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Added new rendertexture class for FBO's.

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This commit is contained in:
Justin Marshall
2020-07-11 19:35:18 -07:00
parent 3185e48ccd
commit 98ff70f6ef
8 changed files with 193 additions and 4 deletions
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code/redalert/rendertexture.cpp
+136
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@@ -0,0 +1,136 @@
// RenderTexture.cpp
//
#include "function.h"
#include "image.h"
#include "gl/glew.h"
/*
========================
RenderTexture::RenderTexture
========================
*/
RenderTexture::RenderTexture(Image_t *colorImage, Image_t *depthImage) {
deviceHandle = -1;
if (colorImage != nullptr)
{
AddRenderImage(colorImage);
}
this->depthImage = depthImage;
}
/*
========================
RenderTexture::~RenderTexture
========================
*/
RenderTexture::~RenderTexture() {
if (deviceHandle != -1)
{
glDeleteFramebuffers(1, &deviceHandle);
deviceHandle = -1;
}
}
/*
================
RenderTexture::AddRenderImage
================
*/
void RenderTexture::AddRenderImage(Image_t *image) {
if (deviceHandle != -1) {
assert(!"RenderTexture::AddRenderImage: Can't add render image after FBO has been created!");
}
colorImages.push_back(image);
}
/*
================
RenderTexture::InitRenderTexture
================
*/
void RenderTexture::InitRenderTexture(void) {
glGenFramebuffers(1, &deviceHandle);
glBindFramebuffer(GL_FRAMEBUFFER, deviceHandle);
for (int i = 0; i < colorImages.size(); i++) {
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, colorImages[i]->HouseImages[0].image[0][0], 0);
}
if (depthImage != nullptr) {
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthImage->HouseImages[0].image[0][0], 0);
}
if (colorImages.size() > 0)
{
GLenum DrawBuffers[5] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2, GL_COLOR_ATTACHMENT3, GL_COLOR_ATTACHMENT4 };
if (colorImages.size() >= 5) {
assert(!"InitRenderTextures: Too many render targets!");
}
glDrawBuffers(colorImages.size(), &DrawBuffers[0]);
}
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
assert(!"RenderTexture::InitRenderTexture: Failed to create rendertexture!");
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
/*
================
RenderTexture::MakeCurrent
================
*/
void RenderTexture::MakeCurrent(void) {
glBindFramebuffer(GL_FRAMEBUFFER, deviceHandle);
}
/*
================
RenderTexture::BindNull
================
*/
void RenderTexture::BindNull(void) {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
int RenderTexture::GetWidth() const { return (colorImages.size() > 0) ? colorImages[0]->renderwidth[0] : depthImage->renderwidth[0]; }
int RenderTexture::GetHeight() const { return (colorImages.size() > 0) ? colorImages[0]->renderheight[0] : depthImage->renderheight[0]; }
/*
================
RenderTexture::Resize
================
*/
void RenderTexture::Resize(int width, int height) {
//Image_t *target = nullptr;
//
//if (colorImages.Num() > 0) {
// target = colorImages[0];
//}
//else {
// target = depthImage;
//}
//
//if (target->GetOpts().width == width && target->GetOpts().height == height) {
// return;
//}
//
//for(int i = 0; i < colorImages.Num(); i++) {
// colorImages[i]->Resize(width, height);
//}
//
//if (depthImage != nullptr) {
// depthImage->Resize(width, height);
//}
//
//if (deviceHandle != -1)
//{
// glDeleteFramebuffers(1, &deviceHandle);
// deviceHandle = -1;
//}
//
//InitRenderTexture();
}