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Ilusha 2024-03-17 11:00:10 +03:00 • committed by Ilya Shurupov
parent f8c38a8a37
commit 2455f90550
19 changed files with 999 additions and 1890 deletions
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108
Sketch3D/private/FrameBuffer.cpp Normal file
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#include "FrameBuffer.hpp"
#include "GraphicsApi.hpp"
void glerr(GLenum type);
#define AssertGL(x) { x; GLenum __gle = glGetError(); if (__gle != GL_NO_ERROR) glerr(__gle); }
using namespace tp;
RenderBuffer::RenderBuffer(const Vec2F& size) :
mSize(size) {
mDrawBuffers[0] = {GL_COLOR_ATTACHMENT0};
// --------- texture ---------
AssertGL(glGenTextures(1, &mTextureId));
AssertGL(glBindTexture(GL_TEXTURE_2D, mTextureId));
// Give an empty image to OpenGL ( the last "0" )
AssertGL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)size.x, (GLsizei)size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0));
// Poor filtering. Needed
AssertGL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
AssertGL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
// --------- depth ---------
AssertGL(glGenRenderbuffers(1, &mDepthBufferID));
AssertGL(glBindRenderbuffer(GL_RENDERBUFFER, mDepthBufferID));
AssertGL(glRenderbufferStorage(GL_RENDERBUFFER, GLW_CONTEXT_DEPTH_COMPONENT, (GLsizei)size.x, (GLsizei)size.y));
// ------------ framebuffer ------------
AssertGL(glGenFramebuffers(1, &mFrameBufferID));
AssertGL(glBindFramebuffer(GL_FRAMEBUFFER, mFrameBufferID));
AssertGL(glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mDepthBufferID));
// Set "renderedTexture" as our colour attachement #0
AssertGL(glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, mTextureId, 0));
// Set the list of draw buffers.
AssertGL(glDrawBuffers(1, mDrawBuffers)); // "1" is the size of DrawBuffers
ASSERT(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
RenderBuffer::RenderBuffer(const Vec2F& size, tp::uint1 samples) :
mSize(size) {
mDrawBuffers[0] = { GL_COLOR_ATTACHMENT0 };
// ------- texture ---------
AssertGL(glGenTextures(1, &mTextureId));
AssertGL(glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, mTextureId));
#ifdef ENV_OS_ANDROID
AssertGL(glTexStorage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, samples, GL_RGBA, (GLsizei)size.x, (GLsizei)size.y, GL_TRUE));
#else
AssertGL(glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, samples, GL_RGBA, (GLsizei)size.x, (GLsizei)size.y, GL_TRUE));
#endif
// !?
//AssertGL(glTexParameteri(GL_TEXTURE_2D_MULTISAMPLE, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
//AssertGL(glTexParameteri(GL_TEXTURE_2D_MULTISAMPLE, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
// ------- depth -------
AssertGL(glGenRenderbuffers(1, &mDepthBufferID));
AssertGL(glBindRenderbuffer(GL_RENDERBUFFER, mDepthBufferID));
AssertGL(glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, GLW_CONTEXT_DEPTH_COMPONENT, (GLsizei)size.x, (GLsizei)size.y));
// ------- fbuff -------
AssertGL(glGenFramebuffers(1, &mFrameBufferID));
AssertGL(glBindFramebuffer(GL_FRAMEBUFFER, mFrameBufferID));
AssertGL(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D_MULTISAMPLE, mTextureId, 0));
AssertGL(glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, mDepthBufferID));
AssertGL(glDrawBuffers(1, mDrawBuffers));
ASSERT(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
uint4 RenderBuffer::buffId() const {
return mFrameBufferID;
}
void RenderBuffer::beginDraw() {
AssertGL(glBindFramebuffer(GL_FRAMEBUFFER, mFrameBufferID));
setViewport({ 0.f, 0.f, mSize.x, mSize.y });
}
void RenderBuffer::setViewport(const RectF& viewport) {
AssertGL(glViewport((GLsizei)viewport.x, (GLsizei)viewport.y, (GLsizei)viewport.z, (GLsizei)viewport.w));
}
void RenderBuffer::clear() {
AssertGL(glClearColor(mClearCol.r, mClearCol.g, mClearCol.b, mClearCol.a));
AssertGL(glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT));
}
void RenderBuffer::endDraw() {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glClearColor(0, 0, 0, 0);
glUseProgram(0);
}
RenderBuffer::~RenderBuffer() {
glDeleteFramebuffers(1, &mFrameBufferID);
glDeleteTextures(1, &mTextureId);
glDeleteRenderbuffers(1, &mDepthBufferID);
}
uint4 RenderBuffer::texId() const {
return mTextureId;
}
const Vec2F& RenderBuffer::getSize() const { return mSize; }