diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/main/texcompress.c | 86 | ||||
| -rw-r--r-- | src/mesa/main/texcompress.h | 5 |
2 files changed, 91 insertions, 0 deletions
diff --git a/src/mesa/main/texcompress.c b/src/mesa/main/texcompress.c index 390fc535e92..4e5c14cbba2 100644 --- a/src/mesa/main/texcompress.c +++ b/src/mesa/main/texcompress.c @@ -37,6 +37,9 @@ #include "mfeatures.h" #include "mtypes.h" #include "texcompress.h" +#include "texcompress_fxt1.h" +#include "texcompress_rgtc.h" +#include "texcompress_s3tc.h" /** @@ -438,3 +441,86 @@ _mesa_compressed_image_address(GLint col, GLint row, GLint img, return (GLubyte *) image + offset; } + + +/** + * Decompress a compressed texture image, returning a GL_RGBA/GL_FLOAT image. + */ +void +_mesa_decompress_image(gl_format format, GLuint width, GLuint height, + const GLubyte *src, GLint srcRowStride, + GLfloat *dest) +{ + void (*fetch)(const struct gl_texture_image *texImage, + GLint i, GLint j, GLint k, GLfloat *texel); + struct gl_texture_image texImage; /* dummy teximage */ + GLuint i, j; + + /* setup dummy texture image info */ + memset(&texImage, 0, sizeof(texImage)); + texImage.Data = (void *) src; + texImage.RowStride = srcRowStride; + + switch (format) { + /* DXT formats */ + case MESA_FORMAT_RGB_DXT1: + fetch = _mesa_fetch_texel_2d_f_rgb_dxt1; + break; + case MESA_FORMAT_RGBA_DXT1: + fetch = _mesa_fetch_texel_2d_f_rgba_dxt1; + break; + case MESA_FORMAT_RGBA_DXT3: + fetch = _mesa_fetch_texel_2d_f_rgba_dxt3; + break; + case MESA_FORMAT_RGBA_DXT5: + fetch = _mesa_fetch_texel_2d_f_rgba_dxt5; + break; + + /* FXT1 formats */ + case MESA_FORMAT_RGB_FXT1: + fetch = _mesa_fetch_texel_2d_f_rgb_fxt1; + break; + case MESA_FORMAT_RGBA_FXT1: + fetch = _mesa_fetch_texel_2d_f_rgba_fxt1; + break; + + /* Red/RG formats */ + case MESA_FORMAT_RED_RGTC1: + fetch = _mesa_fetch_texel_2d_f_red_rgtc1; + break; + case MESA_FORMAT_SIGNED_RED_RGTC1: + fetch = _mesa_fetch_texel_2d_f_signed_red_rgtc1; + break; + case MESA_FORMAT_RG_RGTC2: + fetch = _mesa_fetch_texel_2d_f_rg_rgtc2; + break; + case MESA_FORMAT_SIGNED_RG_RGTC2: + fetch = _mesa_fetch_texel_2d_f_signed_rg_rgtc2; + break; + + /* L/LA formats */ + case MESA_FORMAT_L_LATC1: + fetch = _mesa_fetch_texel_2d_f_l_latc1; + break; + case MESA_FORMAT_SIGNED_L_LATC1: + fetch = _mesa_fetch_texel_2d_f_signed_l_latc1; + break; + case MESA_FORMAT_LA_LATC2: + fetch = _mesa_fetch_texel_2d_f_la_latc2; + break; + case MESA_FORMAT_SIGNED_LA_LATC2: + fetch = _mesa_fetch_texel_2d_f_signed_la_latc2; + break; + + default: + _mesa_problem(NULL, "Unexpected format in _mesa_decompress_image()"); + return; + } + + for (j = 0; j < height; j++) { + for (i = 0; i < width; i++) { + fetch(&texImage, i, j, 0, dest); + dest += 4; + } + } +} diff --git a/src/mesa/main/texcompress.h b/src/mesa/main/texcompress.h index 375cf90c8a2..2c357068c91 100644 --- a/src/mesa/main/texcompress.h +++ b/src/mesa/main/texcompress.h @@ -50,6 +50,11 @@ _mesa_compressed_image_address(GLint col, GLint row, GLint img, gl_format mesaFormat, GLsizei width, const GLubyte *image); +extern void +_mesa_decompress_image(gl_format format, GLuint width, GLuint height, + const GLubyte *src, GLint srcRowStride, + GLfloat *dest); + #else /* _HAVE_FULL_GL */ /* no-op macros */ |