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[client] egl: switch to using GL_TEXTURE_EXTERNAL_OES for DMABUF

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According to Erik @ NVidia the open source NVidia driver will not
create a EGLImage from a DMABUF if the target is not
GL_TEXTURE_EXTERNAL_OES. This change set converts the dmabuf texture
from GL_TEXTURE_2D to GL_TEXTURE_EXTERNAL_OES and at runtime performs a
global search & replace on fragment shaders as needed to remain
compatible, replacing `sampler2D` with `samplerExternalOES`.

Ref: https://github.com/NVIDIA/open-gpu-kernel-modules/discussions/243#discussioncomment-3283415
This commit is contained in:
Geoffrey McRae
2023-03-09 09:20:01 +11:00
parent bbc9204bfe
commit b4b4a37b2b
27 changed files with 372 additions and 180 deletions
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15
client/renderers/EGL/shader/compat.h
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@@ -1,16 +1,21 @@
#if __VERSION__ == 300
vec4 textureGather(sampler2D tex, vec2 uv, int comp)
{
vec4 c0 = textureOffset(tex, uv, ivec2(0,1));
vec4 c1 = textureOffset(tex, uv, ivec2(1,1));
vec4 c2 = textureOffset(tex, uv, ivec2(1,0));
vec4 c3 = textureOffset(tex, uv, ivec2(0,0));
vec2 res = vec2(textureSize(tex, 0));
ivec2 p = ivec2((uv * res) - 0.5f);
// NOTE: we can't use texelFecthOffset because sampler2D may actually be samplerExternalOES
vec4 c0 = texelFetch(tex, p+ivec2(0,1), 0);
vec4 c1 = texelFetch(tex, p+ivec2(1,1), 0);
vec4 c2 = texelFetch(tex, p+ivec2(1,0), 0);
vec4 c3 = texelFetch(tex, p+ivec2(0,0), 0);
return vec4(c0[comp], c1[comp], c2[comp],c3[comp]);
}
#elif __VERSION__ < 300
vec4 textureGather(sampler2D tex, vec2 uv, int comp)
{
vec4 c3 = texture2D(tex, uv);
vec4 c3 = texture(tex, uv);
return vec4(c3[comp], c3[comp], c3[comp],c3[comp]);
}
#endif