diff options
Diffstat (limited to 'src/osd/modules/opengl/shader/glsl_plain_rgb32_dir.fsh')
-rw-r--r-- | src/osd/modules/opengl/shader/glsl_plain_rgb32_dir.fsh | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/osd/modules/opengl/shader/glsl_plain_rgb32_dir.fsh b/src/osd/modules/opengl/shader/glsl_plain_rgb32_dir.fsh new file mode 100644 index 00000000000..0e5a4605ac8 --- /dev/null +++ b/src/osd/modules/opengl/shader/glsl_plain_rgb32_dir.fsh @@ -0,0 +1,24 @@ + +#pragma optimize (on) +#pragma debug (off) + +uniform sampler2D color_texture; +uniform vec4 vid_attributes; // gamma, contrast, brightness + +// #define DO_GAMMA 1 // 'pow' is very slow on old hardware, i.e. pre R600 and 'slow' in general + +void main() +{ +#ifdef DO_GAMMA + vec4 gamma = vec4( 1.0 / vid_attributes.r, 1.0 / vid_attributes.r, 1.0 / vid_attributes.r, 0.0); + + // gamma, contrast, brightness equation from: rendutil.h / apply_brightness_contrast_gamma_fp + vec4 color = pow( texture2D(color_texture, gl_TexCoord[0].st) , gamma); +#else + vec4 color = texture2D(color_texture, gl_TexCoord[0].st); +#endif + + // contrast/brightness + gl_FragColor = (color * vid_attributes.g) + vid_attributes.b - 1.0; +} + |