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minor changes and functions added to read pixels back in framebuffer.

This commit is contained in:
Marco Di Benedetto 2012-05-08 16:46:59 +00:00
parent 2131d6a681
commit 754ba0c94f
1 changed files with 95 additions and 10 deletions
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105
wrap/glw/framebuffer.h
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@ -6,6 +6,7 @@
#include <vector>
#include <map>
#include <set>
namespace glw
{
@ -43,6 +44,11 @@ class RenderTarget
this->layer = -1;
this->face = GL_NONE;
}
bool isNull(void) const
{
return this->target.isNull();
}
};
typedef std::vector<RenderTarget> RenderTargetVector;
@ -239,6 +245,49 @@ class Framebuffer : public Object
return true;
}
bool readColorPixels(GLenum target, GLint unit, GLint index, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid * data)
{
(void)target;
(void)unit;
GLW_ASSERT(this->isValid());
if (this->m_config.colorTargets.bindings.count(index) <= 0)
{
GLW_ASSERT(0);
return false;
}
glReadBuffer(GL_COLOR_ATTACHMENT0 + index);
glReadPixels(x, y, width, height, format, type, data);
return true;
}
bool readDepthPixels(GLenum target, GLint unit, GLint x, GLint y, GLsizei width, GLsizei height, GLenum type, GLvoid * data)
{
(void)target;
(void)unit;
GLW_ASSERT(this->isValid());
if (this->m_config.depthTarget.isNull())
{
GLW_ASSERT(0);
return false;
}
glReadPixels(x, y, width, height, GL_DEPTH_COMPONENT, type, data);
return true;
}
bool readStencilPixels(GLenum target, GLint unit, GLint x, GLint y, GLsizei width, GLsizei height, GLenum type, GLvoid * data)
{
(void)target;
(void)unit;
GLW_ASSERT(this->isValid());
if (this->m_config.stencilTarget.isNull())
{
GLW_ASSERT(0);
return false;
}
glReadPixels(x, y, width, height, GL_STENCIL_INDEX, type, data);
return true;
}
protected:
Framebuffer(Context * ctx)
@ -251,8 +300,6 @@ class Framebuffer : public Object
{
this->destroy();
this->m_config = args;
GLint boundNameDraw = 0;
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &boundNameDraw);
@ -261,7 +308,7 @@ class Framebuffer : public Object
glGenFramebuffers(1, &(this->m_name));
glBindFramebuffer(GL_FRAMEBUFFER, this->m_name);
this->configure(GL_FRAMEBUFFER);
this->configure(GL_FRAMEBUFFER, args);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, boundNameDraw);
@ -285,15 +332,22 @@ class Framebuffer : public Object
FramebufferArguments m_config;
void configure(GLenum target)
void configure(GLenum target, const FramebufferArguments & args)
{
for (RenderTargetMapping::Iterator it=this->m_config.colorTargets.bindings.begin(); it!=this->m_config.colorTargets.bindings.end(); ++it)
this->m_config.clear();
for (RenderTargetMapping::ConstIterator it=args.colorTargets.bindings.begin(); it!=args.colorTargets.bindings.end(); ++it)
{
this->attachTarget(target, GL_COLOR_ATTACHMENT0 + it->first, it->second);
const bool colorAttached = this->attachTarget(target, GL_COLOR_ATTACHMENT0 + it->first, it->second);
if (!colorAttached) continue;
this->m_config.colorTargets[it->first] = it->second;
}
this->attachTarget(target, GL_DEPTH_ATTACHMENT, this->m_config.depthTarget );
this->attachTarget(target, GL_STENCIL_ATTACHMENT, this->m_config.stencilTarget);
const bool depthAttached = this->attachTarget(target, GL_DEPTH_ATTACHMENT, args.depthTarget);
if (depthAttached) this->m_config.depthTarget = args.depthTarget;
const bool stencilAttached = this->attachTarget(target, GL_STENCIL_ATTACHMENT, args.stencilTarget);
if (stencilAttached) this->m_config.stencilTarget = args.stencilTarget;
if (this->m_config.colorTargets.bindings.empty())
{
@ -303,8 +357,8 @@ class Framebuffer : public Object
else
{
std::vector<GLenum> drawBuffers;
drawBuffers.reserve(this->m_config.targetInputs.bindings.size());
for (RenderTargetBinding::Iterator it=this->m_config.targetInputs.bindings.begin(); it!=this->m_config.targetInputs.bindings.end(); ++it)
drawBuffers.reserve(args.targetInputs.bindings.size());
for (RenderTargetBinding::ConstIterator it=args.targetInputs.bindings.begin(); it!=args.targetInputs.bindings.end(); ++it)
{
const GLuint fragOutput = it->second;
const GLuint attachmentIndex = GL_COLOR_ATTACHMENT0 + it->first;
@ -313,6 +367,7 @@ class Framebuffer : public Object
drawBuffers.resize(size_t(fragOutput + 1), GL_NONE);
}
drawBuffers[fragOutput] = attachmentIndex;
this->m_config.targetInputs[it->first] = fragOutput;
}
glDrawBuffers(GLsizei(drawBuffers.size()), &(drawBuffers[0]));
glReadBuffer(drawBuffers[0]);
@ -531,6 +586,21 @@ class BoundReadFramebuffer : public BoundFramebuffer
;
}
bool readColorPixels(GLint index, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid * data)
{
return this->object()->readColorPixels(this->m_target, this->m_unit, index, x, y, width, height, format, type, data);
}
bool readDepthPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum type, GLvoid * data)
{
return this->object()->readDepthPixels(this->m_target, this->m_unit, x, y, width, height, type, data);
}
bool readStencilPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum type, GLvoid * data)
{
return this->object()->readStencilPixels(this->m_target, this->m_unit, x, y, width, height, type, data);
}
protected:
BoundReadFramebuffer(const FramebufferHandle & handle, const ReadFramebufferBindingParams & params)
@ -617,6 +687,21 @@ class BoundReadDrawFramebuffer : public BoundFramebuffer
;
}
bool readColorPixels(GLint index, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid * data)
{
return this->object()->readColorPixels(this->m_target, this->m_unit, index, x, y, width, height, format, type, data);
}
bool readDepthPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum type, GLvoid * data)
{
return this->object()->readDepthPixels(this->m_target, this->m_unit, x, y, width, height, type, data);
}
bool readStencilPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum type, GLvoid * data)
{
return this->object()->readStencilPixels(this->m_target, this->m_unit, x, y, width, height, type, data);
}
protected:
BoundReadDrawFramebuffer(const FramebufferHandle & handle, const ReadDrawFramebufferBindingParams & params)