source/blender/gpu/shaders/material/gpu_shader_material_gamma.glsl

#pragma BLENDER_REQUIRE(gpu_shader_common_math_utils.glsl)

void node_gamma(vec4 col, float gamma, out vec4 outcol)
{
  outcol = col;

  if (col.r > 0.0) {
    outcol.r = compatible_pow(col.r, gamma);
  }
  if (col.g > 0.0) {
    outcol.g = compatible_pow(col.g, gamma);
  }
  if (col.b > 0.0) {
    outcol.b = compatible_pow(col.b, gamma);
  }
}
GPU: Move common shaders into a common directory This patch moves some of the utility library shaders into a common directory and makes the necessary renames across shaders. Additionally, material-specific transform functions were moved outside of math utils into a separate transform_utils.glsl file. This is needed in preparation for the viewport compositor, which will make use of some of those utilities and will require all material specific bit to be removed out of those files. Reviewed By: fclem Differential Revision: https://developer.blender.org/D14688 2022-05-06 12:58:14 +02:00			`#pragma BLENDER_REQUIRE(gpu_shader_common_math_utils.glsl)`
GPU: Make nodetree GLSL Codegen render engine agnostic This commit removes all EEVEE specific code from the `gpu_shader_material*.glsl` files. It defines a clear interface to evaluate the closure nodes leaving more flexibility to the render engine. Some of the long standing workaround are fixed: - bump mapping support is no longer duplicating a lot of node and is instead compiled into a function call. - bump rewiring to Normal socket is no longer needed as we now use a global `g_data.N` for that. Closure sampling with upstread weight eval is now supported if the engine needs it. This also makes all the material GLSL sources use `GPUSource` for better debugging experience. The `GPUFunction` parsing now happens in `GPUSource` creation. The whole `GPUCodegen` now uses the `ShaderCreateInfo` and is object type agnostic. Is has also been rewritten in C++. This patch changes a view behavior for EEVEE: - Mix shader node factor imput is now clamped. - Tangent Vector displacement behavior is now matching cycles. - The chosen BSDF used for SSR might change. - Hair shading may have very small changes on very large hairs when using hair polygon stripes. - ShaderToRGB node will remove any SSR and SSS form a shader. - SSS radius input now is no longer a scaling factor but defines an average radius. The SSS kernel "shape" (radii) are still defined by the socket default values. Appart from the listed changes no other regressions are expected. 2022-04-14 18:47:58 +02:00
GPU: Split gpu_shader_material into multiple files. This patch continue the efforts to split the `gpu_shader_material` file started in D5569. Dependency resolution is now recursive. Each shading node gets its own file. Additionally, some utility files are added to be shared between files, like `math_util`, `color_util`, and `hash`. Some files are always included because they may be used in the execution function, like `world_normals`. Some glsl functions appeared to be unused, so they were removed, like `output_node`, `bits_to_01`, and `exp_blender`. Other functions have been renamed to be more general and get used as utils, like `texco_norm` which became `vector_normalize`. A lot of the opengl tests fails, but those same tests also fail in master, so this is probably unrelated to this patch. Reviewers: brecht Differential Revision: https://developer.blender.org/D5616 2019-08-30 17:23:04 +02:00			`void node_gamma(vec4 col, float gamma, out vec4 outcol)`
			`{`
			`outcol = col;`

			`if (col.r > 0.0) {`
			`outcol.r = compatible_pow(col.r, gamma);`
			`}`
			`if (col.g > 0.0) {`
			`outcol.g = compatible_pow(col.g, gamma);`
			`}`
			`if (col.b > 0.0) {`
			`outcol.b = compatible_pow(col.b, gamma);`
			`}`
			`}`