diff options
Diffstat (limited to 'source/blender/draw/engines/workbench/shaders/workbench_image_lib.glsl')
-rw-r--r-- | source/blender/draw/engines/workbench/shaders/workbench_image_lib.glsl | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_image_lib.glsl b/source/blender/draw/engines/workbench/shaders/workbench_image_lib.glsl new file mode 100644 index 00000000000..6f99739f259 --- /dev/null +++ b/source/blender/draw/engines/workbench/shaders/workbench_image_lib.glsl @@ -0,0 +1,83 @@ + +/* TODO(fclem) deduplicate code. */ +bool node_tex_tile_lookup(inout vec3 co, sampler2DArray ima, sampler1DArray map) +{ + vec2 tile_pos = floor(co.xy); + + if (tile_pos.x < 0 || tile_pos.y < 0 || tile_pos.x >= 10) + return false; + + float tile = 10.0 * tile_pos.y + tile_pos.x; + if (tile >= textureSize(map, 0).x) + return false; + + /* Fetch tile information. */ + float tile_layer = texelFetch(map, ivec2(tile, 0), 0).x; + if (tile_layer < 0.0) + return false; + + vec4 tile_info = texelFetch(map, ivec2(tile, 1), 0); + + co = vec3(((co.xy - tile_pos) * tile_info.zw) + tile_info.xy, tile_layer); + return true; +} + +vec4 workbench_sample_texture(sampler2D image, vec2 coord, bool nearest_sampling) +{ + vec2 tex_size = vec2(textureSize(image, 0).xy); + /* TODO(fclem) We could do the same with sampler objects. + * But this is a quick workaround instead of messing with the GPUTexture itself. */ + vec2 uv = nearest_sampling ? (floor(coord * tex_size) + 0.5) / tex_size : coord; + return texture(image, uv); +} + +vec4 workbench_sample_texture_array(sampler2DArray tile_array, + sampler1DArray tile_data, + vec2 coord, + bool nearest_sampling) +{ + vec2 tex_size = vec2(textureSize(tile_array, 0).xy); + + vec3 uv = vec3(coord, 0); + if (!node_tex_tile_lookup(uv, tile_array, tile_data)) + return vec4(1.0, 0.0, 1.0, 1.0); + + /* TODO(fclem) We could do the same with sampler objects. + * But this is a quick workaround instead of messing with the GPUTexture itself. */ + uv.xy = nearest_sampling ? (floor(uv.xy * tex_size) + 0.5) / tex_size : uv.xy; + return texture(tile_array, uv); +} + +uniform sampler2DArray imageTileArray; +uniform sampler1DArray imageTileData; +uniform sampler2D imageTexture; + +uniform float imageTransparencyCutoff = 0.1; +uniform bool imageNearest; +uniform bool imagePremult; + +vec3 workbench_image_color(vec2 uvs) +{ +#ifdef V3D_SHADING_TEXTURE_COLOR +# ifdef TEXTURE_IMAGE_ARRAY + vec4 color = workbench_sample_texture_array(imageTileArray, imageTileData, uvs, imageNearest); +# else + vec4 color = workbench_sample_texture(imageTexture, uvs, imageNearest); +# endif + + /* Unpremultiply if stored multiplied, since straight alpha is expected by shaders. */ + if (imagePremult && !(color.a == 0.0 || color.a == 1.0)) { + color.rgb /= color.a; + } + +# ifdef GPU_FRAGMENT_SHADER + if (color.a < imageTransparencyCutoff) { + discard; + } +# endif + + return color.rgb; +#else + return vec3(1.0); +#endif +} |