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LibSoftGPU: Remove OpenGL type for alpha test func

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Replaces the OpenGL enum used for setting the alpha test func in
RasterizerOptions with out own enum.
This commit is contained in:
Stephan Unverwerth 2021-12-22 22:59:07 +01:00 • committed by Brian Gianforcaro
parent 7d49015403
commit 40bd73bdef
3 changed files with 53 additions and 10 deletions
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31
Userland/Libraries/LibGL/SoftwareGLContext.cpp
View file

@ -1159,7 +1159,36 @@ void SoftwareGLContext::gl_alpha_func(GLenum func, GLclampf ref)
m_alpha_test_ref_value = ref;
auto options = m_rasterizer.options();
options.alpha_test_func = m_alpha_test_func;
switch (func) {
case GL_NEVER:
options.alpha_test_func = SoftGPU::AlphaTestFunction::Never;
break;
case GL_ALWAYS:
options.alpha_test_func = SoftGPU::AlphaTestFunction::Always;
break;
case GL_LESS:
options.alpha_test_func = SoftGPU::AlphaTestFunction::Less;
break;
case GL_LEQUAL:
options.alpha_test_func = SoftGPU::AlphaTestFunction::LessOrEqual;
break;
case GL_EQUAL:
options.alpha_test_func = SoftGPU::AlphaTestFunction::Equal;
break;
case GL_NOTEQUAL:
options.alpha_test_func = SoftGPU::AlphaTestFunction::NotEqual;
break;
case GL_GEQUAL:
options.alpha_test_func = SoftGPU::AlphaTestFunction::GreaterOrEqual;
break;
case GL_GREATER:
options.alpha_test_func = SoftGPU::AlphaTestFunction::Greater;
break;
default:
VERIFY_NOT_REACHED();
}
options.alpha_test_ref_value = m_alpha_test_ref_value;
m_rasterizer.set_options(options);
}

19
Userland/Libraries/LibSoftGPU/Device.cpp
View file

@ -396,11 +396,11 @@ static void rasterize_triangle(const RasterizerOptions& options, Gfx::Bitmap& re
}
}
if (options.enable_alpha_test && options.alpha_test_func != GL_ALWAYS) {
if (options.enable_alpha_test && options.alpha_test_func != AlphaTestFunction::Always) {
// FIXME: I'm not sure if this is the right place to test this.
// If we tested this right at the beginning of our rasterizer routine
// we could skip a lot of work but the GL spec might disagree.
if (options.alpha_test_func == GL_NEVER)
if (options.alpha_test_func == AlphaTestFunction::Never)
continue;
for (int y = 0; y < RASTERIZER_BLOCK_SIZE; y++) {
@ -412,24 +412,27 @@ static void rasterize_triangle(const RasterizerOptions& options, Gfx::Bitmap& re
bool passed = true;
switch (options.alpha_test_func) {
case GL_LESS:
case AlphaTestFunction::Less:
passed = src->w() < options.alpha_test_ref_value;
break;
case GL_EQUAL:
case AlphaTestFunction::Equal:
passed = src->w() == options.alpha_test_ref_value;
break;
case GL_LEQUAL:
case AlphaTestFunction::LessOrEqual:
passed = src->w() <= options.alpha_test_ref_value;
break;
case GL_GREATER:
case AlphaTestFunction::Greater:
passed = src->w() > options.alpha_test_ref_value;
break;
case GL_NOTEQUAL:
case AlphaTestFunction::NotEqual:
passed = src->w() != options.alpha_test_ref_value;
break;
case GL_GEQUAL:
case AlphaTestFunction::GreaterOrEqual:
passed = src->w() >= options.alpha_test_ref_value;
break;
case AlphaTestFunction::Never:
case AlphaTestFunction::Always:
VERIFY_NOT_REACHED();
}
if (!passed)

13
Userland/Libraries/LibSoftGPU/Device.h
View file

@ -26,12 +26,23 @@
namespace SoftGPU {
enum class AlphaTestFunction {
Never,
Always,
Less,
LessOrEqual,
Equal,
NotEqual,
GreaterOrEqual,
Greater,
};
struct RasterizerOptions {
bool shade_smooth { true };
bool enable_depth_test { false };
bool enable_depth_write { true };
bool enable_alpha_test { false };
GLenum alpha_test_func { GL_ALWAYS };
AlphaTestFunction alpha_test_func { AlphaTestFunction::Always };
float alpha_test_ref_value { 0 };
bool enable_blending { false };
GLenum blend_source_factor { GL_ONE };