#ifndef RT_GFX_H
#define RT_GFX_H

/* graphics system. this is the interface of the rendering code.
 *
 * we need (at least) three different renderers:
 * - world cell renderer (for world & dungeon environments)
 * - character renderer (for animated models)
 * - object renderer (for static models)
 */

#include <stdint.h>

#include "runtime/runtime.h"

#ifdef __cplusplus
extern "C" {
#endif

#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
#elif defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable : 4201) /* anonymous struct */
#endif
typedef union {
    float v[4];
    struct {
        float r;
        float g;
        float b;
        float a;
    };
} rt_color;
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic pop
#elif defined(_MSC_VER)
#pragma warning(pop)
#endif

/* NOTE(kevin): When you add a value here, you need to handle them in
 * framegraph_processor.c : ParseFramegraph
 * and in the render target and texture functions of all renderers. */

typedef enum {
    RT_PIXEL_FORMAT_INVALID,

    RT_PIXEL_FORMAT_R8G8B8A8_UNORM,
    RT_PIXEL_FORMAT_B8G8R8A8_UNORM,
    RT_PIXEL_FORMAT_R8G8B8A8_SRGB,
    RT_PIXEL_FORMAT_B8G8R8A8_SRGB,
    RT_PIXEL_FORMAT_R8G8B8_UNORM,
    RT_PIXEL_FORMAT_B8G8R8_UNORM,
    RT_PIXEL_FORMAT_R8G8B8_SRGB,
    RT_PIXEL_FORMAT_B8G8R8_SRGB,

    RT_PIXEL_FORMAT_DEPTH24_STENCIL8,
    RT_PIXEL_FORMAT_DEPTH32,

    /* Special value indicating whichever format the swapchain uses */
    RT_PIXEL_FORMAT_SWAPCHAIN,

    RT_PIXEL_FORMAT_count,
} rt_pixel_format;

RT_INLINE int rtIsDepthFormat(rt_pixel_format format) {
    return format == RT_PIXEL_FORMAT_DEPTH24_STENCIL8 || format == RT_PIXEL_FORMAT_DEPTH32;
}

/* In renderer_api.h -> Not necessary for almost all gfx usage */
typedef struct rt_renderer_init_info_s rt_renderer_init_info;

RT_DLLEXPORT void rtRegisterRendererCVars(void);

RT_DLLEXPORT rt_result rtInitGFX(rt_renderer_init_info *renderer_info);

RT_DLLEXPORT void rtShutdownGFX(void);

RT_DLLEXPORT void rtBeginGFXFrame(unsigned int frame_id);

RT_DLLEXPORT void rtEndGFXFrame(unsigned int frame_id);

#ifdef __cplusplus
}
#endif

#endif