Dawn/src/display/framebuffer.c

76 lines
2.1 KiB
C

/**
* Copyright (c) 2021 Dominic Masters
*
* This software is released under the MIT License.
* https://opensource.org/licenses/MIT
*/
#include "framebuffer.h"
void frameBufferInit(framebuffer_t *fb, int32_t w, int32_t h) {
// At least one pixel
if(w <= 0) w = 1;
if(h <= 0) h = 1;
// Create Color Attachment texture.
textureInit(&fb->texture, w, h, NULL);
// Create Frame Buffer
glGenFramebuffers(1, &fb->fboId);
glBindFramebuffer(GL_FRAMEBUFFER, fb->fboId);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, fb->texture.id, 0
);
// Render Buffer
glGenRenderbuffers(1, &fb->rboId);
glBindRenderbuffer(GL_RENDERBUFFER, fb->rboId);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, w, h);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, fb->rboId
);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
uint32_t error;
error = 0;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
void frameBufferUse(framebuffer_t *frameBuffer, bool clear) {
glBindFramebuffer(GL_FRAMEBUFFER, frameBuffer->fboId);
glViewport(0, 0, frameBuffer->texture.width, frameBuffer->texture.height);
if(clear) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
}
void frameBufferResize(framebuffer_t *frameBuffer,int32_t width,int32_t height){
if((
frameBuffer->texture.width == width &&
frameBuffer->texture.height == height
)) return;
frameBufferDispose(frameBuffer);
frameBufferInit(frameBuffer, width, height);
}
void frameBufferUnbind(render_t *render, bool clear) {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glViewport(0, 0, render->width, render->height);
if(clear) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
}
void frameBufferDispose(framebuffer_t *frameBuffer) {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glDeleteRenderbuffers(1, &frameBuffer->rboId);
glDeleteFramebuffers(1, &frameBuffer->fboId);
textureDispose(&frameBuffer->texture);
}