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Diffstat (limited to 'src/mesa/main/texcompress_s3tc.c')
-rw-r--r--src/mesa/main/texcompress_s3tc.c137
1 files changed, 116 insertions, 21 deletions
diff --git a/src/mesa/main/texcompress_s3tc.c b/src/mesa/main/texcompress_s3tc.c
index 572cdd2561..a797c2edf9 100644
--- a/src/mesa/main/texcompress_s3tc.c
+++ b/src/mesa/main/texcompress_s3tc.c
@@ -28,6 +28,9 @@
* GL_EXT_texture_compression_s3tc support.
*/
+#ifndef USE_EXTERNAL_DXTN_LIB
+#define USE_EXTERNAL_DXTN_LIB 0
+#endif
#include "glheader.h"
#include "imports.h"
@@ -39,16 +42,79 @@
#include "texformat.h"
#include "texstore.h"
+#if USE_EXTERNAL_DXTN_LIB
+#include <dlfcn.h>
+#endif
+
+typedef void (*dxtFetchTexelFuncExt)( GLint srcRowstride, GLubyte *pixdata, GLint col, GLint row, GLvoid *texelOut );
+dxtFetchTexelFuncExt fetch_ext_rgb_dxt1;
+dxtFetchTexelFuncExt fetch_ext_rgba_dxt1;
+dxtFetchTexelFuncExt fetch_ext_rgba_dxt3;
+dxtFetchTexelFuncExt fetch_ext_rgba_dxt5;
+
+typedef void (*dxtCompressTexFuncExt)(GLint srccomps, GLint width, GLint height, const GLubyte *srcPixData, GLenum destformat, GLubyte *dest);
+dxtCompressTexFuncExt ext_tx_compress_dxtn;
+void *dxtlibhandle = NULL;
void
_mesa_init_texture_s3tc( GLcontext *ctx )
{
/* called during context initialization */
+ ctx->Mesa_DXTn = GL_FALSE;
+#if USE_EXTERNAL_DXTN_LIB
+ if (!dxtlibhandle) {
+ char *error;
+
+ dxtlibhandle = dlopen ("libtxc_dxtn.so", RTLD_LAZY | RTLD_GLOBAL);
+ if (!dxtlibhandle) {
+ _mesa_warning(ctx, "couldn't open libtxc_dxtn.so, software DXTn"
+ "compression/decompression unavailable\n");
+ }
+ else {
+ /* the fetch functions are not per context! Might be problematic... */
+ fetch_ext_rgb_dxt1 = dlsym(dxtlibhandle, "fetch_2d_texel_rgb_dxt1");
+ error = dlerror();
+ if (error == NULL) {
+ fetch_ext_rgba_dxt1 = dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt1");
+ error = dlerror();
+ }
+ if (error == NULL) {
+ fetch_ext_rgba_dxt3 = dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt3");
+ error = dlerror();
+ }
+ if (error == NULL) {
+ fetch_ext_rgba_dxt5 = dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt5");
+ error = dlerror();
+ }
+ if (error == NULL) {
+ ext_tx_compress_dxtn = dlsym(dxtlibhandle, "tx_compress_dxtn");
+ error = dlerror();
+ }
+
+ if (error) {
+ _mesa_warning(ctx, "couldn't reference all symbols in "
+ "libtxc_dxtn.so, software DXTn compression/decompression "
+ "unavailable\n");
+ fetch_ext_rgb_dxt1 = NULL;
+ fetch_ext_rgba_dxt1 = NULL;
+ fetch_ext_rgba_dxt3 = NULL;
+ fetch_ext_rgba_dxt5 = NULL;
+ ext_tx_compress_dxtn = NULL;
+ dlclose(dxtlibhandle);
+ dxtlibhandle = NULL;
+ }
+ }
+ }
+ if (dxtlibhandle) {
+ ctx->Mesa_DXTn = GL_TRUE;
+ _mesa_warning(ctx, "software DXTn compression/decompression available\n");
+ }
+#else
(void) ctx;
+#endif
}
-
/**
* Called via TexFormat->StoreImage to store an RGB_DXT1 texture.
*/
@@ -95,10 +161,12 @@ texstore_rgb_dxt1(STORE_PARAMS)
GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
texWidth, (GLubyte *) dstAddr);
-#if 0
- compress_dxt1(ctx, srcWidth, srcHeight, srcFormat, pixels, srcRowStride,
- dst, dstRowStride);
-#endif
+ if (ext_tx_compress_dxtn) {
+ (*ext_tx_compress_dxtn)(3, srcWidth, srcHeight, pixels, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, dst);
+ }
+ else {
+ _mesa_problem(ctx, "external dxt library not available");
+ }
if (tempImage)
_mesa_free((void *) tempImage);
@@ -152,10 +220,13 @@ texstore_rgba_dxt1(STORE_PARAMS)
dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,
texWidth, (GLubyte *) dstAddr);
-#if 0
- compress_dxt1(ctx, srcWidth, srcHeight, srcFormat, pixels, srcRowStride,
- dst, dstRowStride);
-#endif
+ if (ext_tx_compress_dxtn) {
+ (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, dst);
+ }
+ else {
+ _mesa_problem(ctx, "external dxt library not available");
+ }
+
if (tempImage)
_mesa_free((void*) tempImage);
@@ -207,10 +278,13 @@ texstore_rgba_dxt3(STORE_PARAMS)
dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
texWidth, (GLubyte *) dstAddr);
-#if 0
- compress_rgba_dxt3(ctx, srcWidth, srcHeight, pixels,
- srcRowStride, dst, dstRowStride);
-#endif
+ if (ext_tx_compress_dxtn) {
+ (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, dst);
+ }
+ else {
+ _mesa_problem(ctx, "external dxt library not available");
+ }
+
if (tempImage)
_mesa_free((void *) tempImage);
@@ -262,10 +336,13 @@ texstore_rgba_dxt5(STORE_PARAMS)
dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,
texWidth, (GLubyte *) dstAddr);
-#if 0
- compress_rgba_dxt5(ctx, srcWidth, srcHeight, pixels,
- srcRowStride, dst, dstRowStride);
-#endif
+ if (ext_tx_compress_dxtn) {
+ (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, dst);
+ }
+ else {
+ _mesa_problem(ctx, "external dxt library not available");
+ }
+
if (tempImage)
_mesa_free((void *) tempImage);
@@ -277,7 +354,12 @@ static void
fetch_texel_2d_rgb_dxt1( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
- (void) texImage; (void) i; (void) j; (void) k; (void) texel;
+ (void) k;
+ if (fetch_ext_rgb_dxt1) {
+ ASSERT (sizeof(GLchan) == sizeof(GLubyte));
+ (*fetch_ext_rgb_dxt1)((texImage)->RowStride, (GLubyte *)(texImage)->Data, i, j, texel);
+ }
+ else _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n");
}
@@ -299,7 +381,11 @@ static void
fetch_texel_2d_rgba_dxt1( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
- (void) texImage; (void) i; (void) j; (void) k; (void) texel;
+ (void) k;
+ if (fetch_ext_rgba_dxt1) {
+ (*fetch_ext_rgba_dxt1)((texImage)->RowStride, (GLubyte *)(texImage)->Data, i, j, texel);
+ }
+ else _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n");
}
@@ -321,7 +407,12 @@ static void
fetch_texel_2d_rgba_dxt3( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
- (void) texImage; (void) i; (void) j; (void) k; (void) texel;
+ (void) k;
+ if (fetch_ext_rgba_dxt3) {
+ ASSERT (sizeof(GLchan) == sizeof(GLubyte));
+ (*fetch_ext_rgba_dxt3)((texImage)->RowStride, (GLubyte *)(texImage)->Data, i, j, texel);
+ }
+ else _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n");
}
@@ -343,7 +434,11 @@ static void
fetch_texel_2d_rgba_dxt5( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
- (void) texImage; (void) i; (void) j; (void) k; (void) texel;
+ (void) k;
+ if (fetch_ext_rgba_dxt5) {
+ (*fetch_ext_rgba_dxt5)((texImage)->RowStride, (GLubyte *)(texImage)->Data, i, j, texel);
+ }
+ else _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n");
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-13 02:53:17 +0000