Commit 65647b341777e469efc9a3e05755eb89daed4ecc
2022-07-22T22:07:52
SDL_Render: use high precision texcoords in ES2 shaders, when possible Fixes #5884
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diff --git a/src/render/opengles2/SDL_shaders_gles2.c b/src/render/opengles2/SDL_shaders_gles2.c
index a1f78fd..f9a8ce3 100644
--- a/src/render/opengles2/SDL_shaders_gles2.c
+++ b/src/render/opengles2/SDL_shaders_gles2.c
@@ -60,8 +60,12 @@ static const Uint8 GLES2_Fragment_Solid[] = " \
static const Uint8 GLES2_Fragment_TextureABGR[] = " \
precision mediump float; \
uniform sampler2D u_texture; \
- varying vec4 v_color; \
- varying vec2 v_texCoord; \
+ varying vec4 v_color;\n\
+ #ifdef GL_FRAGMENT_PRECISION_HIGH\n\
+ varying highp vec2 v_texCoord;\n\
+ #else\n\
+ varying vec2 v_texCoord;\n\
+ #endif\n\
\
void main() \
{ \
@@ -74,8 +78,12 @@ static const Uint8 GLES2_Fragment_TextureABGR[] = " \
static const Uint8 GLES2_Fragment_TextureARGB[] = " \
precision mediump float; \
uniform sampler2D u_texture; \
- varying vec4 v_color; \
- varying vec2 v_texCoord; \
+ varying vec4 v_color;\n\
+ #ifdef GL_FRAGMENT_PRECISION_HIGH\n\
+ varying highp vec2 v_texCoord;\n\
+ #else\n\
+ varying vec2 v_texCoord;\n\
+ #endif\n\
\
void main() \
{ \
@@ -91,8 +99,12 @@ static const Uint8 GLES2_Fragment_TextureARGB[] = " \
static const Uint8 GLES2_Fragment_TextureRGB[] = " \
precision mediump float; \
uniform sampler2D u_texture; \
- varying vec4 v_color; \
- varying vec2 v_texCoord; \
+ varying vec4 v_color;\n\
+ #ifdef GL_FRAGMENT_PRECISION_HIGH\n\
+ varying highp vec2 v_texCoord;\n\
+ #else\n\
+ varying vec2 v_texCoord;\n\
+ #endif\n\
\
void main() \
{ \
@@ -109,8 +121,12 @@ static const Uint8 GLES2_Fragment_TextureRGB[] = " \
static const Uint8 GLES2_Fragment_TextureBGR[] = " \
precision mediump float; \
uniform sampler2D u_texture; \
- varying vec4 v_color; \
- varying vec2 v_texCoord; \
+ varying vec4 v_color;\n\
+ #ifdef GL_FRAGMENT_PRECISION_HIGH\n\
+ varying highp vec2 v_texCoord;\n\
+ #else\n\
+ varying vec2 v_texCoord;\n\
+ #endif\n\
\
void main() \
{ \
@@ -157,7 +173,11 @@ static const Uint8 GLES2_Fragment_TextureBGR[] = " \
"uniform sampler2D u_texture_u;\n" \
"uniform sampler2D u_texture_v;\n" \
"varying vec4 v_color;\n" \
+"#ifdef GL_FRAGMENT_PRECISION_HIGH\n" \
+"varying highp vec2 v_texCoord;\n" \
+"#else\n" \
"varying vec2 v_texCoord;\n" \
+"#endif\n" \
"\n" \
#define YUV_SHADER_BODY \
@@ -308,8 +328,12 @@ static const Uint8 GLES2_Fragment_TextureExternalOES[] = " \
#extension GL_OES_EGL_image_external : require\n\
precision mediump float; \
uniform samplerExternalOES u_texture; \
- varying vec4 v_color; \
- varying vec2 v_texCoord; \
+ varying vec4 v_color;\n\
+ #ifdef GL_FRAGMENT_PRECISION_HIGH\n\
+ varying highp vec2 v_texCoord;\n\
+ #else\n\
+ varying vec2 v_texCoord;\n\
+ #endif\n\
\
void main() \
{ \