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Shadergen: Minimize shader compilation time by caching the default VS

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wheremyfoodat 2024-07-19 14:35:01 +03:00
parent ac55c3e324
commit 5c1e2912a3
5 changed files with 57 additions and 37 deletions
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2
src/core/PICA/shader_gen_glsl.cpp
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@ -34,7 +34,7 @@ static constexpr const char* uniformDefinition = R"(
// This is particularly intuitive in several places, such as checking if a LUT is enabled
static constexpr int spotlightLutIndex = 2;
std::string FragmentGenerator::getVertexShader(const PICARegs& regs) {
std::string FragmentGenerator::getDefaultVertexShader() {
std::string ret = "";
switch (api) {

8
src/core/renderer_gl/renderer_gl.cpp
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@ -162,6 +162,10 @@ void RendererGL::initGraphicsContextInternal() {
OpenGL::setViewport(oldViewport[0], oldViewport[1], oldViewport[2], oldViewport[3]);
reset();
// Initialize the default vertex shader used with shadergen
std::string defaultShadergenVSSource = fragShaderGen.getDefaultVertexShader();
defaultShadergenVs.create({defaultShadergenVSSource.c_str(), defaultShadergenVSSource.size()}, OpenGL::Vertex);
}
// The OpenGL renderer doesn't need to do anything with the GL context (For Qt frontend) or the SDL window (For SDL frontend)
@ -810,12 +814,10 @@ OpenGL::Program& RendererGL::getSpecializedShader() {
OpenGL::Program& program = programEntry.program;
if (!program.exists()) {
std::string vs = fragShaderGen.getVertexShader(regs);
std::string fs = fragShaderGen.generate(regs, fsConfig);
OpenGL::Shader vertShader({vs.c_str(), vs.size()}, OpenGL::Vertex);
OpenGL::Shader fragShader({fs.c_str(), fs.size()}, OpenGL::Fragment);
program.create({vertShader, fragShader});
program.create({defaultShadergenVs, fragShader});
gl.useProgram(program);
// Init sampler objects. Texture 0 goes in texture unit 0, texture 1 in TU 1, texture 2 in TU 2, and the light maps go in TU 3