diff options
Diffstat (limited to 'src/shader_distortion.h')
| -rw-r--r-- | src/shader_distortion.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/shader_distortion.h b/src/shader_distortion.h new file mode 100644 index 00000000..e4ce5d6c --- /dev/null +++ b/src/shader_distortion.h @@ -0,0 +1,91 @@ + +// Vertex shader definition to embed, no external file required +static const char vDistortionShaderStr[] = +#if defined(GRAPHICS_API_OPENGL_21) +"#version 120 \n" +#elif defined(GRAPHICS_API_OPENGL_ES2) +"#version 100 \n" +#endif +#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) +"attribute vec3 vertexPosition; \n" +"attribute vec2 vertexTexCoord; \n" +"attribute vec4 vertexColor; \n" +"varying vec2 fragTexCoord; \n" +"varying vec4 fragColor; \n" +#elif defined(GRAPHICS_API_OPENGL_33) +"#version 330 \n" +"in vec3 vertexPosition; \n" +"in vec2 vertexTexCoord; \n" +"in vec4 vertexColor; \n" +"out vec2 fragTexCoord; \n" +"out vec4 fragColor; \n" +#endif +"uniform mat4 mvpMatrix; \n" +"void main() \n" +"{ \n" +" fragTexCoord = vertexTexCoord; \n" +" fragColor = vertexColor; \n" +" gl_Position = mvpMatrix*vec4(vertexPosition, 1.0); \n" +"} \n"; + +// Fragment shader definition to embed, no external file required +static const char fDistortionShaderStr[] = +#if defined(GRAPHICS_API_OPENGL_21) +"#version 120 \n" +#elif defined(GRAPHICS_API_OPENGL_ES2) +"#version 100 \n" +"precision mediump float; \n" // precision required for OpenGL ES2 (WebGL) +#endif +#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) +"varying vec2 fragTexCoord; \n" +"varying vec4 fragColor; \n" +#elif defined(GRAPHICS_API_OPENGL_33) +"#version 330 \n" +"in vec2 fragTexCoord; \n" +"in vec4 fragColor; \n" +"out vec4 finalColor; \n" +#endif +"uniform sampler2D texture0; \n" +"uniform vec2 leftLensCenter = vec2(0.288, 0.5); \n" +"uniform vec2 rightLensCenter = vec2(0.712, 0.5); \n" +"uniform vec2 leftScreenCenter = vec2(0.25, 0.5); \n" +"uniform vec2 rightScreenCenter = vec2(0.75, 0.5); \n" +"uniform vec2 scale = vec2(0.25, 0.45); \n" +"uniform vec2 scaleIn = vec2(4, 2.2222); \n" +"uniform vec4 hmdWarpParam = vec4(1, 0.22, 0.24, 0); \n" +"uniform vec4 chromaAbParam = vec4(0.996, -0.004, 1.014, 0.0); \n" +"void main() \n" +"{ \n" +" vec2 lensCenter = fragTexCoord.x < 0.5 ? leftLensCenter : rightLensCenter; \n" +" vec2 screenCenter = fragTexCoord.x < 0.5 ? leftScreenCenter : rightScreenCenter; \n" +" vec2 theta = (fragTexCoord - lensCenter)*scaleIn; \n" +" float rSq = theta.x*theta.x + theta.y*theta.y; \n" +" vec2 theta1 = theta*(hmdWarpParam.x + hmdWarpParam.y*rSq + hmdWarpParam.z*rSq*rSq + hmdWarpParam.w*rSq*rSq*rSq); \n" +" vec2 thetaBlue = theta1*(chromaAbParam.z + chromaAbParam.w*rSq); \n" +" vec2 tcBlue = lensCenter + scale*thetaBlue; \n" +" if (any(bvec2(clamp(tcBlue, screenCenter - vec2(0.25, 0.5), screenCenter + vec2(0.25, 0.5)) - tcBlue))) \n" +" { \n" +" finalColor = vec4(0.0, 0.0, 0.0, 1.0); \n" +" } \n" +" else \n" +" { \n" +#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) +" float blue = texture2D(texture0, tcBlue).b; \n" +" vec2 tcGreen = lensCenter + scale*theta1; \n" +" float green = texture2D(texture0, tcGreen).g; \n" +#elif defined(GRAPHICS_API_OPENGL_33) +" float blue = texture(texture0, tcBlue).b; \n" +" vec2 tcGreen = lensCenter + scale*theta1; \n" +" float green = texture(texture0, tcGreen).g; \n" +#endif +" vec2 thetaRed = theta1*(chromaAbParam.x + chromaAbParam.y*rSq); \n" +" vec2 tcRed = lensCenter + scale*thetaRed; \n" +#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21) +" float red = texture2D(texture0, tcRed).r; \n" +" gl_FragColor = vec4(red, green, blue, 1.0); \n" +#elif defined(GRAPHICS_API_OPENGL_33) +" float red = texture(texture0, tcRed).r; \n" +" finalColor = vec4(red, green, blue, 1.0); \n" +#endif +" } \n" +"} \n"; |