From 8167ef2c4a438085380d4eb3973a10b3c496a6f1 Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Fri, 12 Nov 2021 07:41:59 +1100
Subject: [PATCH] [client] egl: make use of glsl's textureSize function

---
 client/renderers/EGL/desktop.c               | 7 -------
 client/renderers/EGL/shader/desktop_rgb.frag | 4 ++--
 2 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/client/renderers/EGL/desktop.c b/client/renderers/EGL/desktop.c
index 3192d569..8ffc7bf1 100644
--- a/client/renderers/EGL/desktop.c
+++ b/client/renderers/EGL/desktop.c
@@ -46,7 +46,6 @@ struct DesktopShader
   EGL_Shader * shader;
   GLint uTransform;
   GLint uDesktopSize;
-  GLint uTextureSize;
   GLint uScaleAlgo;
   GLint uNVGain;
   GLint uCBMode;
@@ -105,7 +104,6 @@ static bool egl_initDesktopShader(
 
   shader->uTransform   = egl_shaderGetUniform(shader->shader, "transform"  );
   shader->uDesktopSize = egl_shaderGetUniform(shader->shader, "desktopSize");
-  shader->uTextureSize = egl_shaderGetUniform(shader->shader, "textureSize");
   shader->uScaleAlgo   = egl_shaderGetUniform(shader->shader, "scaleAlgo"  );
   shader->uNVGain      = egl_shaderGetUniform(shader->shader, "nvGain"     );
   shader->uCBMode      = egl_shaderGetUniform(shader->shader, "cbMode"     );
@@ -428,11 +426,6 @@ bool egl_desktopRender(EGL_Desktop * desktop, unsigned int outputWidth,
       .location    = shader->uDesktopSize,
       .f           = { desktop->width, desktop->height },
     },
-    {
-      .type        = EGL_UNIFORM_TYPE_2I,
-      .location    = shader->uTextureSize,
-      .i           = { finalSizeX, finalSizeY },
-    },
     {
       .type        = EGL_UNIFORM_TYPE_M3x2FV,
       .location    = shader->uTransform,
diff --git a/client/renderers/EGL/shader/desktop_rgb.frag b/client/renderers/EGL/shader/desktop_rgb.frag
index 3ee2efee..3dcd8f65 100644
--- a/client/renderers/EGL/shader/desktop_rgb.frag
+++ b/client/renderers/EGL/shader/desktop_rgb.frag
@@ -14,7 +14,6 @@ out vec4 color;
 uniform sampler2D sampler1;
 
 uniform int   scaleAlgo;
-uniform ivec2 textureSize;
 
 uniform float nvGain;
 uniform int   cbMode;
@@ -24,7 +23,8 @@ void main()
   switch (scaleAlgo)
   {
     case EGL_SCALE_NEAREST:
-      color = texelFetch(sampler1, ivec2(uv * vec2(textureSize)), 0);
+      vec2 ts = vec2(textureSize(sampler1, 0));
+      color   = texelFetch(sampler1, ivec2(uv * ts), 0);
       break;
 
     case EGL_SCALE_LINEAR: