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Fixed OpenGL ES Shaders for systems that don't understand precision keywords

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This commit is contained in:
Sam Lantinga 2022-08-05 16:17:10 -07:00
parent 3685c64ed1
commit 5858c7dfce
1 changed files with 17 additions and 11 deletions
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28
src/render/opengles2/SDL_shaders_gles2.c
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@ -27,6 +27,16 @@
#include "SDL_shaders_gles2.h"
#include "SDL_stdinc.h"
#define SHADER_PRELOGUE "\n\
#if GL_FRAGMENT_PRECISION_HIGH\n\
precision mediump float;\n\
#else\n\
#define mediump\n\
#define highp\n\
#define lowp\n\
#endif\n\
"
/*************************************************************************************************
* Vertex/fragment shader source *
*************************************************************************************************/
@ -47,8 +57,7 @@ static const Uint8 GLES2_Vertex_Default[] = " \
} \
";
static const Uint8 GLES2_Fragment_Solid[] = " \
precision mediump float; \
static const Uint8 GLES2_Fragment_Solid[] = SHADER_PRELOGUE" \
varying vec4 v_color; \
\
void main() \
@ -57,8 +66,7 @@ static const Uint8 GLES2_Fragment_Solid[] = " \
} \
";
static const Uint8 GLES2_Fragment_TextureABGR[] = " \
precision mediump float; \
static const Uint8 GLES2_Fragment_TextureABGR[] = SHADER_PRELOGUE" \
uniform sampler2D u_texture; \
varying vec4 v_color;\n\
#ifdef GL_FRAGMENT_PRECISION_HIGH\n\
@ -75,8 +83,7 @@ static const Uint8 GLES2_Fragment_TextureABGR[] = " \
";
/* ARGB to ABGR conversion */
static const Uint8 GLES2_Fragment_TextureARGB[] = " \
precision mediump float; \
static const Uint8 GLES2_Fragment_TextureARGB[] = SHADER_PRELOGUE" \
uniform sampler2D u_texture; \
varying vec4 v_color;\n\
#ifdef GL_FRAGMENT_PRECISION_HIGH\n\
@ -96,8 +103,7 @@ static const Uint8 GLES2_Fragment_TextureARGB[] = " \
";
/* RGB to ABGR conversion */
static const Uint8 GLES2_Fragment_TextureRGB[] = " \
precision mediump float; \
static const Uint8 GLES2_Fragment_TextureRGB[] = SHADER_PRELOGUE" \
uniform sampler2D u_texture; \
varying vec4 v_color;\n\
#ifdef GL_FRAGMENT_PRECISION_HIGH\n\
@ -118,8 +124,7 @@ static const Uint8 GLES2_Fragment_TextureRGB[] = " \
";
/* BGR to ABGR conversion */
static const Uint8 GLES2_Fragment_TextureBGR[] = " \
precision mediump float; \
static const Uint8 GLES2_Fragment_TextureBGR[] = SHADER_PRELOGUE" \
uniform sampler2D u_texture; \
varying vec4 v_color;\n\
#ifdef GL_FRAGMENT_PRECISION_HIGH\n\
@ -168,7 +173,7 @@ static const Uint8 GLES2_Fragment_TextureBGR[] = " \
#define YUV_SHADER_PROLOGUE \
"precision mediump float;\n" \
SHADER_PRELOGUE \
"uniform sampler2D u_texture;\n" \
"uniform sampler2D u_texture_u;\n" \
"uniform sampler2D u_texture_v;\n" \
@ -396,3 +401,4 @@ const Uint8 *GLES2_GetShader(GLES2_ShaderType type)
#endif /* SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED */
/* vi: set ts=4 sw=4 expandtab: */