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melonDS
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don't double buffer 3D framebuffers for the GL Renderer 

looks like leftovers from when 3D+2D composition was done in the frontend
This commit is contained in:
RSDuck 2023-04-11 22:59:57 +02:00
parent b11b5bf522
commit d9c0834120
3 changed files with 41 additions and 60 deletions
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81
src/GPU3D_OpenGL.cpp
View File

@ -232,29 +232,26 @@ std::unique_ptr<GLRenderer> GLRenderer::New() noexcept
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, result->IndexBufferID);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(IndexBuffer), nullptr, GL_DYNAMIC_DRAW);
glGenFramebuffers(4, &result->FramebufferID[0]);
glBindFramebuffer(GL_FRAMEBUFFER, result->FramebufferID[0]);
glGenTextures(8, &result->FramebufferTex[0]);
result->FrontBuffer = 0;
glGenFramebuffers(1, &result->MainFramebuffer);
// color buffers
SetupDefaultTexParams(result->FramebufferTex[0]);
SetupDefaultTexParams(result->FramebufferTex[1]);
glGenTextures(1, &result->ColorBufferTex);
SetupDefaultTexParams(result->ColorBufferTex);
// depth/stencil buffer
SetupDefaultTexParams(result->FramebufferTex[4]);
SetupDefaultTexParams(result->FramebufferTex[6]);
glGenTextures(1, &result->DepthBufferTex);
SetupDefaultTexParams(result->DepthBufferTex);
// attribute buffer
// R: opaque polyID (for edgemarking)
// G: edge flag
// B: fog flag
SetupDefaultTexParams(result->FramebufferTex[5]);
SetupDefaultTexParams(result->FramebufferTex[7]);
glGenTextures(1, &result->AttrBufferTex);
SetupDefaultTexParams(result->AttrBufferTex);
// downscale framebuffer for display capture (always 256x192)
SetupDefaultTexParams(result->FramebufferTex[3]);
glGenTextures(1, &result->DownScaleBufferTex);
SetupDefaultTexParams(result->DownScaleBufferTex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 192, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glEnable(GL_BLEND);
@ -292,8 +289,12 @@ GLRenderer::~GLRenderer()
glDeleteTextures(1, &TexMemID);
glDeleteTextures(1, &TexPalMemID);
glDeleteFramebuffers(4, &FramebufferID[0]);
glDeleteTextures(8, &FramebufferTex[0]);
glDeleteFramebuffers(1, &MainFramebuffer);
glDeleteFramebuffers(1, &DownscaleFramebuffer);
glDeleteTextures(1, &ColorBufferTex);
glDeleteTextures(1, &DepthBufferTex);
glDeleteTextures(1, &AttrBufferTex);
glDeleteTextures(1, &DownScaleBufferTex);
glDeleteVertexArrays(1, &VertexArrayID);
glDeleteBuffers(1, &VertexBufferID);
@ -323,40 +324,25 @@ void GLRenderer::SetRenderSettings(GPU::RenderSettings& settings)
ScreenW = 256 * scale;
ScreenH = 192 * scale;
glBindTexture(GL_TEXTURE_2D, FramebufferTex[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, ScreenW, ScreenH, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glBindTexture(GL_TEXTURE_2D, FramebufferTex[1]);
glBindTexture(GL_TEXTURE_2D, ColorBufferTex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, ScreenW, ScreenH, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glBindTexture(GL_TEXTURE_2D, FramebufferTex[4]);
glBindTexture(GL_TEXTURE_2D, DepthBufferTex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, ScreenW, ScreenH, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL);
glBindTexture(GL_TEXTURE_2D, FramebufferTex[5]);
glBindTexture(GL_TEXTURE_2D, AttrBufferTex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, ScreenW, ScreenH, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glBindTexture(GL_TEXTURE_2D, FramebufferTex[6]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, ScreenW, ScreenH, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL);
glBindTexture(GL_TEXTURE_2D, FramebufferTex[7]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, ScreenW, ScreenH, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glBindFramebuffer(GL_FRAMEBUFFER, FramebufferID[3]);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FramebufferTex[3], 0);
glBindFramebuffer(GL_FRAMEBUFFER, DownscaleFramebuffer);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, DownScaleBufferTex, 0);
GLenum fbassign[2] = {GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1};
glBindFramebuffer(GL_FRAMEBUFFER, FramebufferID[0]);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FramebufferTex[0], 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, FramebufferTex[4], 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, FramebufferTex[5], 0);
glBindFramebuffer(GL_FRAMEBUFFER, MainFramebuffer);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, ColorBufferTex, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, DepthBufferTex, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, AttrBufferTex, 0);
glDrawBuffers(2, fbassign);
glBindFramebuffer(GL_FRAMEBUFFER, FramebufferID[1]);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FramebufferTex[1], 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, FramebufferTex[6], 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, FramebufferTex[7], 0);
glDrawBuffers(2, fbassign);
glBindFramebuffer(GL_FRAMEBUFFER, FramebufferID[0]);
glBindBuffer(GL_PIXEL_PACK_BUFFER, PixelbufferID);
glBufferData(GL_PIXEL_PACK_BUFFER, 256*192*4, NULL, GL_DYNAMIC_READ);
@ -1065,9 +1051,9 @@ void GLRenderer::RenderSceneChunk(int y, int h)
glStencilMask(0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, FramebufferTex[FrontBuffer ? 6 : 4]);
glBindTexture(GL_TEXTURE_2D, DepthBufferTex);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, FramebufferTex[FrontBuffer ? 7 : 5]);
glBindTexture(GL_TEXTURE_2D, AttrBufferTex);
glBindBuffer(GL_ARRAY_BUFFER, ClearVertexBufferID);
glBindVertexArray(ClearVertexArrayID);
@ -1116,7 +1102,7 @@ void GLRenderer::RenderFrame()
CurShaderID = -1;
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, FramebufferID[FrontBuffer]);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, MainFramebuffer);
ShaderConfig.uScreenSize[0] = ScreenW;
ShaderConfig.uScreenSize[1] = ScreenH;
@ -1282,22 +1268,17 @@ void GLRenderer::RenderFrame()
RenderSceneChunk(0, 192);
}
FrontBuffer = FrontBuffer ? 0 : 1;
}
void GLRenderer::PrepareCaptureFrame()
{
// TODO: make sure this picks the right buffer when doing antialiasing
int original_fb = FrontBuffer^1;
glBindFramebuffer(GL_READ_FRAMEBUFFER, FramebufferID[original_fb]);
glBindFramebuffer(GL_READ_FRAMEBUFFER, MainFramebuffer);
glReadBuffer(GL_COLOR_ATTACHMENT0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, FramebufferID[3]);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, DownscaleFramebuffer);
glDrawBuffer(GL_COLOR_ATTACHMENT0);
glBlitFramebuffer(0, 0, ScreenW, ScreenH, 0, 0, 256, 192, GL_COLOR_BUFFER_BIT, GL_NEAREST);
glBindFramebuffer(GL_READ_FRAMEBUFFER, FramebufferID[3]);
glBindFramebuffer(GL_READ_FRAMEBUFFER, DownscaleFramebuffer);
glReadPixels(0, 0, 256, 192, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
}
@ -1326,7 +1307,7 @@ u32* GLRenderer::GetLine(int line)
void GLRenderer::SetupAccelFrame()
{
glBindTexture(GL_TEXTURE_2D, FramebufferTex[FrontBuffer]);
glBindTexture(GL_TEXTURE_2D, ColorBufferTex);
}
}

10
src/GPU3D_OpenGL.h
View File

@ -143,11 +143,11 @@ private:
bool BetterPolygons {};
int ScreenW {}, ScreenH {};
GLuint FramebufferTex[8] {};
int FrontBuffer {};
GLuint FramebufferID[4] {}, PixelbufferID {};
GLuint ColorBufferTex {}, DepthBufferTex {}, AttrBufferTex {};
GLuint DownScaleBufferTex {};
GLuint PixelbufferID {};
GLuint MainFramebuffer {}, DownscaleFramebuffer {};
u32 Framebuffer[256*192] {};
};
}

10
src/GPU_OpenGL.cpp
View File

@ -181,9 +181,9 @@ void GLCompositor::Stop()
void GLCompositor::RenderFrame()
{
int frontbuf = GPU::FrontBuffer;
int backbuf = GPU::FrontBuffer ^ 1;
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, CompScreenOutputFB[frontbuf]);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, CompScreenOutputFB[backbuf]);
glDisable(GL_DEPTH_TEST);
glDisable(GL_STENCIL_TEST);
@ -204,12 +204,12 @@ void GLCompositor::RenderFrame()
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, CompScreenInputTex);
if (GPU::Framebuffer[frontbuf][0] && GPU::Framebuffer[frontbuf][1])
if (GPU::Framebuffer[backbuf][0] && GPU::Framebuffer[backbuf][1])
{
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 256*3 + 1, 192, GL_RGBA_INTEGER,
GL_UNSIGNED_BYTE, GPU::Framebuffer[frontbuf][0]);
GL_UNSIGNED_BYTE, GPU::Framebuffer[backbuf][0]);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 192, 256*3 + 1, 192, GL_RGBA_INTEGER,
GL_UNSIGNED_BYTE, GPU::Framebuffer[frontbuf][1]);
GL_UNSIGNED_BYTE, GPU::Framebuffer[backbuf][1]);
}
glActiveTexture(GL_TEXTURE1);