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Added GL backbuffer MSAA.

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This commit is contained in:
bkaradzic 2013-02-20 22:13:32 -08:00
parent 39e53d11db
commit 936c2b5737
1 changed files with 88 additions and 15 deletions
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103
src/renderer_gl.cpp
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@ -168,6 +168,7 @@ namespace bgfx
, m_postSwapBuffers(NULL)
, m_hash( (BX_PLATFORM_WINDOWS<<1) | BX_ARCH_64BIT)
, m_rtMsaa(false)
, m_backBufferFbo(0)
{
m_rt.idx = invalidHandle;
memset(&m_resolution, 0, sizeof(m_resolution) );
@ -185,6 +186,7 @@ namespace bgfx
m_resolution = _resolution;
uint32_t msaa = 1<<( (m_resolution.m_flags&BGFX_RESET_MSAA_MASK)>>BGFX_RESET_MSAA_SHIFT);
msaa = uint32_min(m_maxMsaa, msaa == 0 ? 0 : 1<<msaa);
setRenderContextSize(_resolution.m_width, _resolution.m_height, msaa);
updateCapture();
}
@ -205,7 +207,7 @@ namespace bgfx
if (_rt.idx == invalidHandle)
{
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0) );
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, m_backBufferFbo) );
}
else
{
@ -220,6 +222,69 @@ namespace bgfx
return _height;
}
void createMsaaFbo(uint32_t _width, uint32_t _height, uint32_t _msaa)
{
#if BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
if (1 < _msaa)
{
GL_CHECK(glGenFramebuffers(1, &m_backBufferFbo) );
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, m_backBufferFbo) );
GL_CHECK(glGenRenderbuffers(3, m_backBufferRbos) );
GL_CHECK(glBindRenderbuffer(GL_RENDERBUFFER, m_backBufferRbos[0]) );
GL_CHECK(glRenderbufferStorageMultisample(GL_RENDERBUFFER, _msaa, GL_RGBA8, _width, _height) );
GL_CHECK(glBindRenderbuffer(GL_RENDERBUFFER, m_backBufferRbos[1]) );
GL_CHECK(glRenderbufferStorageMultisample(GL_RENDERBUFFER, _msaa, GL_DEPTH24_STENCIL8, _width, _height) );
GL_CHECK(glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, m_backBufferRbos[0]) );
GL_CHECK(glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, m_backBufferRbos[1]) );
BX_CHECK(GL_FRAMEBUFFER_COMPLETE == glCheckFramebufferStatus(GL_FRAMEBUFFER)
, "glCheckFramebufferStatus failed 0x%08x"
, glCheckFramebufferStatus(GL_FRAMEBUFFER)
);
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, m_backBufferFbo) );
}
#endif // BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
}
void destroyMsaaFbo()
{
#if BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
if (0 != m_backBufferFbo)
{
GL_CHECK(glDeleteFramebuffers(1, &m_backBufferFbo) );
GL_CHECK(glDeleteRenderbuffers(3, m_backBufferRbos) );
m_backBufferFbo = 0;
}
#endif // BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
}
void blitMsaaFbo()
{
#if BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
if (0 != m_backBufferFbo)
{
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0) );
GL_CHECK(glBindFramebuffer(GL_READ_FRAMEBUFFER, m_backBufferFbo) );
GL_CHECK(glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0) );
uint32_t width = m_resolution.m_width;
uint32_t height = m_resolution.m_height;
GL_CHECK(glBlitFramebuffer(0
, 0
, width
, height
, 0
, 0
, width
, height
, GL_COLOR_BUFFER_BIT
, GL_LINEAR
) );
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0) );
}
#endif // BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
}
void setRenderContextSize(uint32_t _width, uint32_t _height, uint32_t _msaa = 0)
{
if (_width != 0
@ -227,11 +292,15 @@ namespace bgfx
{
if (!m_glctx.isValid() )
{
m_glctx.create(_width, _height/*, _msaa*/);
m_glctx.create(_width, _height);
}
else
{
m_glctx.resize(_width, _height/*, _msaa*/);
destroyMsaaFbo();
m_glctx.resize(_width, _height);
createMsaaFbo(_width, _height, _msaa);
}
}
@ -381,6 +450,8 @@ namespace bgfx
PostSwapBuffersFn m_postSwapBuffers;
uint64_t m_hash;
GLuint m_backBufferFbo;
GLuint m_backBufferRbos[2];
GlContext m_glctx;
};
@ -1535,7 +1606,7 @@ namespace bgfx
}
#endif //
#if BGFX_CONFIG_RENDERER_OPENGL || BGFX_CONFIG_RENDERER_OPENGLES3
#if BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
if (0 < colorFormat
&& 0 != m_msaa)
{
@ -1557,7 +1628,7 @@ namespace bgfx
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, m_fbo[1]) );
}
else
#endif // BGFX_CONFIG_RENDERER_OPENGL || BGFX_CONFIG_RENDERER_OPENGLES3
#endif // BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
{
GL_CHECK(glGenFramebuffers(1, m_fbo) );
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, m_fbo[0]) );
@ -1594,13 +1665,13 @@ namespace bgfx
BX_CHECK(0 != m_depthRbo, "Failed to generate renderbuffer id.");
GL_CHECK(glBindRenderbuffer(GL_RENDERBUFFER, m_depthRbo) );
#if BGFX_CONFIG_RENDERER_OPENGL || BGFX_CONFIG_RENDERER_OPENGLES3
#if BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
if (0 != m_msaa)
{
GL_CHECK(glRenderbufferStorageMultisample(GL_RENDERBUFFER, m_msaa, depthComponent, _width, _height) );
}
else
#endif // BGFX_CONFIG_RENDERER_OPENGL || BGFX_CONFIG_RENDERER_OPENGLES3
#endif // BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
{
GL_CHECK(glRenderbufferStorage(GL_RENDERBUFFER, depthComponent, _width, _height) );
}
@ -1628,7 +1699,7 @@ namespace bgfx
);
}
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0) );
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, s_renderCtx.m_backBufferFbo) );
}
void RenderTarget::destroy()
@ -1654,7 +1725,7 @@ namespace bgfx
void RenderTarget::resolve()
{
#if BGFX_CONFIG_RENDERER_OPENGL || BGFX_CONFIG_RENDERER_OPENGLES3
#if BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
BX_CHECK(0 != m_fbo[1], "Can resolve without two framebuffers.");
GL_CHECK(glBindFramebuffer(GL_READ_FRAMEBUFFER, m_fbo[0]) );
@ -1670,8 +1741,8 @@ namespace bgfx
, GL_COLOR_BUFFER_BIT
, GL_LINEAR
) );
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0) );
#endif // BGFX_CONFIG_RENDERER_OPENGL || BGFX_CONFIG_RENDERER_OPENGLES3
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, s_renderCtx.m_backBufferFbo) );
#endif // BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
}
void ConstantBuffer::commit()
@ -1958,12 +2029,12 @@ namespace bgfx
glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &s_renderCtx.m_maxAnisotropy);
}
#if BGFX_CONFIG_RENDERER_OPENGL || BGFX_CONFIG_RENDERER_OPENGLES3
#if BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
if (s_extension[Extension::ARB_texture_multisample].m_supported)
{
glGetIntegerv(GL_MAX_COLOR_TEXTURE_SAMPLES, &s_renderCtx.m_maxMsaa);
glGetIntegerv(GL_MAX_SAMPLES, &s_renderCtx.m_maxMsaa);
}
#endif // BGFX_CONFIG_RENDERER_OPENGL || BGFX_CONFIG_RENDERER_OPENGLES3
#endif // BGFX_CONFIG_RENDERER_OPENGL|BGFX_CONFIG_RENDERER_OPENGLES3
if (s_extension[Extension::EXT_texture_format_BGRA8888].m_supported
|| s_extension[Extension::EXT_bgra].m_supported)
@ -2158,7 +2229,7 @@ namespace bgfx
GL_CHECK(glBindVertexArray(0) );
}
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0) );
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, s_renderCtx.m_backBufferFbo) );
s_renderCtx.updateResolution(m_render->m_resolution);
@ -2883,6 +2954,8 @@ namespace bgfx
}
}
s_renderCtx.blitMsaaFbo();
int64_t now = bx::getHPCounter();
elapsed += now;