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GPU/OpenGL: Support MSAA without texel/SSBO buffers

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This commit is contained in:
Connor McLaughlin 2021-04-06 02:55:00 +10:00
parent 0e637a093a
commit 4ed12bcb52
2 changed files with 25 additions and 27 deletions
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46
src/core/gpu_hw_opengl.cpp
View file

@ -369,10 +369,7 @@ void GPU_HW_OpenGL::SetCapabilities(HostDisplay* host_display)
}
else
{
Log_WarningPrintf("Texture buffers and SSBOs are not supported, VRAM writes will be slower and multisampling "
"will be unavailable.");
m_max_multisamples = 1;
m_supports_per_sample_shading = false;
Log_WarningPrintf("Texture buffers and SSBOs are not supported, VRAM writes will be slower.");
}
}
@ -1158,21 +1155,20 @@ void GPU_HW_OpenGL::UpdateVRAM(u32 x, u32 y, u32 width, u32 height, const void*
m_texture_stream_buffer->Unmap(num_pixels * sizeof(u32));
m_texture_stream_buffer->Bind();
// have to write to the 1x texture first
if (m_resolution_scale > 1)
m_vram_encoding_texture.Bind();
else
m_vram_texture.Bind();
// lower-left origin flip happens here
const u32 flipped_y = VRAM_HEIGHT - y - height;
// have to write to the 1x texture first
GL::Texture& dst_texture =
(m_resolution_scale > 1 || m_multisamples > 1) ? m_vram_encoding_texture : m_vram_texture;
// update texture data
glTexSubImage2D(m_vram_texture.GetGLTarget(), 0, x, flipped_y, width, height, GL_RGBA, GL_UNSIGNED_BYTE,
dst_texture.Bind();
glTexSubImage2D(dst_texture.GetGLTarget(), 0, x, flipped_y, width, height, GL_RGBA, GL_UNSIGNED_BYTE,
reinterpret_cast<void*>(static_cast<uintptr_t>(map_result.buffer_offset)));
m_texture_stream_buffer->Unbind();
if (m_resolution_scale > 1)
if (&dst_texture != &m_vram_texture)
{
// scale to internal resolution
const u32 scaled_width = width * m_resolution_scale;
@ -1181,8 +1177,8 @@ void GPU_HW_OpenGL::UpdateVRAM(u32 x, u32 y, u32 width, u32 height, const void*
const u32 scaled_y = y * m_resolution_scale;
const u32 scaled_flipped_y = m_vram_texture.GetHeight() - scaled_y - scaled_height;
BlitTexture(m_vram_encoding_texture, x, flipped_y, width, height, scaled_x, scaled_flipped_y, scaled_width,
scaled_height);
BlitTextureToFramebuffer(dst_texture, x, flipped_y, width, height, scaled_x, scaled_flipped_y, scaled_width,
scaled_height);
}
RestoreGraphicsAPIState();
@ -1260,25 +1256,26 @@ void GPU_HW_OpenGL::CopyVRAM(u32 src_x, u32 src_y, u32 dst_x, u32 dst_y, u32 wid
if (src_dirty)
UpdateVRAMReadTexture();
CopyTexture(m_vram_texture, m_vram_fbo_id, m_vram_read_texture, src_x, src_y, dst_x, dst_y, width, height);
CopyTexture(m_vram_texture, m_vram_fbo_id, m_vram_read_texture, m_vram_read_texture.GetGLFramebufferID(), src_x,
src_y, dst_x, dst_y, width, height);
}
IncludeVRAMDirtyRectangle(dst_bounds);
}
void GPU_HW_OpenGL::CopyTexture(GL::Texture& dest, GLuint dest_fbo, GL::Texture& src, u32 src_x, u32 src_y, u32 dst_x,
u32 dst_y, u32 width, u32 height)
void GPU_HW_OpenGL::CopyTexture(GL::Texture& dest, GLuint dest_fbo, GL::Texture& src, GLuint src_fbo, u32 src_x,
u32 src_y, u32 dst_x, u32 dst_y, u32 width, u32 height)
{
if (src.IsMultisampled())
{
// The MSAA case still needs framebuffer blits.
dest.BindFramebuffer(GL_DRAW_FRAMEBUFFER);
glBindFramebuffer(GL_READ_FRAMEBUFFER, dest_fbo);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dest_fbo);
glBindFramebuffer(GL_READ_FRAMEBUFFER, src_fbo);
glDisable(GL_SCISSOR_TEST);
glBlitFramebuffer(src_x, src_y, src_x + width, src_y + height, dst_x, dst_y, dst_x + width, dst_y + height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
glEnable(GL_SCISSOR_TEST);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dest_fbo);
RestoreGraphicsAPIState();
return;
}
@ -1300,13 +1297,13 @@ void GPU_HW_OpenGL::CopyTexture(GL::Texture& dest, GLuint dest_fbo, GL::Texture&
else
{
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dest_fbo);
BlitTexture(src, src_x, src_y, width, height, dst_x, dst_y, width, height);
BlitTextureToFramebuffer(src, src_x, src_y, width, height, dst_x, dst_y, width, height);
RestoreGraphicsAPIState();
}
}
void GPU_HW_OpenGL::BlitTexture(GL::Texture& src, u32 src_x, u32 src_y, u32 src_width, u32 src_height, u32 dst_x,
u32 dst_y, u32 dst_width, u32 dst_height)
void GPU_HW_OpenGL::BlitTextureToFramebuffer(GL::Texture& src, u32 src_x, u32 src_y, u32 src_width, u32 src_height,
u32 dst_x, u32 dst_y, u32 dst_width, u32 dst_height)
{
// But a copy shader is probably better on mobile drivers.
const float uniforms[4] = {
@ -1336,7 +1333,8 @@ void GPU_HW_OpenGL::UpdateVRAMReadTexture()
const u32 x = scaled_rect.left;
const u32 y = m_vram_texture.GetHeight() - scaled_rect.top - height;
CopyTexture(m_vram_read_texture, m_vram_read_texture.GetGLFramebufferID(), m_vram_texture, x, y, x, y, width, height);
CopyTexture(m_vram_read_texture, m_vram_read_texture.GetGLFramebufferID(), m_vram_texture, m_vram_fbo_id, x, y, x, y,
width, height);
GPU_HW::UpdateVRAMReadTexture();
}

6
src/core/gpu_hw_opengl.h
View file

@ -76,9 +76,9 @@ private:
bool BlitVRAMReplacementTexture(const TextureReplacementTexture* tex, u32 dst_x, u32 dst_y, u32 width, u32 height);
void DownsampleFramebuffer(GL::Texture& source, u32 left, u32 top, u32 width, u32 height);
void DownsampleFramebufferBoxFilter(GL::Texture& source, u32 left, u32 top, u32 width, u32 height);
void CopyTexture(GL::Texture& dest, GLuint dest_fbo, GL::Texture& src, u32 src_x, u32 src_y, u32 dst_x, u32 dst_y,
u32 width, u32 height);
void BlitTexture(GL::Texture& src, u32 src_x, u32 src_y, u32 src_width, u32 src_height, u32 dst_x, u32 dst_y,
void CopyTexture(GL::Texture& dest, GLuint dest_fbo, GL::Texture& src, GLuint src_fbo, u32 src_x, u32 src_y,
u32 dst_x, u32 dst_y, u32 width, u32 height);
void BlitTextureToFramebuffer(GL::Texture& src, u32 src_x, u32 src_y, u32 src_width, u32 src_height, u32 dst_x, u32 dst_y,
u32 dst_width, u32 dst_height);
// downsample texture - used for readbacks at >1xIR.