17103d765f
Support dmabuf textures in the GL renderer. This copies the approach taken by mutter for yuv dmabuf conversion.
50 lines
938 B
GLSL
50 lines
938 B
GLSL
// VERTEX_SHADER:
|
|
// nv12.glsl
|
|
|
|
void main() {
|
|
gl_Position = u_projection * u_modelview * vec4(aPosition, 0.0, 1.0);
|
|
|
|
vUv = vec2(aUv.x, aUv.y);
|
|
}
|
|
|
|
// FRAGMENT_SHADER:
|
|
// nv12.glsl
|
|
|
|
uniform sampler2D u_source2;
|
|
|
|
vec4 yuv_to_rgb(vec4 yuv)
|
|
{
|
|
vec4 res;
|
|
|
|
float Y = 1.16438356 * (yuv.x - 0.0625);
|
|
float su = yuv.y - 0.5;
|
|
float sv = yuv.z - 0.5;
|
|
|
|
res.r = Y + 1.59602678 * sv;
|
|
res.g = Y - 0.39176229 * su - 0.81296764 * sv;
|
|
res.b = Y + 2.01723214 * su;
|
|
|
|
res.rgb *= yuv.w;
|
|
res.a = yuv.w;
|
|
|
|
return res;
|
|
}
|
|
|
|
/* This shader converts 2-plane yuv (DRM_FORMAT_NV12 or DRM_FORMAT_P010)
|
|
* into rgb. It assumes that the two planes have been imported separately,
|
|
* the first one as R texture, the second one as RG.
|
|
*/
|
|
|
|
void main() {
|
|
vec4 y = GskTexture(u_source, vUv);
|
|
vec4 uv = GskTexture(u_source2, vUv);
|
|
|
|
vec4 yuv;
|
|
|
|
yuv.x = y.x;
|
|
yuv.yz = uv.xy;
|
|
yuv.w = 1.0;
|
|
|
|
gskSetOutputColor(yuv_to_rgb(yuv));
|
|
}
|