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src/engine/render/render_shared.h

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+// Shared header for render stuff
+#ifndef RENDER_SHARED_H
+#define RENDER_SHARED_H
+
+#include <stdint.h>
+
+#include "utils/maths.h"
+#include "render/color.h"
+
+enum class BufferAccess
+{
+	READ_ONLY,
+	WRITE_ONLY,
+	READ_WRITE
+};
+
+// texture format
+enum PixelFormat
+{
+	PF_UNKNOWN,
+	PF_R8G8B8,
+	PF_R8G8B8A8,
+	PF_R8G8B8F,
+	PF_R8G8B8A8F,
+
+	// Depth formats
+	PF_DEPTH32F
+};
+
+// pixel format convertion
+uint32_t getGLPF(PixelFormat pf);
+uint32_t getGLInternalPF(PixelFormat pf);
+uint32_t getGLTypePF(PixelFormat pf);
+
+// Blending functions
+enum BlendFactor
+{
+	BF_ZERO,
+	BF_ONE,
+	BF_SRC_COLOR,
+	BF_ONE_MINUS_SRC_COLOR,
+	BF_DST_COLOR,
+	BF_ONE_MINUS_DST_COLOR,
+	BF_SRC_ALPHA,
+	BF_ONE_MINUS_SRC_ALPHA,
+	BF_DST_ALPHA,
+	BF_ONE_MINUS_DST_ALPHA,
+	BF_CONSTANT_COLOR,
+	BF_ONE_MINUS_CONSTANT_COLOR,
+	BF_CONSTANT_ALPHA,
+	BF_ONE_MINUS_CONSTANT_ALPHA
+};
+
+// Blending factor convertion
+uint32_t GetGLBlendFactor(BlendFactor factor);
+
+// Base structure for render view (view and projection matrices, viewport settings)
+struct View
+{
+	glm::mat4 view;
+	glm::mat4 proj;
+
+	int x, y;
+	int width, height;
+
+	float fov;
+};
+
+// Global instance of render view
+extern View g_renderView;
+
+// Stretched picture vertex
+struct StretchedVertex
+{
+	Vec3 position;
+	Vec2 texcoord;
+};
+
+#define MAX_STRETCH_VX 12 * sizeof(StretchedVertex)
+
+// debugging stuff
+void check_for_opengl_error();
+
+#endif