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GLES: Add support for GL_ARM_shader_framebuffer_fetch

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This commit is contained in:
wheremyfoodat 2024-10-13 23:47:27 +03:00
parent 001ebec631
commit 2460050e8d
3 changed files with 22 additions and 5 deletions
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5
include/renderer_gl/gl_driver.hpp
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@ -4,6 +4,9 @@
// Stuff like whether specific extensions are supported, and potentially things like OpenGL context information
namespace OpenGL {
struct Driver {
bool supportsFbFetch = false;
bool supportsExtFbFetch = false;
bool supportsArmFbFetch = false;
bool supportFbFetch() const { return supportsExtFbFetch || supportsArmFbFetch; }
};
} // namespace OpenGL

19
src/core/PICA/shader_gen_glsl.cpp
View file

@ -108,11 +108,24 @@ std::string FragmentGenerator::generate(const FragmentConfig& config, void* driv
}
// For GLES we need to enable & use the framebuffer fetch extension in order to emulate logic ops
const bool emitLogicOps = api == API::GLES && config.outConfig.logicOpMode != PICA::LogicOpMode::Copy && driverInfo != nullptr &&
static_cast<OpenGL::Driver*>(driverInfo)->supportsFbFetch;
bool emitLogicOps = api == API::GLES && config.outConfig.logicOpMode != PICA::LogicOpMode::Copy && driverInfo != nullptr;
if (emitLogicOps) {
ret += "\n#extension GL_EXT_shader_framebuffer_fetch : enable\n";
auto driver = static_cast<OpenGL::Driver*>(driverInfo);
// If the driver does not support framebuffer fetch at all, don't emit logic op code
if (!driver->supportFbFetch()) {
emitLogicOps = false;
}
// Figure out which fb fetch extension we have and enable it
else {
if (driver->supportsExtFbFetch) {
ret += "\n#extension GL_EXT_shader_framebuffer_fetch : enable\n";
} else if (driver->supportsArmFbFetch) {
ret += "\n#extension GL_ARM_shader_framebuffer_fetch : enable\n#define gl_LastFragData gl_LastFragColorARM\n";
}
}
}
bool unimplementedFlag = false;

3
src/core/renderer_gl/renderer_gl.cpp
View file

@ -168,7 +168,8 @@ void RendererGL::initGraphicsContextInternal() {
reset();
// Populate our driver info structure
driverInfo.supportsFbFetch = GLAD_GL_EXT_shader_framebuffer_fetch != 0;
driverInfo.supportsExtFbFetch = GLAD_GL_EXT_shader_framebuffer_fetch != 0;
driverInfo.supportsArmFbFetch = GLAD_GL_ARM_shader_framebuffer_fetch != 0;
// Initialize the default vertex shader used with shadergen
std::string defaultShadergenVSSource = fragShaderGen.getDefaultVertexShader();