gl_rasterizer: Implement partial color clear and stencil clear.
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da3da6be90
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@ -14,6 +14,7 @@
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#include "common/logging/log.h"
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#include "common/math_util.h"
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#include "common/microprofile.h"
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#include "common/scope_exit.h"
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#include "core/core.h"
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#include "core/frontend/emu_window.h"
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#include "core/hle/kernel/process.h"
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@ -364,41 +365,70 @@ std::pair<Surface, Surface> RasterizerOpenGL::ConfigureFramebuffers(bool using_c
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}
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void RasterizerOpenGL::Clear() {
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const auto& regs = Core::System::GetInstance().GPU().Maxwell3D().regs;
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const auto prev_state{state};
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SCOPE_EXIT({ prev_state.Apply(); });
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const auto& regs = Core::System::GetInstance().GPU().Maxwell3D().regs;
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bool use_color_fb = false;
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bool use_depth_fb = false;
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GLbitfield clear_mask = 0;
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if (regs.clear_buffers.R && regs.clear_buffers.G && regs.clear_buffers.B &&
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OpenGLState clear_state;
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clear_state.draw.draw_framebuffer = state.draw.draw_framebuffer;
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clear_state.color_mask.red_enabled = regs.clear_buffers.R ? GL_TRUE : GL_FALSE;
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clear_state.color_mask.green_enabled = regs.clear_buffers.G ? GL_TRUE : GL_FALSE;
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clear_state.color_mask.blue_enabled = regs.clear_buffers.B ? GL_TRUE : GL_FALSE;
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clear_state.color_mask.alpha_enabled = regs.clear_buffers.A ? GL_TRUE : GL_FALSE;
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GLbitfield clear_mask{};
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if (regs.clear_buffers.R || regs.clear_buffers.G || regs.clear_buffers.B ||
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regs.clear_buffers.A) {
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clear_mask |= GL_COLOR_BUFFER_BIT;
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use_color_fb = true;
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if (regs.clear_buffers.RT == 0) {
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// We only support clearing the first color attachment for now
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clear_mask |= GL_COLOR_BUFFER_BIT;
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use_color_fb = true;
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} else {
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// TODO(subv): Add support for the other color attachments
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LOG_CRITICAL(HW_GPU, "Clear unimplemented for RT {}", regs.clear_buffers.RT);
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}
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}
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if (regs.clear_buffers.Z) {
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ASSERT_MSG(regs.zeta_enable != 0, "Tried to clear Z but buffer is not enabled!");
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use_depth_fb = true;
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clear_mask |= GL_DEPTH_BUFFER_BIT;
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use_depth_fb = regs.zeta_enable != 0;
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// Always enable the depth write when clearing the depth buffer. The depth write mask is
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// ignored when clearing the buffer in the Switch, but OpenGL obeys it so we set it to true.
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state.depth.test_enabled = true;
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state.depth.write_mask = GL_TRUE;
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state.depth.test_func = GL_ALWAYS;
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state.Apply();
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clear_state.depth.test_enabled = true;
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clear_state.depth.test_func = GL_ALWAYS;
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}
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if (regs.clear_buffers.S) {
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ASSERT_MSG(regs.zeta_enable != 0, "Tried to clear stencil but buffer is not enabled!");
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use_depth_fb = true;
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clear_mask |= GL_STENCIL_BUFFER_BIT;
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clear_state.stencil.test_enabled = true;
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}
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if (clear_mask == 0)
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if (!use_color_fb && !use_depth_fb) {
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// No color surface nor depth/stencil surface are enabled
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return;
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}
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if (clear_mask == 0) {
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// No clear mask is enabled
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return;
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}
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ScopeAcquireGLContext acquire_context{emu_window};
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auto [dirty_color_surface, dirty_depth_surface] =
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ConfigureFramebuffers(use_color_fb, use_depth_fb, false);
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// TODO(Subv): Support clearing only partial colors.
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clear_state.Apply();
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glClearColor(regs.clear_color[0], regs.clear_color[1], regs.clear_color[2],
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regs.clear_color[3]);
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glClearDepth(regs.clear_depth);
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glClearStencil(regs.clear_stencil);
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glClear(clear_mask);
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