1/* Copyright (c) 2013-2019 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#ifndef VIDEO_GL_H
  7#define VIDEO_GL_H
  8
  9#include <mgba-util/common.h>
 10
 11CXX_GUARD_START
 12
 13#include <mgba/core/core.h>
 14#include <mgba/gba/interface.h>
 15#include <mgba/internal/gba/io.h>
 16#include <mgba/internal/gba/renderers/common.h>
 17#include <mgba/internal/gba/video.h>
 18
 19#if defined(BUILD_GLES2) || defined(BUILD_GLES3)
 20
 21#ifdef USE_EPOXY
 22#include <epoxy/gl.h>
 23#elif defined(BUILD_GL)
 24#ifdef __APPLE__
 25#include <OpenGL/gl3.h>
 26#else
 27#define GL_GLEXT_PROTOTYPES
 28#include <GL/gl.h>
 29#include <GL/glext.h>
 30#endif
 31#else
 32#include <GLES3/gl3.h>
 33#endif
 34
 35struct GBAVideoGLAffine {
 36	int16_t dx;
 37	int16_t dmx;
 38	int16_t dy;
 39	int16_t dmy;
 40	int32_t sx;
 41	int32_t sy;
 42};
 43
 44struct GBAVideoGLBackground {
 45	GLuint fbo;
 46	GLuint tex;
 47	GLuint flags;
 48
 49	unsigned index;
 50	int enabled;
 51	unsigned priority;
 52	uint32_t charBase;
 53	int mosaic;
 54	int multipalette;
 55	uint32_t screenBase;
 56	int overflow;
 57	int size;
 58	int target1;
 59	int target2;
 60	uint16_t x;
 61	uint16_t y;
 62	int32_t refx;
 63	int32_t refy;
 64
 65	struct GBAVideoGLAffine affine;
 66};
 67
 68enum {
 69	GBA_GL_FBO_OBJ = 0,
 70	GBA_GL_FBO_BACKDROP,
 71	GBA_GL_FBO_WINDOW,
 72	GBA_GL_FBO_OUTPUT,
 73	GBA_GL_FBO_MAX
 74};
 75
 76enum {
 77	GBA_GL_TEX_OBJ_COLOR = 0,
 78	GBA_GL_TEX_OBJ_FLAGS,
 79	GBA_GL_TEX_BACKDROP_COLOR,
 80	GBA_GL_TEX_BACKDROP_FLAGS,
 81	GBA_GL_TEX_WINDOW,
 82	GBA_GL_TEX_AFFINE_2,
 83	GBA_GL_TEX_AFFINE_3,
 84	GBA_GL_TEX_MAX
 85};
 86
 87enum {
 88	GBA_GL_VS_LOC = 0,
 89	GBA_GL_VS_MAXPOS,
 90
 91	GBA_GL_BG_VRAM = 2,
 92	GBA_GL_BG_PALETTE,
 93	GBA_GL_BG_SCREENBASE,
 94	GBA_GL_BG_CHARBASE,
 95	GBA_GL_BG_SIZE,
 96	GBA_GL_BG_OFFSET,
 97	GBA_GL_BG_INFLAGS,
 98	GBA_GL_BG_TRANSFORM,
 99	GBA_GL_BG_RANGE,
100	GBA_GL_BG_MOSAIC,
101
102	GBA_GL_OBJ_VRAM = 2,
103	GBA_GL_OBJ_PALETTE,
104	GBA_GL_OBJ_CHARBASE,
105	GBA_GL_OBJ_STRIDE,
106	GBA_GL_OBJ_LOCALPALETTE,
107	GBA_GL_OBJ_INFLAGS,
108	GBA_GL_OBJ_TRANSFORM,
109	GBA_GL_OBJ_DIMS,
110	GBA_GL_OBJ_OBJWIN,
111	GBA_GL_OBJ_MOSAIC,
112
113	GBA_GL_FINALIZE_SCALE = 2,
114	GBA_GL_FINALIZE_LAYERS,
115	GBA_GL_FINALIZE_FLAGS,
116	GBA_GL_FINALIZE_WINDOW,
117	GBA_GL_FINALIZE_BACKDROP,
118	GBA_GL_FINALIZE_BACKDROPFLAGS,
119
120	GBA_GL_UNIFORM_MAX = 12
121};
122
123struct GBAVideoGLShader {
124	GLuint program;
125	GLuint vao;
126	GLuint uniforms[GBA_GL_UNIFORM_MAX];
127};
128
129struct GBAVideoGLRenderer {
130	struct GBAVideoRenderer d;
131
132	uint32_t* temporaryBuffer;
133
134	struct GBAVideoGLBackground bg[4];
135	struct GBAVideoGLAffine affine[2][GBA_VIDEO_VERTICAL_PIXELS];
136
137	int oamMax;
138	bool oamDirty;
139	struct GBAVideoRendererSprite sprites[128];
140
141	GLuint fbo[GBA_GL_FBO_MAX];
142	GLuint layers[GBA_GL_TEX_MAX];
143	GLuint vbo;
144
145	GLuint outputTex;
146
147#ifdef BUILD_GLES3
148	uint16_t shadowPalette[512];
149#endif
150	GLuint paletteTex;
151	bool paletteDirty;
152
153	GLuint vramTex;
154	unsigned vramDirty;
155
156	uint16_t shadowRegs[0x30];
157	uint64_t regsDirty;
158
159	struct GBAVideoGLShader bgShader[6];
160	struct GBAVideoGLShader objShader[2];
161	struct GBAVideoGLShader finalizeShader;
162
163	GBARegisterDISPCNT dispcnt;
164
165	unsigned target1Obj;
166	unsigned target1Bd;
167	unsigned target2Obj;
168	unsigned target2Bd;
169	enum GBAVideoBlendEffect blendEffect;
170	uint16_t blda;
171	uint16_t bldb;
172	uint16_t bldy;
173
174	GBAMosaicControl mosaic;
175
176	struct GBAVideoGLWindowN {
177		struct GBAVideoWindowRegion h[2];
178		struct GBAVideoWindowRegion v;
179		GBAWindowControl control;
180	} winN[2];
181
182	GBAWindowControl winout;
183	GBAWindowControl objwin;
184
185	int firstAffine;
186	int firstY;
187
188	int scale;
189};
190
191void GBAVideoGLRendererCreate(struct GBAVideoGLRenderer* renderer);
192
193#endif
194
195CXX_GUARD_END
196
197#endif