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feat: deferred lighting (WIP)

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This commit is contained in:
MihailRis
2025-06-14 22:43:18 +03:00
parent 2ad076bec3
commit e849d5e9b7
10 changed files with 105 additions and 12 deletions
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src/graphics/core/GBuffer.cpp
+56 -1
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@@ -84,6 +84,26 @@ void GBuffer::createDepthBuffer() {
);
}
void GBuffer::createSSAOBuffer() {
glGenTextures(1, &ssaoBuffer);
glBindTexture(GL_TEXTURE_2D, ssaoBuffer);
glTexImage2D(
GL_TEXTURE_2D,
0,
GL_R16F,
width,
height,
0,
GL_RED,
GL_FLOAT,
nullptr
);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
GBuffer::GBuffer(uint width, uint height) : width(width), height(height) {
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
@@ -100,7 +120,20 @@ GBuffer::GBuffer(uint width, uint height) : width(width), height(height) {
createDepthBuffer();
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
logger.error() << "framebuffer is not complete!";
logger.error() << "gbuffer is not complete!";
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glGenFramebuffers(1, &ssaoFbo);
glBindFramebuffer(GL_FRAMEBUFFER, ssaoFbo);
createSSAOBuffer();
glFramebufferTexture2D(
GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, ssaoBuffer, 0
);
GLenum ssaoAttachments[1] = {GL_COLOR_ATTACHMENT0};
glDrawBuffers(1, ssaoAttachments);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
logger.error() << "SSAO framebuffer is not complete!";
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
@@ -109,8 +142,10 @@ GBuffer::~GBuffer() {
glDeleteTextures(1, &colorBuffer);
glDeleteTextures(1, &positionsBuffer);
glDeleteTextures(1, &normalsBuffer);
glDeleteTextures(1, &ssaoBuffer);
glDeleteRenderbuffers(1, &depthBuffer);
glDeleteFramebuffers(1, &fbo);
glDeleteFramebuffers(1, &ssaoFbo);
}
void GBuffer::bind() {
@@ -118,6 +153,11 @@ void GBuffer::bind() {
glClear(GL_COLOR_BUFFER_BIT);
}
void GBuffer::bindSSAO() const {
glBindFramebuffer(GL_FRAMEBUFFER, ssaoFbo);
glClear(GL_COLOR_BUFFER_BIT);
}
void GBuffer::unbind() {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
@@ -133,6 +173,10 @@ void GBuffer::bindBuffers() const {
glBindTexture(GL_TEXTURE_2D, colorBuffer);
}
void GBuffer::bindSSAOBuffer() const {
glBindTexture(GL_TEXTURE_2D, ssaoBuffer);
}
void GBuffer::resize(uint width, uint height) {
if (this->width == width && this->height == height) {
return;
@@ -180,6 +224,17 @@ void GBuffer::resize(uint width, uint height) {
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindFramebuffer(GL_FRAMEBUFFER, ssaoFbo);
glBindTexture(GL_TEXTURE_2D, ssaoBuffer);
glTexImage2D(
GL_TEXTURE_2D, 0, GL_R16F, width, height, 0, GL_RED, GL_FLOAT, nullptr
);
glFramebufferTexture2D(
GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, ssaoBuffer, 0
);
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
std::unique_ptr<ImageData> GBuffer::toImage() const {