First commit

src/DivaGL/renderer/fbo.cpp

@@ -0,0 +1,62 @@
+/*
+    by korenkonder
+    GitHub/GitLab: korenkonder
+*/
+
+#include "fbo.hpp"
+#include "../gl_state.hpp"
+
+namespace renderer {
+#pragma warning(push)
+#pragma warning(disable: 6385)
+#pragma warning(disable: 6386)
+    void FBO::init(int32_t width, int32_t height,
+        GLuint* color_textures, int32_t count, GLuint depth_texture) {
+        free();
+
+        count = min_def(count, 8);
+
+        this->width = width;
+        this->height = height;
+        this->count = count;
+        flags = (Flags)0;
+        if (depth_texture) {
+            this->flags = DEPTH_ATTACHMENT;
+            this->count++;
+        }
+
+        textures = new GLuint[this->count];
+        for (int32_t i = 0; i < count; i++)
+            textures[i] = color_textures[i];
+
+        if (flags & DEPTH_ATTACHMENT)
+            textures[count] = depth_texture;
+
+        glGenFramebuffers(1, &buffer);
+        glBindFramebuffer(GL_FRAMEBUFFER, buffer);
+        for (int32_t i = 0; i < count; i++)
+            glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, textures[i], 0);
+
+        if (flags & DEPTH_ATTACHMENT)
+            glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, textures[count], 0);
+
+        GLenum color_attachments[8];
+        for (int32_t i = 0; i < count; i++)
+            color_attachments[i] = GL_COLOR_ATTACHMENT0 + i;
+        glDrawBuffers(count, color_attachments);
+        glCheckFramebufferStatus(GL_FRAMEBUFFER);
+    }
+#pragma warning(pop)
+
+    void FBO::free() {
+        if (buffer) {
+            glDeleteFramebuffers(1, &buffer);
+            buffer = 0;
+        }
+
+        if (textures) {
+            delete[] textures;
+            textures = 0;
+        }
+    }
+}