/*
* Mesa 3-D graphics library
- * Version: 7.1
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* 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
- * BRIAN PAUL 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.
+ * 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.
*/
/**
* \file texcompress_fxt1.c
- * GL_EXT_texture_compression_fxt1 support.
+ * GL_3DFX_texture_compression_FXT1 support.
*/
+#include "errors.h"
#include "glheader.h"
#include "imports.h"
-#include "colormac.h"
-#include "context.h"
-#include "convolve.h"
#include "image.h"
+#include "macros.h"
#include "mipmap.h"
#include "texcompress.h"
#include "texcompress_fxt1.h"
#include "texstore.h"
-
-
-#if FEATURE_texture_fxt1
+#include "mtypes.h"
static void
const void *source, GLint srcRowStride,
void *dest, GLint destRowStride);
-void
+static void
fxt1_decode_1 (const void *texture, GLint stride,
- GLint i, GLint j, GLchan *rgba);
+ GLint i, GLint j, GLubyte *rgba);
/**
GLboolean
_mesa_texstore_rgb_fxt1(TEXSTORE_PARAMS)
{
- const GLchan *pixels;
+ const GLubyte *pixels;
GLint srcRowStride;
GLubyte *dst;
- const GLint texWidth = dstRowStride * 8 / 16; /* a bit of a hack */
- const GLchan *tempImage = NULL;
+ const GLubyte *tempImage = NULL;
- ASSERT(dstFormat == MESA_FORMAT_RGB_FXT1);
- ASSERT(dstXoffset % 8 == 0);
- ASSERT(dstYoffset % 4 == 0);
- ASSERT(dstZoffset == 0);
- (void) dstZoffset;
- (void) dstImageOffsets;
+ assert(dstFormat == MESA_FORMAT_RGB_FXT1);
if (srcFormat != GL_RGB ||
- srcType != CHAN_TYPE ||
+ srcType != GL_UNSIGNED_BYTE ||
ctx->_ImageTransferState ||
+ ALIGN(srcPacking->RowLength, srcPacking->Alignment) != srcWidth ||
srcPacking->SwapBytes) {
- /* convert image to RGB/GLchan */
- tempImage = _mesa_make_temp_chan_image(ctx, dims,
- baseInternalFormat,
- _mesa_get_format_base_format(dstFormat),
- srcWidth, srcHeight, srcDepth,
- srcFormat, srcType, srcAddr,
- srcPacking);
+ /* convert image to RGB/GLubyte */
+ GLubyte *tempImageSlices[1];
+ int rgbRowStride = 3 * srcWidth * sizeof(GLubyte);
+ tempImage = malloc(srcWidth * srcHeight * 3 * sizeof(GLubyte));
if (!tempImage)
return GL_FALSE; /* out of memory */
- _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
+ tempImageSlices[0] = (GLubyte *) tempImage;
+ _mesa_texstore(ctx, dims,
+ baseInternalFormat,
+ MESA_FORMAT_RGB_UNORM8,
+ rgbRowStride, tempImageSlices,
+ srcWidth, srcHeight, srcDepth,
+ srcFormat, srcType, srcAddr,
+ srcPacking);
pixels = tempImage;
srcRowStride = 3 * srcWidth;
srcFormat = GL_RGB;
}
else {
- pixels = (const GLchan *) srcAddr;
+ pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight,
+ srcFormat, srcType, 0, 0);
+
srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat,
- srcType) / sizeof(GLchan);
+ srcType) / sizeof(GLubyte);
}
- dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
- dstFormat,
- texWidth, (GLubyte *) dstAddr);
+ dst = dstSlices[0];
fxt1_encode(srcWidth, srcHeight, 3, pixels, srcRowStride,
dst, dstRowStride);
- if (tempImage)
- _mesa_free((void*) tempImage);
+ free((void*) tempImage);
return GL_TRUE;
}
GLboolean
_mesa_texstore_rgba_fxt1(TEXSTORE_PARAMS)
{
- const GLchan *pixels;
+ const GLubyte *pixels;
GLint srcRowStride;
GLubyte *dst;
- GLint texWidth = dstRowStride * 8 / 16; /* a bit of a hack */
- const GLchan *tempImage = NULL;
+ const GLubyte *tempImage = NULL;
- ASSERT(dstFormat == MESA_FORMAT_RGBA_FXT1);
- ASSERT(dstXoffset % 8 == 0);
- ASSERT(dstYoffset % 4 == 0);
- ASSERT(dstZoffset == 0);
- (void) dstZoffset;
- (void) dstImageOffsets;
+ assert(dstFormat == MESA_FORMAT_RGBA_FXT1);
if (srcFormat != GL_RGBA ||
- srcType != CHAN_TYPE ||
+ srcType != GL_UNSIGNED_BYTE ||
ctx->_ImageTransferState ||
srcPacking->SwapBytes) {
- /* convert image to RGBA/GLchan */
- tempImage = _mesa_make_temp_chan_image(ctx, dims,
- baseInternalFormat,
- _mesa_get_format_base_format(dstFormat),
- srcWidth, srcHeight, srcDepth,
- srcFormat, srcType, srcAddr,
- srcPacking);
+ /* convert image to RGBA/GLubyte */
+ GLubyte *tempImageSlices[1];
+ int rgbaRowStride = 4 * srcWidth * sizeof(GLubyte);
+ tempImage = malloc(srcWidth * srcHeight * 4 * sizeof(GLubyte));
if (!tempImage)
return GL_FALSE; /* out of memory */
- _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight);
+ tempImageSlices[0] = (GLubyte *) tempImage;
+ _mesa_texstore(ctx, dims,
+ baseInternalFormat,
+#if UTIL_ARCH_LITTLE_ENDIAN
+ MESA_FORMAT_R8G8B8A8_UNORM,
+#else
+ MESA_FORMAT_A8B8G8R8_UNORM,
+#endif
+ rgbaRowStride, tempImageSlices,
+ srcWidth, srcHeight, srcDepth,
+ srcFormat, srcType, srcAddr,
+ srcPacking);
pixels = tempImage;
srcRowStride = 4 * srcWidth;
srcFormat = GL_RGBA;
}
else {
- pixels = (const GLchan *) srcAddr;
+ pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight,
+ srcFormat, srcType, 0, 0);
+
srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat,
- srcType) / sizeof(GLchan);
+ srcType) / sizeof(GLubyte);
}
- dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
- dstFormat,
- texWidth, (GLubyte *) dstAddr);
+ dst = dstSlices[0];
fxt1_encode(srcWidth, srcHeight, 4, pixels, srcRowStride,
dst, dstRowStride);
- if (tempImage)
- _mesa_free((void*) tempImage);
+ free((void*) tempImage);
return GL_TRUE;
}
-void
-_mesa_fetch_texel_2d_f_rgba_fxt1( const struct gl_texture_image *texImage,
- GLint i, GLint j, GLint k, GLfloat *texel )
-{
- /* just sample as GLchan and convert to float here */
- GLchan rgba[4];
- (void) k;
- fxt1_decode_1(texImage->Data, texImage->RowStride, i, j, rgba);
- texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]);
- texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]);
- texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]);
- texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]);
-}
-
-
-void
-_mesa_fetch_texel_2d_f_rgb_fxt1( const struct gl_texture_image *texImage,
- GLint i, GLint j, GLint k, GLfloat *texel )
-{
- /* just sample as GLchan and convert to float here */
- GLchan rgba[4];
- (void) k;
- fxt1_decode_1(texImage->Data, texImage->RowStride, i, j, rgba);
- texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]);
- texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]);
- texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]);
- texel[ACOMP] = 1.0F;
-}
-
-
-
/***************************************************************************\
* FXT1 encoder
*
#define LL_RMS_D 10 /* fault tolerance (maximum delta) */
#define LL_RMS_E 255 /* fault tolerance (maximum error) */
#define ALPHA_TS 2 /* alpha threshold: (255 - ALPHA_TS) deemed opaque */
-#define ISTBLACK(v) (*((GLuint *)(v)) == 0)
-
+static const GLuint zero = 0;
+#define ISTBLACK(v) (memcmp(&(v), &zero, sizeof(zero)) == 0)
/*
* Define a 64-bit unsigned integer type and macros
} hist[N_TEXELS];
GLint lenh = 0;
- _mesa_memset(hist, 0, sizeof(hist));
+ memset(hist, 0, sizeof(hist));
for (k = 0; k < n; k++) {
GLint l;
* for each sample color
* sort to nearest vector.
*
- * replace each vector with the centroid of it's matching colors.
+ * replace each vector with the centroid of its matching colors.
*
* repeat until RMS doesn't improve.
*
#else
GLint best = fxt1_bestcol(vec, nv, input[k], nc, &err);
#endif
+ assert(best >= 0);
/* add in closest color */
for (i = 0; i < nc; i++) {
sum[best][i] += input[k][i];
if (comps == 3) {
/* make the whole block opaque */
- _mesa_memset(input, -1, sizeof(input));
+ memset(input, -1, sizeof(input));
}
/* 8 texels each line */
}
+
+/**
+ * Upscale an image by replication, not (typical) stretching.
+ * We use this when the image width or height is less than a
+ * certain size (4, 8) and we need to upscale an image.
+ */
+static void
+upscale_teximage2d(GLsizei inWidth, GLsizei inHeight,
+ GLsizei outWidth, GLsizei outHeight,
+ GLint comps, const GLubyte *src, GLint srcRowStride,
+ GLubyte *dest )
+{
+ GLint i, j, k;
+
+ assert(outWidth >= inWidth);
+ assert(outHeight >= inHeight);
+#if 0
+ assert(inWidth == 1 || inWidth == 2 || inHeight == 1 || inHeight == 2);
+ assert((outWidth & 3) == 0);
+ assert((outHeight & 3) == 0);
+#endif
+
+ for (i = 0; i < outHeight; i++) {
+ const GLint ii = i % inHeight;
+ for (j = 0; j < outWidth; j++) {
+ const GLint jj = j % inWidth;
+ for (k = 0; k < comps; k++) {
+ dest[(i * outWidth + j) * comps + k]
+ = src[ii * srcRowStride + jj * comps + k];
+ }
+ }
+ }
+}
+
+
static void
fxt1_encode (GLuint width, GLuint height, GLint comps,
const void *source, GLint srcRowStride,
if ((width & 7) | (height & 3)) {
GLint newWidth = (width + 7) & ~7;
GLint newHeight = (height + 3) & ~3;
- newSource = _mesa_malloc(comps * newWidth * newHeight * sizeof(GLchan));
+ newSource = malloc(comps * newWidth * newHeight * sizeof(GLubyte));
if (!newSource) {
GET_CURRENT_CONTEXT(ctx);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "texture compression");
goto cleanUp;
}
- _mesa_upscale_teximage2d(width, height, newWidth, newHeight,
- comps, (const GLchan *) source,
- srcRowStride, (GLchan *) newSource);
+ upscale_teximage2d(width, height, newWidth, newHeight,
+ comps, (const GLubyte *) source,
+ srcRowStride, (GLubyte *) newSource);
source = newSource;
width = newWidth;
height = newHeight;
srcRowStride = comps * newWidth;
}
- /* convert from 16/32-bit channels to GLubyte if needed */
- if (CHAN_TYPE != GL_UNSIGNED_BYTE) {
- const GLuint n = width * height * comps;
- const GLchan *src = (const GLchan *) source;
- GLubyte *dest = (GLubyte *) _mesa_malloc(n * sizeof(GLubyte));
- GLuint i;
- if (!dest) {
- GET_CURRENT_CONTEXT(ctx);
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "texture compression");
- goto cleanUp;
- }
- for (i = 0; i < n; i++) {
- dest[i] = CHAN_TO_UBYTE(src[i]);
- }
- if (newSource != NULL) {
- _mesa_free(newSource);
- }
- newSource = dest; /* we'll free this buffer before returning */
- source = dest; /* the new, GLubyte incoming image */
- }
-
data = (const GLubyte *) source;
destRowStride = (destRowStride - width * 2) / 4;
for (y = 0; y < height; y += 4) {
}
cleanUp:
- if (newSource != NULL) {
- _mesa_free(newSource);
- }
+ free(newSource);
}
static void
-fxt1_decode_1HI (const GLubyte *code, GLint t, GLchan *rgba)
+fxt1_decode_1HI (const GLubyte *code, GLint t, GLubyte *rgba)
{
const GLuint *cc;
g = LERP(6, t, UP5(CC_SEL(cc, 5)), UP5(CC_SEL(cc, 20)));
r = LERP(6, t, UP5(CC_SEL(cc, 10)), UP5(CC_SEL(cc, 25)));
}
- rgba[RCOMP] = UBYTE_TO_CHAN(r);
- rgba[GCOMP] = UBYTE_TO_CHAN(g);
- rgba[BCOMP] = UBYTE_TO_CHAN(b);
- rgba[ACOMP] = CHAN_MAX;
+ rgba[RCOMP] = r;
+ rgba[GCOMP] = g;
+ rgba[BCOMP] = b;
+ rgba[ACOMP] = 255;
}
}
static void
-fxt1_decode_1CHROMA (const GLubyte *code, GLint t, GLchan *rgba)
+fxt1_decode_1CHROMA (const GLubyte *code, GLint t, GLubyte *rgba)
{
const GLuint *cc;
GLuint kk;
t *= 15;
cc = (const GLuint *)(code + 8 + t / 8);
kk = cc[0] >> (t & 7);
- rgba[BCOMP] = UBYTE_TO_CHAN( UP5(kk) );
- rgba[GCOMP] = UBYTE_TO_CHAN( UP5(kk >> 5) );
- rgba[RCOMP] = UBYTE_TO_CHAN( UP5(kk >> 10) );
- rgba[ACOMP] = CHAN_MAX;
+ rgba[BCOMP] = UP5(kk);
+ rgba[GCOMP] = UP5(kk >> 5);
+ rgba[RCOMP] = UP5(kk >> 10);
+ rgba[ACOMP] = 255;
}
static void
-fxt1_decode_1MIXED (const GLubyte *code, GLint t, GLchan *rgba)
+fxt1_decode_1MIXED (const GLubyte *code, GLint t, GLubyte *rgba)
{
const GLuint *cc;
GLuint col[2][3];
g = (UP5(col[0][GCOMP]) + UP6(col[1][GCOMP], glsb)) / 2;
r = (UP5(col[0][RCOMP]) + UP5(col[1][RCOMP])) / 2;
}
- rgba[RCOMP] = UBYTE_TO_CHAN(r);
- rgba[GCOMP] = UBYTE_TO_CHAN(g);
- rgba[BCOMP] = UBYTE_TO_CHAN(b);
- rgba[ACOMP] = CHAN_MAX;
+ rgba[RCOMP] = r;
+ rgba[GCOMP] = g;
+ rgba[BCOMP] = b;
+ rgba[ACOMP] = 255;
}
} else {
/* alpha[0] == 0 */
UP6(col[1][GCOMP], glsb));
r = LERP(3, t, UP5(col[0][RCOMP]), UP5(col[1][RCOMP]));
}
- rgba[RCOMP] = UBYTE_TO_CHAN(r);
- rgba[GCOMP] = UBYTE_TO_CHAN(g);
- rgba[BCOMP] = UBYTE_TO_CHAN(b);
- rgba[ACOMP] = CHAN_MAX;
+ rgba[RCOMP] = r;
+ rgba[GCOMP] = g;
+ rgba[BCOMP] = b;
+ rgba[ACOMP] = 255;
}
}
static void
-fxt1_decode_1ALPHA (const GLubyte *code, GLint t, GLchan *rgba)
+fxt1_decode_1ALPHA (const GLubyte *code, GLint t, GLubyte *rgba)
{
const GLuint *cc;
GLubyte r, g, b, a;
r = UP5(kk >> 10);
}
}
- rgba[RCOMP] = UBYTE_TO_CHAN(r);
- rgba[GCOMP] = UBYTE_TO_CHAN(g);
- rgba[BCOMP] = UBYTE_TO_CHAN(b);
- rgba[ACOMP] = UBYTE_TO_CHAN(a);
+ rgba[RCOMP] = r;
+ rgba[GCOMP] = g;
+ rgba[BCOMP] = b;
+ rgba[ACOMP] = a;
}
-void
+static void
fxt1_decode_1 (const void *texture, GLint stride, /* in pixels */
- GLint i, GLint j, GLchan *rgba)
+ GLint i, GLint j, GLubyte *rgba)
{
- static void (*decode_1[]) (const GLubyte *, GLint, GLchan *) = {
+ static void (*decode_1[]) (const GLubyte *, GLint, GLubyte *) = {
fxt1_decode_1HI, /* cc-high = "00?" */
fxt1_decode_1HI, /* cc-high = "00?" */
fxt1_decode_1CHROMA, /* cc-chroma = "010" */
}
-#endif /* FEATURE_texture_fxt1 */
+
+
+static void
+fetch_rgb_fxt1(const GLubyte *map,
+ GLint rowStride, GLint i, GLint j, 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,
+ GLint rowStride, GLint i, GLint j, 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(mesa_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;
+ }
+}
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