gpesquero/organicmaps
1
Fork 0
forked from organicmaps/organicmaps
Code Pull requests Activity

added glDiscardFramebufferFn OpenGL function.

Browse source
This commit is contained in:
rachytski 2012-11-05 18:47:44 +03:00 • committed by Alex Zolotarev
parent 85e1093729
commit 6d7ed36628
5 changed files with 43 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
yg/internal/opengl.cpp
View file

@ -92,6 +92,7 @@ namespace yg
void (OPENGL_CALLING_CONVENTION * glGenFramebuffersFn) (GLsizei n, GLuint *framebuffers);
void (OPENGL_CALLING_CONVENTION * glDeleteFramebuffersFn) (GLsizei n, const GLuint *framebuffers);
GLenum (OPENGL_CALLING_CONVENTION * glCheckFramebufferStatusFn) (GLenum target);
void (OPENGL_CALLING_CONVENTION * glDiscardFramebufferFn)(GLenum target, GLsizei numAttachments, GLenum const * attachements) = 0;
void (OPENGL_CALLING_CONVENTION * glGenRenderbuffersFn) (GLsizei n, GLuint *renderbuffers);
void (OPENGL_CALLING_CONVENTION * glDeleteRenderbuffersFn) (GLsizei n, const GLuint *renderbuffers);

1
yg/internal/opengl.hpp
View file

@ -127,6 +127,7 @@ namespace yg
extern void (OPENGL_CALLING_CONVENTION * glGenFramebuffersFn) (GLsizei n, GLuint *framebuffers);
extern void (OPENGL_CALLING_CONVENTION * glDeleteFramebuffersFn) (GLsizei n, const GLuint *framebuffers);
extern GLenum (OPENGL_CALLING_CONVENTION * glCheckFramebufferStatusFn) (GLenum target);
extern void (OPENGL_CALLING_CONVENTION * glDiscardFramebufferFn)(GLenum target, GLsizei numAttachments, GLenum const * attachements);
// renderbuffer extensions

1
yg/internal/opengl_glsl_es2.cpp
View file

@ -74,6 +74,7 @@ namespace yg
glGenFramebuffersFn = &glGenFramebuffers;
glDeleteFramebuffersFn = &glDeleteFramebuffers;
glCheckFramebufferStatusFn = &glCheckFramebufferStatus;
glDiscardFramebufferFn = &glDiscardFramebufferEXT;
g_isRenderbufferSupported = g_isFramebufferSupported;

30
yg/renderer.cpp
View file

@ -84,6 +84,36 @@ namespace yg
processCommand(make_shared_ptr(new UnbindRenderTarget(m_renderTarget)));
}
Renderer::DiscardFramebuffer::DiscardFramebuffer(bool doDiscardColor, bool doDiscardDepth)
: m_doDiscardColor(doDiscardColor), m_doDiscardDepth(doDiscardDepth)
{}
void Renderer::DiscardFramebuffer::perform()
{
static bool firstReport = true;
if (firstReport && !glDiscardFramebufferFn)
LOG(LINFO, ("GL_EXT_discard_framebuffer is unsupported"));
firstReport = false;
if (glDiscardFramebufferFn)
{
GLenum attachements[2];
int numAttachements = 0;
if (m_doDiscardColor)
attachements[numAttachements++] = GL_COLOR_ATTACHMENT0_MWM;
if (m_doDiscardDepth)
attachements[numAttachements++] = GL_DEPTH_ATTACHMENT_MWM;
glDiscardFramebufferFn(GL_FRAMEBUFFER_MWM, numAttachements, attachements);
}
}
void Renderer::discardFramebuffer(bool doDiscardColor, bool doDiscardDepth)
{
processCommand(make_shared_ptr(new DiscardFramebuffer(doDiscardColor, doDiscardDepth)));
}
void Renderer::endFrame()
{
if (m_doUnbindRT && m_renderTarget)

10
yg/renderer.hpp
View file

@ -66,6 +66,14 @@ namespace yg
void perform();
};
struct DiscardFramebuffer : Command
{
bool m_doDiscardColor;
bool m_doDiscardDepth;
DiscardFramebuffer(bool doDiscardColor, bool doDiscardDepth);
void perform();
};
struct FinishCommand : Command
{
void perform();
@ -130,6 +138,8 @@ namespace yg
shared_ptr<RenderBuffer> const & depthBuffer() const;
void resetDepthBuffer();
void discardFramebuffer(bool doDiscardColor, bool doDiscardDepth);
/// @param clearRT - should we clear the renderTarget data (visible pixels)?
/// @param clearDepth - should we clear depthBuffer data?
/// @warning this function respects the clipping rect set and enabled(!)