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/* 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;
}
#ifndef WORKBENCH_SHADER_SHARED_H
uniform sampler2DArray imageTileArray;
uniform sampler1DArray imageTileData;
uniform sampler2D imageTexture;
uniform float imageTransparencyCutoff = 0.1;
uniform bool imagePremult;
#endif
vec3 workbench_image_color(vec2 uvs)
{
#ifdef V3D_SHADING_TEXTURE_COLOR
vec4 color;
# ifdef TEXTURE_IMAGE_ARRAY
vec3 co = vec3(uvs, 0.0);
if (node_tex_tile_lookup(co, imageTileArray, imageTileData)) {
color = texture(imageTileArray, co);
}
else {
color = vec4(1.0, 0.0, 1.0, 1.0);
}
# else
color = texture(imageTexture, uvs);
# 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
}
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