - decode = alpha1; - else if (alpha0 > alpha1) - decode = ((alpha0 * (8 - code) + (alpha1 * (code - 1))) / 7); - else if (code < 6) - decode = ((alpha0 * (6 - code) + (alpha1 * (code - 1))) / 5); - else if (code == 6) - decode = -128; - else - decode = 127; - - *value = decode; -} +#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 -void -_mesa_fetch_texel_2d_f_red_rgtc1(const struct gl_texture_image *texImage, - GLint i, GLint j, GLint k, GLfloat *texel) +#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) { - GLchan red; - _fetch_texel_rgtc_u(texImage->RowStride, (GLubyte *)(texImage->Data), - i, j, &red, 1); - texel[RCOMP] = CHAN_TO_FLOAT(red); + 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; } -void -_mesa_fetch_texel_2d_f_signed_red_rgtc1(const struct gl_texture_image *texImage, - GLint i, GLint j, GLint k, GLfloat *texel) +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; - _fetch_texel_rgtc_s(texImage->RowStride, (GLbyte *)(texImage->Data), - i, j, &red, 1); + 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; } -void -_mesa_fetch_texel_2d_f_rg_rgtc2(const struct gl_texture_image *texImage, - GLint i, GLint j, GLint k, GLfloat *texel) +static void +fetch_signed_l_latc1(const GLubyte *map, + GLint rowStride, GLint i, GLint j, GLfloat *texel) { - GLchan red, green; - _fetch_texel_rgtc_u(texImage->RowStride, (GLubyte *)(texImage->Data), - i, j, &red, 2); - _fetch_texel_rgtc_u(texImage->RowStride, (GLubyte *)(texImage->Data) + 8, - i, j, &green, 2); - texel[RCOMP] = CHAN_TO_FLOAT(red); - texel[GCOMP] = CHAN_TO_FLOAT(green); - texel[BCOMP] = 0.0; + 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; } -void -_mesa_fetch_texel_2d_f_signed_rg_rgtc2(const struct gl_texture_image *texImage, - GLint i, GLint j, GLint k, GLfloat *texel) +static void +fetch_rg_rgtc2(const GLubyte *map, + GLint rowStride, GLint i, GLint j, GLfloat *texel) { - GLbyte red, green; - _fetch_texel_rgtc_s(texImage->RowStride, (GLbyte *)(texImage->Data), - i, j, &red, 2); - _fetch_texel_rgtc_s(texImage->RowStride, (GLbyte *)(texImage->Data) + 8, - i, j, &green, 2); - texel[RCOMP] = BYTE_TO_FLOAT_TEX(red); - texel[GCOMP] = BYTE_TO_FLOAT_TEX(green); + 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 write_rgtc_encoded_channel(GLubyte *blkaddr, - GLubyte alphabase1, - GLubyte alphabase2, - GLubyte alphaenc[16]) +static void +fetch_la_latc2(const GLubyte *map, + GLint rowStride, GLint i, GLint j, GLfloat *texel) { - *blkaddr++ = alphabase1; - *blkaddr++ = alphabase2; - *blkaddr++ = alphaenc[0] | (alphaenc[1] << 3) | ((alphaenc[2] & 3) << 6); - *blkaddr++ = (alphaenc[2] >> 2) | (alphaenc[3] << 1) | (alphaenc[4] << 4) | ((alphaenc[5] & 1) << 7); - *blkaddr++ = (alphaenc[5] >> 1) | (alphaenc[6] << 2) | (alphaenc[7] << 5); - *blkaddr++ = alphaenc[8] | (alphaenc[9] << 3) | ((alphaenc[10] & 3) << 6); - *blkaddr++ = (alphaenc[10] >> 2) | (alphaenc[11] << 1) | (alphaenc[12] << 4) | ((alphaenc[13] & 1) << 7); - *blkaddr++ = (alphaenc[13] >> 1) | (alphaenc[14] << 2) | (alphaenc[15] << 5); + 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 encode_rgtc_chan_u(GLubyte *blkaddr, GLubyte srccolors[4][4], - GLint numxpixels, GLint numypixels) -{ - GLubyte alphabase[2], alphause[2]; - GLshort alphatest[2] = { 0 }; - GLuint alphablockerror1, alphablockerror2, alphablockerror3; - GLubyte i, j, aindex, acutValues[7]; - GLubyte alphaenc1[16], alphaenc2[16], alphaenc3[16]; - GLboolean alphaabsmin = GL_FALSE; - GLboolean alphaabsmax = GL_FALSE; - GLshort alphadist; - - /* find lowest and highest alpha value in block, alphabase[0] lowest, alphabase[1] highest */ - alphabase[0] = 0xff; alphabase[1] = 0x0; - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - if (srccolors[j][i] == 0) - alphaabsmin = GL_TRUE; - else if (srccolors[j][i] == 255) - alphaabsmax = GL_TRUE; - else { - if (srccolors[j][i] > alphabase[1]) - alphabase[1] = srccolors[j][i]; - if (srccolors[j][i] < alphabase[0]) - alphabase[0] = srccolors[j][i]; - } - } - } - - - if ((alphabase[0] > alphabase[1]) && !(alphaabsmin && alphaabsmax)) { /* one color, either max or min */ - /* shortcut here since it is a very common case (and also avoids later problems) */ - /* || (alphabase[0] == alphabase[1] && !alphaabsmin && !alphaabsmax) */ - /* could also thest for alpha0 == alpha1 (and not min/max), but probably not common, so don't bother */ - - *blkaddr++ = srccolors[0][0]; - blkaddr++; - *blkaddr++ = 0; - *blkaddr++ = 0; - *blkaddr++ = 0; - *blkaddr++ = 0; - *blkaddr++ = 0; - *blkaddr++ = 0; -#if RGTC_DEBUG - fprintf(stderr, "enc0 used\n"); -#endif - return; - } - - /* find best encoding for alpha0 > alpha1 */ - /* it's possible this encoding is better even if both alphaabsmin and alphaabsmax are true */ - alphablockerror1 = 0x0; - alphablockerror2 = 0xffffffff; - alphablockerror3 = 0xffffffff; - if (alphaabsmin) alphause[0] = 0; - else alphause[0] = alphabase[0]; - if (alphaabsmax) alphause[1] = 255; - else alphause[1] = alphabase[1]; - /* calculate the 7 cut values, just the middle between 2 of the computed alpha values */ - for (aindex = 0; aindex < 7; aindex++) { - /* don't forget here is always rounded down */ - acutValues[aindex] = (alphause[0] * (2*aindex + 1) + alphause[1] * (14 - (2*aindex + 1))) / 14; - } - - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - /* maybe it's overkill to have the most complicated calculation just for the error - calculation which we only need to figure out if encoding1 or encoding2 is better... */ - if (srccolors[j][i] > acutValues[0]) { - alphaenc1[4*j + i] = 0; - alphadist = srccolors[j][i] - alphause[1]; - } - else if (srccolors[j][i] > acutValues[1]) { - alphaenc1[4*j + i] = 2; - alphadist = srccolors[j][i] - (alphause[1] * 6 + alphause[0] * 1) / 7; - } - else if (srccolors[j][i] > acutValues[2]) { - alphaenc1[4*j + i] = 3; - alphadist = srccolors[j][i] - (alphause[1] * 5 + alphause[0] * 2) / 7; - } - else if (srccolors[j][i] > acutValues[3]) { - alphaenc1[4*j + i] = 4; - alphadist = srccolors[j][i] - (alphause[1] * 4 + alphause[0] * 3) / 7; - } - else if (srccolors[j][i] > acutValues[4]) { - alphaenc1[4*j + i] = 5; - alphadist = srccolors[j][i] - (alphause[1] * 3 + alphause[0] * 4) / 7; - } - else if (srccolors[j][i] > acutValues[5]) { - alphaenc1[4*j + i] = 6; - alphadist = srccolors[j][i] - (alphause[1] * 2 + alphause[0] * 5) / 7; - } - else if (srccolors[j][i] > acutValues[6]) { - alphaenc1[4*j + i] = 7; - alphadist = srccolors[j][i] - (alphause[1] * 1 + alphause[0] * 6) / 7; - } - else { - alphaenc1[4*j + i] = 1; - alphadist = srccolors[j][i] - alphause[0]; - } - alphablockerror1 += alphadist * alphadist; - } - } -#if RGTC_DEBUG - for (i = 0; i < 16; i++) { - fprintf(stderr, "%d ", alphaenc1[i]); - } - fprintf(stderr, "cutVals "); - for (i = 0; i < 8; i++) { - fprintf(stderr, "%d ", acutValues[i]); - } - fprintf(stderr, "srcVals "); - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - fprintf(stderr, "%d ", srccolors[j][i]); - } - } - fprintf(stderr, "\n"); -#endif - - /* it's not very likely this encoding is better if both alphaabsmin and alphaabsmax - are false but try it anyway */ - if (alphablockerror1 >= 32) { - - /* don't bother if encoding is already very good, this condition should also imply - we have valid alphabase colors which we absolutely need (alphabase[0] <= alphabase[1]) */ - alphablockerror2 = 0; - for (aindex = 0; aindex < 5; aindex++) { - /* don't forget here is always rounded down */ - acutValues[aindex] = (alphabase[0] * (10 - (2*aindex + 1)) + alphabase[1] * (2*aindex + 1)) / 10; - } - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - /* maybe it's overkill to have the most complicated calculation just for the error - calculation which we only need to figure out if encoding1 or encoding2 is better... */ - if (srccolors[j][i] == 0) { - alphaenc2[4*j + i] = 6; - alphadist = 0; - } - else if (srccolors[j][i] == 255) { - alphaenc2[4*j + i] = 7; - alphadist = 0; - } - else if (srccolors[j][i] <= acutValues[0]) { - alphaenc2[4*j + i] = 0; - alphadist = srccolors[j][i] - alphabase[0]; - } - else if (srccolors[j][i] <= acutValues[1]) { - alphaenc2[4*j + i] = 2; - alphadist = srccolors[j][i] - (alphabase[0] * 4 + alphabase[1] * 1) / 5; - } - else if (srccolors[j][i] <= acutValues[2]) { - alphaenc2[4*j + i] = 3; - alphadist = srccolors[j][i] - (alphabase[0] * 3 + alphabase[1] * 2) / 5; - } - else if (srccolors[j][i] <= acutValues[3]) { - alphaenc2[4*j + i] = 4; - alphadist = srccolors[j][i] - (alphabase[0] * 2 + alphabase[1] * 3) / 5; - } - else if (srccolors[j][i] <= acutValues[4]) { - alphaenc2[4*j + i] = 5; - alphadist = srccolors[j][i] - (alphabase[0] * 1 + alphabase[1] * 4) / 5; - } - else { - alphaenc2[4*j + i] = 1; - alphadist = srccolors[j][i] - alphabase[1]; - } - alphablockerror2 += alphadist * alphadist; - } - } - - - /* skip this if the error is already very small - this encoding is MUCH better on average than #2 though, but expensive! */ - if ((alphablockerror2 > 96) && (alphablockerror1 > 96)) { - GLshort blockerrlin1 = 0; - GLshort blockerrlin2 = 0; - GLubyte nralphainrangelow = 0; - GLubyte nralphainrangehigh = 0; - alphatest[0] = 0xff; - alphatest[1] = 0x0; - /* if we have large range it's likely there are values close to 0/255, try to map them to 0/255 */ - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - if ((srccolors[j][i] > alphatest[1]) && (srccolors[j][i] < (255 -(alphabase[1] - alphabase[0]) / 28))) - alphatest[1] = srccolors[j][i]; - if ((srccolors[j][i] < alphatest[0]) && (srccolors[j][i] > (alphabase[1] - alphabase[0]) / 28)) - alphatest[0] = srccolors[j][i]; - } - } - /* shouldn't happen too often, don't really care about those degenerated cases */ - if (alphatest[1] <= alphatest[0]) { - alphatest[0] = 1; - alphatest[1] = 254; - } - for (aindex = 0; aindex < 5; aindex++) { - /* don't forget here is always rounded down */ - acutValues[aindex] = (alphatest[0] * (10 - (2*aindex + 1)) + alphatest[1] * (2*aindex + 1)) / 10; - } - - /* find the "average" difference between the alpha values and the next encoded value. - This is then used to calculate new base values. - Should there be some weighting, i.e. those values closer to alphatest[x] have more weight, - since they will see more improvement, and also because the values in the middle are somewhat - likely to get no improvement at all (because the base values might move in different directions)? - OTOH it would mean the values in the middle are even less likely to get an improvement - */ - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - if (srccolors[j][i] <= alphatest[0] / 2) { - } - else if (srccolors[j][i] > ((255 + alphatest[1]) / 2)) { - } - else if (srccolors[j][i] <= acutValues[0]) { - blockerrlin1 += (srccolors[j][i] - alphatest[0]); - nralphainrangelow += 1; - } - else if (srccolors[j][i] <= acutValues[1]) { - blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5); - blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5); - nralphainrangelow += 1; - nralphainrangehigh += 1; - } - else if (srccolors[j][i] <= acutValues[2]) { - blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5); - blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5); - nralphainrangelow += 1; - nralphainrangehigh += 1; - } - else if (srccolors[j][i] <= acutValues[3]) { - blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5); - blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5); - nralphainrangelow += 1; - nralphainrangehigh += 1; - } - else if (srccolors[j][i] <= acutValues[4]) { - blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5); - blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5); - nralphainrangelow += 1; - nralphainrangehigh += 1; - } - else { - blockerrlin2 += (srccolors[j][i] - alphatest[1]); - nralphainrangehigh += 1; - } - } - } - /* shouldn't happen often, needed to avoid div by zero */ - if (nralphainrangelow == 0) nralphainrangelow = 1; - if (nralphainrangehigh == 0) nralphainrangehigh = 1; - alphatest[0] = alphatest[0] + (blockerrlin1 / nralphainrangelow); -#if RGTC_DEBUG - fprintf(stderr, "block err lin low %d, nr %d\n", blockerrlin1, nralphainrangelow); - fprintf(stderr, "block err lin high %d, nr %d\n", blockerrlin2, nralphainrangehigh); -#endif - /* again shouldn't really happen often... */ - if (alphatest[0] < 0) { - alphatest[0] = 0; - } - alphatest[1] = alphatest[1] + (blockerrlin2 / nralphainrangehigh); - if (alphatest[1] > 255) { - alphatest[1] = 255; - } - - alphablockerror3 = 0; - for (aindex = 0; aindex < 5; aindex++) { - /* don't forget here is always rounded down */ - acutValues[aindex] = (alphatest[0] * (10 - (2*aindex + 1)) + alphatest[1] * (2*aindex + 1)) / 10; - } - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - /* maybe it's overkill to have the most complicated calculation just for the error - calculation which we only need to figure out if encoding1 or encoding2 is better... */ - if (srccolors[j][i] <= alphatest[0] / 2) { - alphaenc3[4*j + i] = 6; - alphadist = srccolors[j][i]; - } - else if (srccolors[j][i] > ((255 + alphatest[1]) / 2)) { - alphaenc3[4*j + i] = 7; - alphadist = 255 - srccolors[j][i]; - } - else if (srccolors[j][i] <= acutValues[0]) { - alphaenc3[4*j + i] = 0; - alphadist = srccolors[j][i] - alphatest[0]; - } - else if (srccolors[j][i] <= acutValues[1]) { - alphaenc3[4*j + i] = 2; - alphadist = srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5; - } - else if (srccolors[j][i] <= acutValues[2]) { - alphaenc3[4*j + i] = 3; - alphadist = srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5; - } - else if (srccolors[j][i] <= acutValues[3]) { - alphaenc3[4*j + i] = 4; - alphadist = srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5; - } - else if (srccolors[j][i] <= acutValues[4]) { - alphaenc3[4*j + i] = 5; - alphadist = srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5; - } - else { - alphaenc3[4*j + i] = 1; - alphadist = srccolors[j][i] - alphatest[1]; - } - alphablockerror3 += alphadist * alphadist; - } - } - } - } - /* write the alpha values and encoding back. */ - if ((alphablockerror1 <= alphablockerror2) && (alphablockerror1 <= alphablockerror3)) { -#if RGTC_DEBUG - if (alphablockerror1 > 96) fprintf(stderr, "enc1 used, error %d\n", alphablockerror1); -#endif - write_rgtc_encoded_channel( blkaddr, alphause[1], alphause[0], alphaenc1 ); - } - else if (alphablockerror2 <= alphablockerror3) { -#if RGTC_DEBUG - if (alphablockerror2 > 96) fprintf(stderr, "enc2 used, error %d\n", alphablockerror2); -#endif - write_rgtc_encoded_channel( blkaddr, alphabase[0], alphabase[1], alphaenc2 ); - } - else { -#if RGTC_DEBUG - fprintf(stderr, "enc3 used, error %d\n", alphablockerror3); -#endif - write_rgtc_encoded_channel( blkaddr, (GLubyte)alphatest[0], (GLubyte)alphatest[1], alphaenc3 ); - } +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 write_rgtc_encoded_channel_s(GLbyte *blkaddr, - GLbyte alphabase1, - GLbyte alphabase2, - GLbyte alphaenc[16]) +static void +fetch_signed_la_latc2(const GLubyte *map, + GLint rowStride, GLint i, GLint j, GLfloat *texel) { - *blkaddr++ = alphabase1; - *blkaddr++ = alphabase2; - *blkaddr++ = alphaenc[0] | (alphaenc[1] << 3) | ((alphaenc[2] & 3) << 6); - *blkaddr++ = (alphaenc[2] >> 2) | (alphaenc[3] << 1) | (alphaenc[4] << 4) | ((alphaenc[5] & 1) << 7); - *blkaddr++ = (alphaenc[5] >> 1) | (alphaenc[6] << 2) | (alphaenc[7] << 5); - *blkaddr++ = alphaenc[8] | (alphaenc[9] << 3) | ((alphaenc[10] & 3) << 6); - *blkaddr++ = (alphaenc[10] >> 2) | (alphaenc[11] << 1) | (alphaenc[12] << 4) | ((alphaenc[13] & 1) << 7); - *blkaddr++ = (alphaenc[13] >> 1) | (alphaenc[14] << 2) | (alphaenc[15] << 5); + 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); } -static void encode_rgtc_chan_s(GLbyte *blkaddr, GLbyte srccolors[4][4], - GLint numxpixels, GLint numypixels) -{ - GLbyte alphabase[2], alphause[2]; - GLshort alphatest[2] = { 0 }; - GLuint alphablockerror1, alphablockerror2, alphablockerror3; - GLbyte i, j, aindex, acutValues[7]; - GLbyte alphaenc1[16], alphaenc2[16], alphaenc3[16]; - GLboolean alphaabsmin = GL_FALSE; - GLboolean alphaabsmax = GL_FALSE; - GLshort alphadist; - - /* find lowest and highest alpha value in block, alphabase[0] lowest, alphabase[1] highest */ - alphabase[0] = 0xff; alphabase[1] = 0x0; - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - if (srccolors[j][i] == 0) - alphaabsmin = GL_TRUE; - else if (srccolors[j][i] == 255) - alphaabsmax = GL_TRUE; - else { - if (srccolors[j][i] > alphabase[1]) - alphabase[1] = srccolors[j][i]; - if (srccolors[j][i] < alphabase[0]) - alphabase[0] = srccolors[j][i]; - } - } - } - - - if ((alphabase[0] > alphabase[1]) && !(alphaabsmin && alphaabsmax)) { /* one color, either max or min */ - /* shortcut here since it is a very common case (and also avoids later problems) */ - /* || (alphabase[0] == alphabase[1] && !alphaabsmin && !alphaabsmax) */ - /* could also thest for alpha0 == alpha1 (and not min/max), but probably not common, so don't bother */ - - *blkaddr++ = srccolors[0][0]; - blkaddr++; - *blkaddr++ = 0; - *blkaddr++ = 0; - *blkaddr++ = 0; - *blkaddr++ = 0; - *blkaddr++ = 0; - *blkaddr++ = 0; -#if RGTC_DEBUG - fprintf(stderr, "enc0 used\n"); -#endif - return; - } - - /* find best encoding for alpha0 > alpha1 */ - /* it's possible this encoding is better even if both alphaabsmin and alphaabsmax are true */ - alphablockerror1 = 0x0; - alphablockerror2 = 0xffffffff; - alphablockerror3 = 0xffffffff; - if (alphaabsmin) alphause[0] = 0; - else alphause[0] = alphabase[0]; - if (alphaabsmax) alphause[1] = 255; - else alphause[1] = alphabase[1]; - /* calculate the 7 cut values, just the middle between 2 of the computed alpha values */ - for (aindex = 0; aindex < 7; aindex++) { - /* don't forget here is always rounded down */ - acutValues[aindex] = (alphause[0] * (2*aindex + 1) + alphause[1] * (14 - (2*aindex + 1))) / 14; - } - - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - /* maybe it's overkill to have the most complicated calculation just for the error - calculation which we only need to figure out if encoding1 or encoding2 is better... */ - if (srccolors[j][i] > acutValues[0]) { - alphaenc1[4*j + i] = 0; - alphadist = srccolors[j][i] - alphause[1]; - } - else if (srccolors[j][i] > acutValues[1]) { - alphaenc1[4*j + i] = 2; - alphadist = srccolors[j][i] - (alphause[1] * 6 + alphause[0] * 1) / 7; - } - else if (srccolors[j][i] > acutValues[2]) { - alphaenc1[4*j + i] = 3; - alphadist = srccolors[j][i] - (alphause[1] * 5 + alphause[0] * 2) / 7; - } - else if (srccolors[j][i] > acutValues[3]) { - alphaenc1[4*j + i] = 4; - alphadist = srccolors[j][i] - (alphause[1] * 4 + alphause[0] * 3) / 7; - } - else if (srccolors[j][i] > acutValues[4]) { - alphaenc1[4*j + i] = 5; - alphadist = srccolors[j][i] - (alphause[1] * 3 + alphause[0] * 4) / 7; - } - else if (srccolors[j][i] > acutValues[5]) { - alphaenc1[4*j + i] = 6; - alphadist = srccolors[j][i] - (alphause[1] * 2 + alphause[0] * 5) / 7; - } - else if (srccolors[j][i] > acutValues[6]) { - alphaenc1[4*j + i] = 7; - alphadist = srccolors[j][i] - (alphause[1] * 1 + alphause[0] * 6) / 7; - } - else { - alphaenc1[4*j + i] = 1; - alphadist = srccolors[j][i] - alphause[0]; - } - alphablockerror1 += alphadist * alphadist; - } - } -#if RGTC_DEBUG - for (i = 0; i < 16; i++) { - fprintf(stderr, "%d ", alphaenc1[i]); - } - fprintf(stderr, "cutVals "); - for (i = 0; i < 8; i++) { - fprintf(stderr, "%d ", acutValues[i]); - } - fprintf(stderr, "srcVals "); - for (j = 0; j < numypixels; j++) - for (i = 0; i < numxpixels; i++) { - fprintf(stderr, "%d ", srccolors[j][i]); - } - - fprintf(stderr, "\n"); -#endif - - /* it's not very likely this encoding is better if both alphaabsmin and alphaabsmax - are false but try it anyway */ - if (alphablockerror1 >= 32) { - - /* don't bother if encoding is already very good, this condition should also imply - we have valid alphabase colors which we absolutely need (alphabase[0] <= alphabase[1]) */ - alphablockerror2 = 0; - for (aindex = 0; aindex < 5; aindex++) { - /* don't forget here is always rounded down */ - acutValues[aindex] = (alphabase[0] * (10 - (2*aindex + 1)) + alphabase[1] * (2*aindex + 1)) / 10; - } - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - /* maybe it's overkill to have the most complicated calculation just for the error - calculation which we only need to figure out if encoding1 or encoding2 is better... */ - if (srccolors[j][i] == 0) { - alphaenc2[4*j + i] = 6; - alphadist = 0; - } - else if (srccolors[j][i] == 255) { - alphaenc2[4*j + i] = 7; - alphadist = 0; - } - else if (srccolors[j][i] <= acutValues[0]) { - alphaenc2[4*j + i] = 0; - alphadist = srccolors[j][i] - alphabase[0]; - } - else if (srccolors[j][i] <= acutValues[1]) { - alphaenc2[4*j + i] = 2; - alphadist = srccolors[j][i] - (alphabase[0] * 4 + alphabase[1] * 1) / 5; - } - else if (srccolors[j][i] <= acutValues[2]) { - alphaenc2[4*j + i] = 3; - alphadist = srccolors[j][i] - (alphabase[0] * 3 + alphabase[1] * 2) / 5; - } - else if (srccolors[j][i] <= acutValues[3]) { - alphaenc2[4*j + i] = 4; - alphadist = srccolors[j][i] - (alphabase[0] * 2 + alphabase[1] * 3) / 5; - } - else if (srccolors[j][i] <= acutValues[4]) { - alphaenc2[4*j + i] = 5; - alphadist = srccolors[j][i] - (alphabase[0] * 1 + alphabase[1] * 4) / 5; - } - else { - alphaenc2[4*j + i] = 1; - alphadist = srccolors[j][i] - alphabase[1]; - } - alphablockerror2 += alphadist * alphadist; - } - } - - /* skip this if the error is already very small - this encoding is MUCH better on average than #2 though, but expensive! */ - if ((alphablockerror2 > 96) && (alphablockerror1 > 96)) { - GLshort blockerrlin1 = 0; - GLshort blockerrlin2 = 0; - GLubyte nralphainrangelow = 0; - GLubyte nralphainrangehigh = 0; - alphatest[0] = 0xff; - alphatest[1] = 0x0; - /* if we have large range it's likely there are values close to 0/255, try to map them to 0/255 */ - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - if ((srccolors[j][i] > alphatest[1]) && (srccolors[j][i] < (255 -(alphabase[1] - alphabase[0]) / 28))) - alphatest[1] = srccolors[j][i]; - if ((srccolors[j][i] < alphatest[0]) && (srccolors[j][i] > (alphabase[1] - alphabase[0]) / 28)) - alphatest[0] = srccolors[j][i]; - } - } - /* shouldn't happen too often, don't really care about those degenerated cases */ - if (alphatest[1] <= alphatest[0]) { - alphatest[0] = 1; - alphatest[1] = 254; - } - for (aindex = 0; aindex < 5; aindex++) { - /* don't forget here is always rounded down */ - acutValues[aindex] = (alphatest[0] * (10 - (2*aindex + 1)) + alphatest[1] * (2*aindex + 1)) / 10; - } - - /* find the "average" difference between the alpha values and the next encoded value. - This is then used to calculate new base values. - Should there be some weighting, i.e. those values closer to alphatest[x] have more weight, - since they will see more improvement, and also because the values in the middle are somewhat - likely to get no improvement at all (because the base values might move in different directions)? - OTOH it would mean the values in the middle are even less likely to get an improvement - */ - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - if (srccolors[j][i] <= alphatest[0] / 2) { - } - else if (srccolors[j][i] > ((255 + alphatest[1]) / 2)) { - } - else if (srccolors[j][i] <= acutValues[0]) { - blockerrlin1 += (srccolors[j][i] - alphatest[0]); - nralphainrangelow += 1; - } - else if (srccolors[j][i] <= acutValues[1]) { - blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5); - blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5); - nralphainrangelow += 1; - nralphainrangehigh += 1; - } - else if (srccolors[j][i] <= acutValues[2]) { - blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5); - blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5); - nralphainrangelow += 1; - nralphainrangehigh += 1; - } - else if (srccolors[j][i] <= acutValues[3]) { - blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5); - blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5); - nralphainrangelow += 1; - nralphainrangehigh += 1; - } - else if (srccolors[j][i] <= acutValues[4]) { - blockerrlin1 += (srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5); - blockerrlin2 += (srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5); - nralphainrangelow += 1; - nralphainrangehigh += 1; - } - else { - blockerrlin2 += (srccolors[j][i] - alphatest[1]); - nralphainrangehigh += 1; - } - } - } - /* shouldn't happen often, needed to avoid div by zero */ - if (nralphainrangelow == 0) nralphainrangelow = 1; - if (nralphainrangehigh == 0) nralphainrangehigh = 1; - alphatest[0] = alphatest[0] + (blockerrlin1 / nralphainrangelow); -#if RGTC_DEBUG - fprintf(stderr, "block err lin low %d, nr %d\n", blockerrlin1, nralphainrangelow); - fprintf(stderr, "block err lin high %d, nr %d\n", blockerrlin2, nralphainrangehigh); -#endif - /* again shouldn't really happen often... */ - if (alphatest[0] < 0) { - alphatest[0] = 0; - } - alphatest[1] = alphatest[1] + (blockerrlin2 / nralphainrangehigh); - if (alphatest[1] > 255) { - alphatest[1] = 255; - } - - alphablockerror3 = 0; - for (aindex = 0; aindex < 5; aindex++) { - /* don't forget here is always rounded down */ - acutValues[aindex] = (alphatest[0] * (10 - (2*aindex + 1)) + alphatest[1] * (2*aindex + 1)) / 10; - } - for (j = 0; j < numypixels; j++) { - for (i = 0; i < numxpixels; i++) { - /* maybe it's overkill to have the most complicated calculation just for the error - calculation which we only need to figure out if encoding1 or encoding2 is better... */ - if (srccolors[j][i] <= alphatest[0] / 2) { - alphaenc3[4*j + i] = 6; - alphadist = srccolors[j][i]; - } - else if (srccolors[j][i] > ((255 + alphatest[1]) / 2)) { - alphaenc3[4*j + i] = 7; - alphadist = 255 - srccolors[j][i]; - } - else if (srccolors[j][i] <= acutValues[0]) { - alphaenc3[4*j + i] = 0; - alphadist = srccolors[j][i] - alphatest[0]; - } - else if (srccolors[j][i] <= acutValues[1]) { - alphaenc3[4*j + i] = 2; - alphadist = srccolors[j][i] - (alphatest[0] * 4 + alphatest[1] * 1) / 5; - } - else if (srccolors[j][i] <= acutValues[2]) { - alphaenc3[4*j + i] = 3; - alphadist = srccolors[j][i] - (alphatest[0] * 3 + alphatest[1] * 2) / 5; - } - else if (srccolors[j][i] <= acutValues[3]) { - alphaenc3[4*j + i] = 4; - alphadist = srccolors[j][i] - (alphatest[0] * 2 + alphatest[1] * 3) / 5; - } - else if (srccolors[j][i] <= acutValues[4]) { - alphaenc3[4*j + i] = 5; - alphadist = srccolors[j][i] - (alphatest[0] * 1 + alphatest[1] * 4) / 5; - } - else { - alphaenc3[4*j + i] = 1; - alphadist = srccolors[j][i] - alphatest[1]; - } - alphablockerror3 += alphadist * alphadist; - } - } - } - } - /* write the alpha values and encoding back. */ - if ((alphablockerror1 <= alphablockerror2) && (alphablockerror1 <= alphablockerror3)) { -#if RGTC_DEBUG - if (alphablockerror1 > 96) fprintf(stderr, "enc1 used, error %d\n", alphablockerror1); -#endif - write_rgtc_encoded_channel_s( blkaddr, alphause[1], alphause[0], alphaenc1 ); - } - else if (alphablockerror2 <= alphablockerror3) { -#if RGTC_DEBUG - if (alphablockerror2 > 96) fprintf(stderr, "enc2 used, error %d\n", alphablockerror2); -#endif - write_rgtc_encoded_channel_s( blkaddr, alphabase[0], alphabase[1], alphaenc2 ); - } - else { -#if RGTC_DEBUG - fprintf(stderr, "enc3 used, error %d\n", alphablockerror3); -#endif - write_rgtc_encoded_channel_s( blkaddr, (GLubyte)alphatest[0], (GLubyte)alphatest[1], alphaenc3 ); +compressed_fetch_func +_mesa_get_compressed_rgtc_func(mesa_format format) +{ + switch (format) { + case MESA_FORMAT_R_RGTC1_UNORM: + return fetch_red_rgtc1; + case MESA_FORMAT_L_LATC1_UNORM: + return fetch_l_latc1; + case MESA_FORMAT_R_RGTC1_SNORM: + return fetch_signed_red_rgtc1; + case MESA_FORMAT_L_LATC1_SNORM: + return fetch_signed_l_latc1; + case MESA_FORMAT_RG_RGTC2_UNORM: + return fetch_rg_rgtc2; + case MESA_FORMAT_LA_LATC2_UNORM: + return fetch_la_latc2; + case MESA_FORMAT_RG_RGTC2_SNORM: + return fetch_signed_rg_rgtc2; + case MESA_FORMAT_LA_LATC2_SNORM: + return fetch_signed_la_latc2; + default: + return NULL; } }