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GPU: Support emulating a depth buffer from PGXP depth values

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This commit is contained in:
Connor McLaughlin
2020-12-23 01:10:49 +10:00
parent f393ea618e
commit aa1543271e
13 changed files with 242 additions and 47 deletions
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43
src/core/gpu_hw_opengl.cpp
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@ -124,6 +124,7 @@ void GPU_HW_OpenGL::RestoreGraphicsAPIState()
m_uniform_stream_buffer->Bind();
m_vram_read_texture.Bind();
SetBlendMode();
m_current_depth_test = 0;
SetDepthFunc();
SetScissorFromDrawingArea();
m_batch_ubo_dirty = true;
@ -311,11 +312,14 @@ bool GPU_HW_OpenGL::CreateFramebuffer()
void GPU_HW_OpenGL::ClearFramebuffer()
{
const float depth_clear_value = m_pgxp_depth_buffer ? 1.0f : 0.0f;
glDisable(GL_SCISSOR_TEST);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
IsGLES() ? glClearDepthf(0.0f) : glClearDepth(0.0f);
IsGLES() ? glClearDepthf(depth_clear_value) : glClearDepth(depth_clear_value);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_SCISSOR_TEST);
m_last_depth_z = 1.0f;
SetFullVRAMDirtyRectangle();
}
@ -386,7 +390,7 @@ bool GPU_HW_OpenGL::CompilePrograms()
const bool use_binding_layout = GPU_HW_ShaderGen::UseGLSLBindingLayout();
GPU_HW_ShaderGen shadergen(m_host_display->GetRenderAPI(), m_resolution_scale, m_multisamples, m_per_sample_shading,
m_true_color, m_scaled_dithering, m_texture_filtering, m_using_uv_limits,
m_supports_dual_source_blend);
m_pgxp_depth_buffer, m_supports_dual_source_blend);
Common::Timer compile_time;
const int progress_total = (4 * 9 * 2 * 2) + (2 * 3) + 5;
@ -592,11 +596,7 @@ void GPU_HW_OpenGL::DrawBatchVertices(BatchRenderMode render_mode, u32 base_vert
SetBlendMode();
}
if (m_current_check_mask_before_draw != m_batch.check_mask_before_draw)
{
m_current_check_mask_before_draw = m_batch.check_mask_before_draw;
SetDepthFunc();
}
SetDepthFunc();
glDrawArrays(GL_TRIANGLES, m_batch_base_vertex, num_vertices);
}
@ -620,7 +620,16 @@ void GPU_HW_OpenGL::SetBlendMode()
void GPU_HW_OpenGL::SetDepthFunc()
{
glDepthFunc(m_current_check_mask_before_draw ? GL_GEQUAL : GL_ALWAYS);
SetDepthFunc(m_batch.use_depth_buffer ? GL_LEQUAL : (m_batch.check_mask_before_draw ? GL_GEQUAL : GL_ALWAYS));
}
void GPU_HW_OpenGL::SetDepthFunc(GLenum func)
{
if (m_current_depth_test == func)
return;
glDepthFunc(func);
m_current_depth_test = func;
}
void GPU_HW_OpenGL::SetScissorFromDrawingArea()
@ -830,7 +839,7 @@ void GPU_HW_OpenGL::FillVRAM(u32 x, u32 y, u32 width, u32 height, u32 color)
m_vram_interlaced_fill_program.Bind();
UploadUniformBuffer(&uniforms, sizeof(uniforms));
glDisable(GL_BLEND);
glDepthFunc(GL_ALWAYS);
SetDepthFunc(GL_ALWAYS);
glBindVertexArray(m_attributeless_vao_id);
glDrawArrays(GL_TRIANGLES, 0, 3);
@ -852,7 +861,7 @@ void GPU_HW_OpenGL::UpdateVRAM(u32 x, u32 y, u32 width, u32 height, const void*
m_texture_stream_buffer->Unbind();
glDisable(GL_BLEND);
glDepthFunc(check_mask ? GL_GEQUAL : GL_ALWAYS);
SetDepthFunc((check_mask && !m_pgxp_depth_buffer) ? GL_GEQUAL : GL_ALWAYS);
m_vram_write_program.Bind();
if (m_use_ssbo_for_vram_writes)
@ -961,7 +970,7 @@ void GPU_HW_OpenGL::CopyVRAM(u32 src_x, u32 src_y, u32 dst_x, u32 dst_y, u32 wid
glDisable(GL_SCISSOR_TEST);
glDisable(GL_BLEND);
glDepthFunc(m_GPUSTAT.check_mask_before_draw ? GL_GEQUAL : GL_ALWAYS);
SetDepthFunc((m_GPUSTAT.check_mask_before_draw && !m_pgxp_depth_buffer) ? GL_GEQUAL : GL_ALWAYS);
const Common::Rectangle<u32> dst_bounds_scaled(dst_bounds * m_resolution_scale);
glViewport(dst_bounds_scaled.left,
@ -1056,6 +1065,9 @@ void GPU_HW_OpenGL::UpdateVRAMReadTexture()
void GPU_HW_OpenGL::UpdateDepthBufferFromMaskBit()
{
if (m_pgxp_depth_buffer)
return;
glDisable(GL_SCISSOR_TEST);
glDisable(GL_BLEND);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
@ -1073,6 +1085,15 @@ void GPU_HW_OpenGL::UpdateDepthBufferFromMaskBit()
m_vram_read_texture.Bind();
}
void GPU_HW_OpenGL::ClearDepthBuffer()
{
glDisable(GL_SCISSOR_TEST);
IsGLES() ? glClearDepthf(1.0f) : glClearDepth(1.0f);
glClear(GL_DEPTH_BUFFER_BIT);
glEnable(GL_SCISSOR_TEST);
m_last_depth_z = 1.0f;
}
std::unique_ptr<GPU> GPU::CreateHardwareOpenGLRenderer()
{
return std::make_unique<GPU_HW_OpenGL>();