Implement basic sRGB. Include frambuffers and postprocessing.

src/Framebuffer.cpp

@@ -0,0 +1,39 @@
+#include "Framebuffer.h"
+
+#include <cstddef>
+
+Framebuffer::Framebuffer(uint32_t width, uint32_t height) {
+
+    glGenFramebuffers(1, &FBO);
+
+    glGenTextures(2, textures);
+
+    glBindTexture(GL_TEXTURE_2D, textures[0]);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    glBindTexture(GL_TEXTURE_2D, textures[1]);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, width, height, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+    bind();
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textures[0], 0);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, textures[1], 0);
+    unbind();
+}
+
+Framebuffer::~Framebuffer() {
+    glDeleteFramebuffers(1, &FBO);
+    glDeleteTextures(2, textures);
+}
+
+void Framebuffer::bind() {
+    glBindFramebuffer(GL_FRAMEBUFFER, FBO);
+}
+
+void Framebuffer::unbind() {
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}