test/source/blender/compositor/shaders/compositor_normalize.glsl

/* SPDX-FileCopyrightText: 2022 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

#include "gpu_shader_compositor_texture_utilities.glsl"

void main()
{
  ivec2 texel = ivec2(gl_GlobalInvocationID.xy);
  float value = texture_load(input_tx, texel).x;
  float normalized_value = (value - minimum) * scale;
  float clamped_value = clamp(normalized_value, 0.0, 1.0);
  imageStore(output_img, texel, vec4(clamped_value));
}
License headers: add SPDX licenses for '.glsl' files When GLSL sources were first included in Blender they were treated as data (like blend files) and had no license header. Since then GLSL has been used for more sophisticated features (EEVEE & real-time compositing) where it makes sense to include licensing information. Add SPDX copyright headers to .glsl files, matching headers used for C/C++, also include GLSL files in the license checking script. As leading C-comments are now stripped, added binary size of comments is no longer a concern. Ref !111247 2023-08-24 10:54:59 +10:00			`/* SPDX-FileCopyrightText: 2022 Blender Authors`
			`*`
			`* SPDX-License-Identifier: GPL-2.0-or-later */`

GPU: Change GLSL include directive This changes the include directive to use the standard C preprocessor `#include` directive. The regex to applied to all glsl sources is: `pragma BLENDER_REQUIRE\((\w+\.glsl)\)` `include "$1"` This allow C++ linter to parse the code and allow easier codebase traversal. However there is a small catch. While it does work like a standard include directive when the code is treated as C++, it doesn't when compiled by our shader backends. In this case, we still use our dependency concatenation approach instead of file injection. This means that included files will always be prepended when compiled to GLSL and a file cannot be appended more than once. This is why all GLSL lib file should have the `#pragma once` directive and always be included at the start of the file. These requirements are actually already enforced by our code-style in practice. On the implementation, the source needed to be mutated to comment the `#pragma once` and `#include`. This is needed to avoid GLSL compiler error out as this is an extension that not all vendor supports. Rel #127983 Pull Request: https://projects.blender.org/blender/blender/pulls/128076 2024-10-04 15:48:22 +02:00			`#include "gpu_shader_compositor_texture_utilities.glsl"`
Realtime Compositor: Implement normalize node This patch implements the normalize node for the realtime compositor. Differential Revision: https://developer.blender.org/D16279 Reviewed By: Clement Foucault 2022-10-20 16:31:35 +02:00
			`void main()`
			`{`
			`ivec2 texel = ivec2(gl_GlobalInvocationID.xy);`
			`float value = texture_load(input_tx, texel).x;`
			`float normalized_value = (value - minimum) * scale;`
			`float clamped_value = clamp(normalized_value, 0.0, 1.0);`
			`imageStore(output_img, texel, vec4(clamped_value));`
			`}`