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gl_shader_gen: Support vertical/horizontal viewport flipping. (#347)

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* gl_shader_gen: Support vertical/horizontal viewport flipping.

* fixup! gl_shader_gen: Support vertical/horizontal viewport flipping.
This commit is contained in:
bunnei 2018-04-18 16:42:40 -04:00 • committed by GitHub
parent 6a999cf800
commit ce4f159b1c
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 29 additions and 5 deletions
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10
src/video_core/renderer_opengl/gl_shader_gen.cpp
View file

@ -29,9 +29,15 @@ out gl_PerVertex {
out vec4 position;
layout (std140) uniform vs_config {
vec4 viewport_flip;
};
void main() {
exec_shader();
// Viewport can be flipped, which is unsupported by glViewport
position.xy *= viewport_flip.xy;
gl_Position = position;
}
)";
@ -52,6 +58,10 @@ ProgramResult GenerateFragmentShader(const ShaderSetup& setup, const MaxwellFSCo
in vec4 position;
out vec4 color;
layout (std140) uniform fs_config {
vec4 viewport_flip;
};
uniform sampler2D tex[32];
void main() {

8
src/video_core/renderer_opengl/gl_shader_manager.cpp
View file

@ -53,6 +53,12 @@ void SetShaderSamplerBindings(GLuint shader) {
} // namespace Impl
void MaxwellUniformData::SetFromRegs(const Maxwell3D::State::ShaderStageInfo& shader_stage) {}
void MaxwellUniformData::SetFromRegs(const Maxwell3D::State::ShaderStageInfo& shader_stage) {
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
// TODO(bunnei): Support more than one viewport
viewport_flip[0] = regs.viewport_transform[0].scale_x < 0.0 ? -1.0 : 1.0;
viewport_flip[1] = regs.viewport_transform[0].scale_y < 0.0 ? -1.0 : 1.0;
}
} // namespace GLShader

5
src/video_core/renderer_opengl/gl_shader_manager.h
View file

@ -30,10 +30,9 @@ void SetShaderSamplerBindings(GLuint shader);
// Not following that rule will cause problems on some AMD drivers.
struct MaxwellUniformData {
void SetFromRegs(const Maxwell3D::State::ShaderStageInfo& shader_stage);
// TODO(Subv): Use this for something.
alignas(16) GLvec4 viewport_flip;
};
// static_assert(sizeof(MaxwellUniformData) == 1024, "MaxwellUniformData structure size is
// incorrect");
static_assert(sizeof(MaxwellUniformData) == 16, "MaxwellUniformData structure size is incorrect");
static_assert(sizeof(MaxwellUniformData) < 16384,
"MaxwellUniformData structure must be less than 16kb as per the OpenGL spec");