gl2shim: make shaders code more portable

ref/gl/gl2_shim/fragment.glsl.inc

@@ -1,69 +1,65 @@
-R"(
+"#if VER <= 300\n"
-
+"#define layout(x)\n"
-
+"#endif\n"
-#if VER <= 300
+"#if VER < 300\n"
-#define layout(x)
+"#define out attribute\n"
-#endif
+"#define in varying\n"
-#if VER < 300
+"#define texture texture2D\n"
-#define out attribute
+"#endif\n"
-#define in varying
+"#if VER >= 130\n"
-#define texture texture2D
+"precision mediump float;\n"
-#endif
+"#endif\n"
-#if VER >= 130
+"#if ATTR_TEXCOORD0\n"
-precision mediump float;
+"uniform sampler2D uTex0;\n"
-#endif
+"#endif\n"
-#if ATTR_TEXCOORD0
+"#if ATTR_TEXCOORD1\n"
-uniform sampler2D uTex0;
+"uniform sampler2D uTex1;\n"
-#endif
+"#endif\n"
-#if ATTR_TEXCOORD1
+"#if FEAT_ALPHA_TEST\n"
-uniform sampler2D uTex1;
+"uniform float uAlphaTest;\n"
-#endif
+"#endif\n"
-#if FEAT_ALPHA_TEST
+"#if FEAT_FOG\n"
-uniform float uAlphaTest;
+"uniform vec4 uFog;\n"
-#endif
+"#endif\n"
-#if FEAT_FOG
+"uniform vec4 uColor;\n"
-uniform vec4 uFog;
+"#if ATTR_COLOR\n"
-#endif
+"in vec4 vColor;\n"
-uniform vec4 uColor;
+"#endif\n"
-#if ATTR_COLOR
+"#if ATTR_TEXCOORD0\n"
-in vec4 vColor;
+"in vec2 vTexCoord0;\n"
-#endif
+"#endif\n"
-#if ATTR_TEXCOORD0
+"#if ATTR_TEXCOORD1\n"
-in vec2 vTexCoord0;
+"in vec2 vTexCoord1;\n"
-#endif
+"#endif\n"
-#if ATTR_TEXCOORD1
+"#if ATTR_NORMAL\n"
-in vec2 vTexCoord1;
+"in vec2 vNormal;\n"
-#endif
+"#endif\n"
-#if ATTR_NORMAL
+"#if VER >= 300\n"
-in vec2 vNormal;
+"out vec4 oFragColor;\n"
-#endif
+"#else\n"
-#if VER >= 300
+"#define oFragColor gl_FragColor\n"
-out vec4 oFragColor;
+"#endif\n"
-#else
+"void main()\n"
-#define oFragColor gl_FragColor
+"{\n"
-#endif
+"#if ATTR_COLOR\n"
-void main()
+"vec4 c = vColor;\n"
-{
+"#else\n"
-#if ATTR_COLOR
+"vec4 c = uColor;\n"
-   vec4 c = vColor;
+"#endif\n"
-#else
+"#if ATTR_TEXCOORD0\n"
-   vec4 c = uColor;
+"c = c * texture(uTex0, vTexCoord0);\n"
-#endif
+"#endif\n"
-#if ATTR_TEXCOORD0
+"#if ATTR_TEXCOORD1\n"
-    c = c * texture(uTex0, vTexCoord0);
+"c = c * texture(uTex1, vTexCoord1);\n"
-#endif
+"#endif\n"
-#if ATTR_TEXCOORD1
+"#if FEAT_ALPHA_TEST\n"
-    c = c * texture(uTex1, vTexCoord1);
+"if(c.a <= uAlphaTest)\n"
-#endif
+"discard;\n"
-#if FEAT_ALPHA_TEST
+"#endif\n"
-    if(c.a <= uAlphaTest)
+"#if FEAT_FOG\n"
-        discard;
+"float fogDist = gl_FragCoord.z / gl_FragCoord.w;\n"
-#endif
+"float fogRate = clamp(exp(-uFog.w * fogDist), 0.f, 1.f);\n"
-#if FEAT_FOG
+"c.rgb = mix(uFog.rgb, c.rgb, fogRate);\n"
-    float fogDist = gl_FragCoord.z / gl_FragCoord.w;
+"#endif\n"
-    float fogRate = clamp(exp(-uFog.w * fogDist), 0.f, 1.f);
+"oFragColor = c;\n"
-    c.rgb = mix(uFog.rgb, c.rgb, fogRate);
+"}\n"
-#endif
-    oFragColor = c;
-}
-)"

ref/gl/gl2_shim/vertex.glsl.inc

@@ -1,56 +1,53 @@
-R"(
+"#if VER <= 300\n"
-
+"#define layout(x)\n"
-#if VER <= 300
+"#endif\n"
-#define layout(x)
+"#if VER < 300\n"
-#endif
+"#define in attribute\n"
-#if VER < 300
+"#define out varying\n"
-#define in attribute
+"#endif\n"
-#define out varying
+"\n"
-#endif
+"layout(location = LOC_ATTR_POSITION) in vec3 inPosition;\n"
-
+"#if ATTR_COLOR\n"
-layout(location = LOC_ATTR_POSITION) in vec3 inPosition;
+"layout(location = LOC_ATTR_COLOR) in vec4 inColor;\n"
-#if ATTR_COLOR
+"#endif\n"
-layout(location = LOC_ATTR_COLOR) in vec4 inColor;
+"#if ATTR_TEXCOORD0\n"
-#endif
+"layout(location = LOC_ATTR_TEXCOORD0) in vec2 inTexCoord0;\n"
-#if ATTR_TEXCOORD0
+"#endif\n"
-layout(location = LOC_ATTR_TEXCOORD0) in vec2 inTexCoord0;
+"#if ATTR_TEXCOORD1\n"
-#endif
+"layout(location = LOC_ATTR_TEXCOORD1) in vec2 inTexCoord1;\n"
-#if ATTR_TEXCOORD1
+"#endif\n"
-layout(location = LOC_ATTR_TEXCOORD1) in vec2 inTexCoord1;
+"\n"
-#endif
+"#if ATTR_NORMAL\n"
-
+"in vec3 inNormal;\n"
-#if ATTR_NORMAL
+"#endif\n"
-in vec3 inNormal;
+"#if ATTR_COLOR\n"
-#endif
+"out vec4 vColor;\n"
-#if ATTR_COLOR
+"#endif\n"
-out vec4 vColor;
+"#if ATTR_TEXCOORD0\n"
-#endif
+"out vec2 vTexCoord0;\n"
-#if ATTR_TEXCOORD0
+"#endif\n"
-out vec2 vTexCoord0;
+"#if ATTR_TEXCOORD1\n"
-#endif
+"out vec2 vTexCoord1;\n"
-#if ATTR_TEXCOORD1
+"#endif\n"
-out vec2 vTexCoord1;
+"#if ATTR_NORMAL\n"
-#endif
+"out vec3 vNormal;\n"
-#if ATTR_NORMAL
+"#endif\n"
-out vec3 vNormal;
+"\n"
-#endif
+"uniform mat4 uMVP;\n"
-
+"\n"
-uniform mat4 uMVP;
+"void main()\n"
-
+"{\n"
-void main()
+"gl_Position = uMVP * vec4(inPosition,1.0f);\n"
-{
+"#if ATTR_COLOR\n"
-	gl_Position = uMVP * vec4(inPosition,1.0f);
+"vColor = inColor;\n"
-#if ATTR_COLOR
+"#endif\n"
-    vColor = inColor;
+"#if ATTR_NORMAL\n"
-#endif
+"vNormal = inNormal;\n"
-#if ATTR_NORMAL
+"#endif\n"
-    vNormal = inNormal;
+"#if ATTR_TEXCOORD0\n"
-#endif
+"vTexCoord0 = inTexCoord0;\n"
-#if ATTR_TEXCOORD0
+"#endif\n"
-    vTexCoord0 = inTexCoord0;
+"#if ATTR_TEXCOORD1\n"
-#endif
+"vTexCoord1 = inTexCoord1;\n"
-#if ATTR_TEXCOORD1
+"#endif\n"
-    vTexCoord1 = inTexCoord1;
+"}\n"
-#endif
-}
-)"