diff options
Diffstat (limited to 'source/blender/draw/engines/eevee/shaders/effect_dof_vert.glsl')
-rw-r--r-- | source/blender/draw/engines/eevee/shaders/effect_dof_vert.glsl | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee/shaders/effect_dof_vert.glsl b/source/blender/draw/engines/eevee/shaders/effect_dof_vert.glsl new file mode 100644 index 00000000000..3899365a771 --- /dev/null +++ b/source/blender/draw/engines/eevee/shaders/effect_dof_vert.glsl @@ -0,0 +1,92 @@ + +in vec2 pos; +in vec2 uvs; + +uniform vec2 layerSelection; + +uniform sampler2D colorBuffer; +uniform sampler2D cocBuffer; + +flat out vec4 color; +out vec2 particlecoord; + +#define M_PI 3.1415926535897932384626433832795 + +/* geometry shading pass, calculate a texture coordinate based on the indexed id */ +void step_scatter() +{ + ivec2 tex_size = textureSize(cocBuffer, 0); + vec2 texel_size = 1.0 / vec2(tex_size); + + int t_id = gl_VertexID / 3; /* Triangle Id */ + + ivec2 texelco = ivec2(0); + /* some math to get the target pixel */ + texelco.x = t_id % tex_size.x; + texelco.y = t_id / tex_size.x; + + float coc = dot(layerSelection, texelFetch(cocBuffer, texelco, 0).rg); + + /* Clamp to max size for performance */ + coc = min(coc, 100.0); + + if (coc >= 1.0) { + color = texelFetch(colorBuffer, texelco, 0); + /* find the area the pixel will cover and divide the color by it */ + float alpha = 1.0 / (coc * coc * M_PI); + color *= alpha; + color.a = alpha; + } + else { + color = vec4(0.0); + } + + /* Generate Triangle : less memory fetches from a VBO */ + int v_id = gl_VertexID % 3; /* Vertex Id */ + + /* Extend to cover at least the unit circle */ + const float extend = (cos(M_PI / 4.0) + 1.0) * 2.0; + /* Crappy diagram + * ex 1 + * | \ + * | \ + * 1 | \ + * | \ + * | \ + * 0 | x \ + * | Circle \ + * | Origin \ + * -1 0 --------------- 2 + * -1 0 1 ex + **/ + gl_Position.x = float(v_id / 2) * extend - 1.0; /* int divisor round down */ + gl_Position.y = float(v_id % 2) * extend - 1.0; + gl_Position.z = 0.0; + gl_Position.w = 1.0; + + /* Generate Triangle */ + particlecoord = gl_Position.xy; + + gl_Position.xy *= coc * texel_size; + gl_Position.xy -= 1.0 - 0.5 * texel_size; /* NDC Bottom left */ + gl_Position.xy += (0.5 + vec2(texelco) * 2.0) * texel_size; +} + +out vec2 uvcoord; + +void passthrough() +{ + uvcoord = uvs; + gl_Position = vec4(pos, 0.0, 1.0); +} + +void main() +{ +#if defined(STEP_DOWNSAMPLE) + passthrough(); +#elif defined(STEP_SCATTER) + step_scatter(); +#elif defined(STEP_RESOLVE) + passthrough(); +#endif +}
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