diff options
| author |  wm4 <wm4@mplayer2.org> | 2011-11-08 20:21:00 +0100 |
|---|---|---|
| committer |  Uoti Urpala <uau@mplayer2.org> | 2011-11-25 23:59:49 +0200 |
| commit | 046692d90b3282ae99c9470aec711158eb2f1c40 (patch) | |
| tree | ac84c653d187d008237880947e0a791d3a2ed268 /libvo/gl_common.h | |
| parent | b65ee1f5ac0b8634b6b79c81deeea86ef39c4069 (diff) | |
vo_gl: fix 10 bit with Mesa drivers (Intel/Nouveau on Linux)
The GL_LUMINANCE16 texture format had only 8 bit precision on Mesa
based drivers. This caused heavy degradation of the image when playing
formats with more than 8 bits per pixel, such as 10 bit h264. Use
GL_R16 instead, which at least Mesa and Nvidia drivers actually
implement as 16 bit textures. Since sampling from this texture format
doesn't return anything meaningful in the other color components
(unlike luminance textures), the shader code has to be slightly
changed.
GL_R16 requires the GL_ARB_texture_rg extension. Check for it, and fall
back to the old texture format if it's not available.
The low precision of the GL_LUMINANCE16 format has just been fixed in
upstream Mesa, but it'll take a while before that fix is available in
distros.
Diffstat (limited to 'libvo/gl_common.h')
| -rw-r--r-- | libvo/gl_common.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libvo/gl_common.h b/libvo/gl_common.h index d1d034b99a..f2e07e7e8b 100644 --- a/libvo/gl_common.h +++ b/libvo/gl_common.h @@ -218,6 +218,9 @@ #ifndef GL_LUMINANCE16 #define GL_LUMINANCE16 0x8042 #endif +#ifndef GL_R16 +#define GL_R16 0x822A +#endif #ifndef GL_UNPACK_CLIENT_STORAGE_APPLE #define GL_UNPACK_CLIENT_STORAGE_APPLE 0x85B2 #endif @@ -245,8 +248,8 @@ void glAdjustAlignment(GL *gl, int stride); const char *glValName(GLint value); -int glFindFormat(uint32_t format, int *bpp, GLint *gl_texfmt, - GLenum *gl_format, GLenum *gl_type); +int glFindFormat(uint32_t format, int have_texture_rg, int *bpp, + GLint *gl_texfmt, GLenum *gl_format, GLenum *gl_type); int glFmt2bpp(GLenum format, GLenum type); void glCreateClearTex(GL *gl, GLenum target, GLenum fmt, GLenum format, GLenum type, GLint filter, int w, int h, |