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gl_shader_util: Fix precision bug with alpha testing.

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- Alpha testing is not done with float32 precision, this makes the HW renderer match the SW renderer.
This commit is contained in:
bunnei 2015-10-01 18:34:10 -04:00
parent e3f4233cef
commit 82f3e6dc69
2 changed files with 9 additions and 9 deletions
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4
src/video_core/renderer_opengl/gl_rasterizer.cpp
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@ -195,7 +195,7 @@ void RasterizerOpenGL::RegenerateShaders() {
// Sync alpha reference
if (current_shader->uniform_alphatest_ref != -1)
glUniform1f(current_shader->uniform_alphatest_ref, regs.output_merger.alpha_test.ref / 255.0f);
glUniform1i(current_shader->uniform_alphatest_ref, regs.output_merger.alpha_test.ref);
// Sync combiner buffer color
if (current_shader->uniform_tev_combiner_buffer_color != -1) {
@ -655,7 +655,7 @@ void RasterizerOpenGL::SyncBlendColor() {
void RasterizerOpenGL::SyncAlphaTest() {
const auto& regs = Pica::g_state.regs;
if (current_shader->uniform_alphatest_ref != -1)
glUniform1f(current_shader->uniform_alphatest_ref, regs.output_merger.alpha_test.ref / 255.0f);
glUniform1i(current_shader->uniform_alphatest_ref, regs.output_merger.alpha_test.ref);
}
void RasterizerOpenGL::SyncLogicOp() {

14
src/video_core/renderer_opengl/gl_shader_util.cpp
View file

@ -336,22 +336,22 @@ void AppendAlphaTestCondition(std::string& shader, Pica::Regs::CompareFunc func)
shader += "false";
break;
case CompareFunc::Equal:
shader += "g_last_tex_env_out.a != alphatest_ref";
shader += "int(g_last_tex_env_out.a * 255.0f) != alphatest_ref";
break;
case CompareFunc::NotEqual:
shader += "g_last_tex_env_out.a == alphatest_ref";
shader += "int(g_last_tex_env_out.a * 255.0f) == alphatest_ref";
break;
case CompareFunc::LessThan:
shader += "g_last_tex_env_out.a >= alphatest_ref";
shader += "int(g_last_tex_env_out.a * 255.0f) >= alphatest_ref";
break;
case CompareFunc::LessThanOrEqual:
shader += "g_last_tex_env_out.a > alphatest_ref";
shader += "int(g_last_tex_env_out.a * 255.0f) > alphatest_ref";
break;
case CompareFunc::GreaterThan:
shader += "g_last_tex_env_out.a <= alphatest_ref";
shader += "int(g_last_tex_env_out.a * 255.0f) <= alphatest_ref";
break;
case CompareFunc::GreaterThanOrEqual:
shader += "g_last_tex_env_out.a < alphatest_ref";
shader += "int(g_last_tex_env_out.a * 255.0f) < alphatest_ref";
break;
default:
shader += "false";
@ -370,7 +370,7 @@ std::string GenerateFragmentShader(const ShaderCacheKey& config) {
in vec4 o[NUM_VTX_ATTR];
out vec4 color;
uniform float alphatest_ref;
uniform int alphatest_ref;
uniform vec4 const_color[NUM_TEV_STAGES];
uniform sampler2D tex[3];