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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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8
client/renderers/EGL/shader/downscale_lanczos2.frag
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@@ -1,4 +1,6 @@
#version 300 es
#extension GL_OES_EGL_image_external_essl3 : enable
precision highp float;
#define PI 3.141592653589793
@@ -6,7 +8,7 @@ precision highp float;
in vec2 fragCoord;
out vec4 fragColor;
uniform sampler2D texture;
uniform sampler2D sampler1;
float sinc(float x)
{
return x == 0.0 ? 1.0 : sin(x * PI) / (x * PI);
@@ -24,7 +26,7 @@ float lanczos(vec2 v)
void main()
{
vec2 size = vec2(textureSize(texture, 0));
vec2 size = vec2(textureSize(sampler1, 0));
vec2 pos = fragCoord * size;
vec2 invSize = 1.0 / size;
vec2 uvc = floor(pos) + vec2(0.5, 0.5);
@@ -54,7 +56,7 @@ void main()
vec3 color = vec3(0.0);
for (int i = 0; i < 9; ++i)
color += texture2D(texture, uvs[i] * invSize).rgb * factors[i];
color += texture(sampler1, uvs[i] * invSize).rgb * factors[i];
fragColor = vec4(color, 1.0);
}