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	GLint scanlineAffine[GBA_VIDEO_VERTICAL_PIXELS * 4];
 68	GLint scanlineOffset[GBA_VIDEO_VERTICAL_PIXELS];
 69};
 70
 71enum {
 72	GBA_GL_FBO_OBJ = 0,
 73	GBA_GL_FBO_BACKDROP,
 74	GBA_GL_FBO_WINDOW,
 75	GBA_GL_FBO_OUTPUT,
 76	GBA_GL_FBO_MAX
 77};
 78
 79enum {
 80	GBA_GL_TEX_OBJ_COLOR = 0,
 81	GBA_GL_TEX_OBJ_FLAGS,
 82	GBA_GL_TEX_OBJ_DEPTH,
 83	GBA_GL_TEX_BACKDROP_COLOR,
 84	GBA_GL_TEX_BACKDROP_FLAGS,
 85	GBA_GL_TEX_WINDOW,
 86	GBA_GL_TEX_MAX
 87};
 88
 89enum {
 90	GBA_GL_VS_LOC = 0,
 91	GBA_GL_VS_MAXPOS,
 92
 93	GBA_GL_BG_VRAM = 2,
 94	GBA_GL_BG_PALETTE,
 95	GBA_GL_BG_SCREENBASE,
 96	GBA_GL_BG_CHARBASE,
 97	GBA_GL_BG_SIZE,
 98	GBA_GL_BG_OFFSET,
 99	GBA_GL_BG_INFLAGS,
100	GBA_GL_BG_TRANSFORM,
101	GBA_GL_BG_RANGE,
102	GBA_GL_BG_MOSAIC,
103
104	GBA_GL_OBJ_VRAM = 2,
105	GBA_GL_OBJ_PALETTE,
106	GBA_GL_OBJ_CHARBASE,
107	GBA_GL_OBJ_STRIDE,
108	GBA_GL_OBJ_LOCALPALETTE,
109	GBA_GL_OBJ_INFLAGS,
110	GBA_GL_OBJ_TRANSFORM,
111	GBA_GL_OBJ_DIMS,
112	GBA_GL_OBJ_OBJWIN,
113	GBA_GL_OBJ_MOSAIC,
114
115	GBA_GL_WIN_DISPCNT = 2,
116	GBA_GL_WIN_BLEND,
117	GBA_GL_WIN_FLAGS,
118	GBA_GL_WIN_WIN0,
119	GBA_GL_WIN_WIN1,
120
121	GBA_GL_FINALIZE_SCALE = 2,
122	GBA_GL_FINALIZE_LAYERS,
123	GBA_GL_FINALIZE_FLAGS,
124	GBA_GL_FINALIZE_WINDOW,
125	GBA_GL_FINALIZE_BACKDROP,
126	GBA_GL_FINALIZE_BACKDROPFLAGS,
127
128	GBA_GL_UNIFORM_MAX = 12
129};
130
131struct GBAVideoGLShader {
132	GLuint program;
133	GLuint vao;
134	GLuint uniforms[GBA_GL_UNIFORM_MAX];
135};
136
137struct GBAVideoGLRenderer {
138	struct GBAVideoRenderer d;
139
140	uint32_t* temporaryBuffer;
141
142	struct GBAVideoGLBackground bg[4];
143
144	int oamMax;
145	bool oamDirty;
146	struct GBAVideoRendererSprite sprites[128];
147
148	GLuint fbo[GBA_GL_FBO_MAX];
149	GLuint layers[GBA_GL_TEX_MAX];
150	GLuint vbo;
151
152	GLuint outputTex;
153
154	GLint shadowPalette[512];
155	bool paletteDirty;
156
157	GLuint vramTex;
158	unsigned vramDirty;
159
160	uint16_t shadowRegs[0x30];
161	uint64_t regsDirty;
162
163	struct GBAVideoGLShader bgShader[6];
164	struct GBAVideoGLShader objShader[3];
165	struct GBAVideoGLShader windowShader;
166	struct GBAVideoGLShader finalizeShader;
167
168	GBARegisterDISPCNT dispcnt;
169
170	unsigned target1Obj;
171	unsigned target1Bd;
172	unsigned target2Obj;
173	unsigned target2Bd;
174	enum GBAVideoBlendEffect blendEffect;
175	uint16_t blda;
176	uint16_t bldb;
177	uint16_t bldy;
178
179	GBAMosaicControl mosaic;
180
181	struct GBAVideoGLWindowN {
182		struct GBAVideoWindowRegion h;
183		struct GBAVideoWindowRegion v;
184		GBAWindowControl control;
185	} winN[2];
186
187	GLint winNHistory[2][GBA_VIDEO_VERTICAL_PIXELS * 4];
188
189	GBAWindowControl winout;
190	GBAWindowControl objwin;
191
192	int firstAffine;
193	int firstY;
194
195	int scale;
196};
197
198void GBAVideoGLRendererCreate(struct GBAVideoGLRenderer* renderer);
199
200#endif
201
202CXX_GUARD_END
203
204#endif