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https://github.com/FunkyFr3sh/cnc-ddraw.git
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256 lines
7.5 KiB
C
256 lines
7.5 KiB
C
#ifndef OPENGLSHADER_H
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#define OPENGLSHADER_H
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/* OpenGL 2.0 */
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const char PASSTHROUGH_VERT_SHADER_110[] =
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"#version 110\n"
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"varying vec2 TEX0; \n"
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"\n"
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"void main()\n"
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"{\n"
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" gl_Position = ftransform(); \n"
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" TEX0 = gl_MultiTexCoord0.xy; \n"
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"}\n";
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const char PALETTE_FRAG_SHADER_110[] =
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"#version 110\n"
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"uniform sampler2D SurfaceTex; \n"
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"uniform sampler2D PaletteTex; \n"
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"varying vec2 TEX0; \n"
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"\n"
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"void main()\n"
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"{\n"
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" vec4 pIndex = texture2D(SurfaceTex, TEX0); \n"
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" gl_FragColor = texture2D(PaletteTex, vec2(pIndex.r * (255.0/256.0) + (0.5/256.0), 0)); \n"
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"}\n";
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const char PASSTHROUGH_FRAG_SHADER_110[] =
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"#version 110\n"
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"uniform sampler2D SurfaceTex; \n"
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"varying vec2 TEX0; \n"
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"\n"
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"void main()\n"
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"{\n"
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" vec4 texel = texture2D(SurfaceTex, TEX0); \n"
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" gl_FragColor = texel; \n"
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"}\n";
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/* OpenGL 3.0 */
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const char PASSTHROUGH_VERT_SHADER[] =
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"#version 130\n"
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"in vec4 VertexCoord;\n"
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"in vec4 COLOR;\n"
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"in vec4 TexCoord;\n"
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"out vec4 COL0;\n"
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"out vec4 TEX0;\n"
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"uniform mat4 MVPMatrix;\n"
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"\n"
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"void main()\n"
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"{\n"
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" gl_Position = MVPMatrix * VertexCoord;\n"
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" COL0 = COLOR;\n"
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" TEX0.xy = TexCoord.xy;\n"
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"}\n";
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const char PALETTE_FRAG_SHADER[] =
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"#version 130\n"
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"out vec4 FragColor;\n"
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"uniform sampler2D SurfaceTex;\n"
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"uniform sampler2D PaletteTex;\n"
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"in vec4 TEX0;\n"
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"\n"
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"void main()\n"
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"{\n"
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" vec4 pIndex = texture(SurfaceTex, TEX0.xy);\n"
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" FragColor = texture(PaletteTex, vec2(pIndex.r * (255.0/256.0) + (0.5/256.0), 0));\n"
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"}\n";
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const char PASSTHROUGH_FRAG_SHADER[] =
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"#version 130\n"
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"out vec4 FragColor;\n"
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"uniform sampler2D SurfaceTex;\n"
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"in vec4 TEX0;\n"
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"\n"
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"void main()\n"
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"{\n"
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" vec4 texel = texture(SurfaceTex, TEX0.xy);\n"
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" FragColor = texel;\n"
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"}\n";
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/* OpenGL 3.2 (Core Profile) */
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const char PASSTHROUGH_VERT_SHADER_CORE[] =
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"#version 150\n"
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"in vec4 VertexCoord;\n"
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"in vec4 COLOR;\n"
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"in vec4 TexCoord;\n"
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"out vec4 COL0;\n"
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"out vec4 TEX0;\n"
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"uniform mat4 MVPMatrix;\n"
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"\n"
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"void main()\n"
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"{\n"
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" gl_Position = MVPMatrix * VertexCoord;\n"
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" COL0 = COLOR;\n"
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" TEX0.xy = TexCoord.xy;\n"
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"}\n";
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const char PALETTE_FRAG_SHADER_CORE[] =
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"#version 150\n"
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"out vec4 FragColor;\n"
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"uniform sampler2D SurfaceTex;\n"
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"uniform sampler2D PaletteTex;\n"
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"in vec4 TEX0;\n"
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"\n"
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"void main()\n"
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"{\n"
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" vec4 pIndex = texture(SurfaceTex, TEX0.xy);\n"
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" FragColor = texture(PaletteTex, vec2(pIndex.r * (255.0/256.0) + (0.5/256.0), 0));\n"
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"}\n";
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const char PASSTHROUGH_FRAG_SHADER_CORE[] =
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"#version 150\n"
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"out vec4 FragColor;\n"
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"uniform sampler2D SurfaceTex;\n"
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"in vec4 TEX0;\n"
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"\n"
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"void main()\n"
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"{\n"
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" vec4 texel = texture(SurfaceTex, TEX0.xy);\n"
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" FragColor = texel;\n"
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"}\n";
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/*
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// The following code is licensed under the MIT license: https://gist.github.com/TheRealMJP/bc503b0b87b643d3505d41eab8b332ae
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// Ported from code: https://gist.github.com/TheRealMJP/c83b8c0f46b63f3a88a5986f4fa982b1
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// Samples a texture with Catmull-Rom filtering, using 9 texture fetches instead of 16.
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// See http://vec3.ca/bicubic-filtering-in-fewer-taps/ for more details
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// Modified to use 5 texture fetches
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*/
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const char CATMULL_ROM_FRAG_SHADER[] =
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"#version 130\n"
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"out mediump vec4 FragColor;\n"
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"uniform int FrameDirection;\n"
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"uniform int FrameCount;\n"
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"uniform vec2 OutputSize;\n"
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"uniform vec2 TextureSize;\n"
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"uniform vec2 InputSize;\n"
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"uniform sampler2D Texture;\n"
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"in vec4 TEX0;\n"
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"\n"
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"#define Source Texture\n"
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"#define vTexCoord TEX0.xy\n"
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"\n"
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"#define SourceSize vec4(TextureSize, 1.0 / TextureSize)\n"
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"#define outsize vec4(OutputSize, 1.0 / OutputSize)\n"
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"\n"
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"void main()\n"
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"{\n"
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" vec2 samplePos = vTexCoord * SourceSize.xy;\n"
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" vec2 texPos1 = floor(samplePos - 0.5) + 0.5;\n"
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"\n"
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" vec2 f = samplePos - texPos1;\n"
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"\n"
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" vec2 w0 = f * (-0.5 + f * (1.0 - 0.5 * f));\n"
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" vec2 w1 = 1.0 + f * f * (-2.5 + 1.5 * f);\n"
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" vec2 w2 = f * (0.5 + f * (2.0 - 1.5 * f));\n"
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" vec2 w3 = f * f * (-0.5 + 0.5 * f);\n"
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"\n"
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" vec2 w12 = w1 + w2;\n"
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" vec2 offset12 = w2 / (w1 + w2);\n"
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"\n"
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" vec2 texPos0 = texPos1 - 1.;\n"
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" vec2 texPos3 = texPos1 + 2.;\n"
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" vec2 texPos12 = texPos1 + offset12;\n"
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"\n"
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" texPos0 *= SourceSize.zw;\n"
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" texPos3 *= SourceSize.zw;\n"
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" texPos12 *= SourceSize.zw;\n"
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"\n"
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" float wtm = w12.x * w0.y;\n"
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" float wml = w0.x * w12.y;\n"
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" float wmm = w12.x * w12.y;\n"
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" float wmr = w3.x * w12.y;\n"
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" float wbm = w12.x * w3.y;\n"
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"\n"
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" vec3 result = vec3(0.0f);\n"
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"\n"
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" result += texture(Source, vec2(texPos12.x, texPos0.y)).rgb * wtm;\n"
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" result += texture(Source, vec2(texPos0.x, texPos12.y)).rgb * wml;\n"
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" result += texture(Source, vec2(texPos12.x, texPos12.y)).rgb * wmm;\n"
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" result += texture(Source, vec2(texPos3.x, texPos12.y)).rgb * wmr;\n"
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" result += texture(Source, vec2(texPos12.x, texPos3.y)).rgb * wbm;\n"
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"\n"
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" FragColor = vec4(result * (1. / (wtm + wml + wmm + wmr + wbm)), 1.0);\n"
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"}\n";
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const char CATMULL_ROM_FRAG_SHADER_CORE[] =
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"#version 150\n"
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"out mediump vec4 FragColor;\n"
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"uniform int FrameDirection;\n"
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"uniform int FrameCount;\n"
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"uniform vec2 OutputSize;\n"
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"uniform vec2 TextureSize;\n"
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"uniform vec2 InputSize;\n"
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"uniform sampler2D Texture;\n"
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"in vec4 TEX0;\n"
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"\n"
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"#define Source Texture\n"
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"#define vTexCoord TEX0.xy\n"
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"\n"
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"#define SourceSize vec4(TextureSize, 1.0 / TextureSize)\n"
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"#define outsize vec4(OutputSize, 1.0 / OutputSize)\n"
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"\n"
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"void main()\n"
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"{\n"
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" vec2 samplePos = vTexCoord * SourceSize.xy;\n"
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" vec2 texPos1 = floor(samplePos - 0.5) + 0.5;\n"
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"\n"
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" vec2 f = samplePos - texPos1;\n"
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"\n"
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" vec2 w0 = f * (-0.5 + f * (1.0 - 0.5 * f));\n"
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" vec2 w1 = 1.0 + f * f * (-2.5 + 1.5 * f);\n"
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" vec2 w2 = f * (0.5 + f * (2.0 - 1.5 * f));\n"
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" vec2 w3 = f * f * (-0.5 + 0.5 * f);\n"
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"\n"
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" vec2 w12 = w1 + w2;\n"
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" vec2 offset12 = w2 / (w1 + w2);\n"
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"\n"
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" vec2 texPos0 = texPos1 - 1.;\n"
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" vec2 texPos3 = texPos1 + 2.;\n"
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" vec2 texPos12 = texPos1 + offset12;\n"
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"\n"
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" texPos0 *= SourceSize.zw;\n"
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" texPos3 *= SourceSize.zw;\n"
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" texPos12 *= SourceSize.zw;\n"
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"\n"
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" float wtm = w12.x * w0.y;\n"
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" float wml = w0.x * w12.y;\n"
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" float wmm = w12.x * w12.y;\n"
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" float wmr = w3.x * w12.y;\n"
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" float wbm = w12.x * w3.y;\n"
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"\n"
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" vec3 result = vec3(0.0f);\n"
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"\n"
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" result += texture(Source, vec2(texPos12.x, texPos0.y)).rgb * wtm;\n"
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" result += texture(Source, vec2(texPos0.x, texPos12.y)).rgb * wml;\n"
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" result += texture(Source, vec2(texPos12.x, texPos12.y)).rgb * wmm;\n"
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" result += texture(Source, vec2(texPos3.x, texPos12.y)).rgb * wmr;\n"
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" result += texture(Source, vec2(texPos12.x, texPos3.y)).rgb * wbm;\n"
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"\n"
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" FragColor = vec4(result * (1. / (wtm + wml + wmm + wmr + wbm)), 1.0);\n"
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"}\n";
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#endif
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