bc7412860a
This patch adds support for Bilinear and Bicubic interpolation for the Map UV node. Pull Request: https://projects.blender.org/blender/blender/pulls/140351
27 lines
1009 B
GLSL
27 lines
1009 B
GLSL
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "gpu_shader_bicubic_sampler_lib.glsl"
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#include "gpu_shader_compositor_texture_utilities.glsl"
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void main()
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{
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int2 texel = int2(gl_GlobalInvocationID.xy);
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float2 uv_coordinates = texture_load(uv_tx, texel).xy;
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float4 sampled_color = SAMPLER_FUNCTION(input_tx, uv_coordinates);
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/* The UV texture is assumed to contain an alpha channel as its third channel, since the UV
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* coordinates might be defined in only a subset area of the UV texture as mentioned. In that
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* case, the alpha is typically opaque at the subset area and transparent everywhere else, and
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* alpha pre-multiplication is then performed. This format of having an alpha channel in the UV
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* coordinates is the format used by UV passes in render engines, hence the mentioned logic. */
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float alpha = texture_load(uv_tx, texel).z;
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float4 result = sampled_color * alpha;
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imageStore(output_img, texel, result);
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}
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