1#ifdef USE_CLI_DEBUGGER
  2#include "debugger/cli-debugger.h"
  3#endif
  4
  5#ifdef USE_GDB_STUB
  6#include "debugger/gdb-stub.h"
  7#endif
  8
  9#include "gba-thread.h"
 10#include "gba.h"
 11#include "sdl-audio.h"
 12#include "sdl-events.h"
 13#include "renderers/video-software.h"
 14#include "platform/commandline.h"
 15
 16#include <SDL.h>
 17#ifdef __APPLE__
 18#include <OpenGL/gl.h>
 19#else
 20#include <GL/gl.h>
 21#endif
 22
 23#include <errno.h>
 24#include <signal.h>
 25#include <sys/time.h>
 26
 27struct GLSoftwareRenderer {
 28	struct GBAVideoSoftwareRenderer d;
 29	struct GBASDLAudio audio;
 30	struct GBASDLEvents events;
 31#if SDL_VERSION_ATLEAST(2, 0, 0)
 32	SDL_Window* window;
 33#endif
 34
 35	int viewportWidth;
 36	int viewportHeight;
 37	GLuint tex;
 38};
 39
 40static int _GBASDLInit(struct GLSoftwareRenderer* renderer);
 41static void _GBASDLDeinit(struct GLSoftwareRenderer* renderer);
 42static void _GBASDLRunloop(struct GBAThread* context, struct GLSoftwareRenderer* renderer);
 43static void _GBASDLStart(struct GBAThread* context);
 44static void _GBASDLClean(struct GBAThread* context);
 45
 46static const GLint _glVertices[] = {
 47	0, 0,
 48	256, 0,
 49	256, 256,
 50	0, 256
 51};
 52
 53static const GLint _glTexCoords[] = {
 54	0, 0,
 55	1, 0,
 56	1, 1,
 57	0, 1
 58};
 59
 60int main(int argc, char** argv) {
 61	struct GLSoftwareRenderer renderer;
 62	GBAVideoSoftwareRendererCreate(&renderer.d);
 63
 64	struct StartupOptions opts;
 65	struct SubParser subparser;
 66	struct GraphicsOpts graphicsOpts;
 67	initParserForGraphics(&subparser, &graphicsOpts);
 68	if (!parseCommandArgs(&opts, argc, argv, &subparser)) {
 69		usage(argv[0], subparser.usage);
 70		return 1;
 71	}
 72
 73	renderer.viewportWidth = graphicsOpts.width;
 74	renderer.viewportHeight = graphicsOpts.height;
 75#if SDL_VERSION_ATLEAST(2, 0, 0)
 76	renderer.events.fullscreen = graphicsOpts.fullscreen;
 77	renderer.events.windowUpdated = 0;
 78#endif
 79
 80	if (!_GBASDLInit(&renderer)) {
 81		return 1;
 82	}
 83
 84	struct GBAThread context = {
 85		.renderer = &renderer.d.d,
 86		.startCallback = _GBASDLStart,
 87		.cleanCallback = _GBASDLClean,
 88		.sync.videoFrameWait = 0,
 89		.sync.audioWait = 1,
 90		.userData = &renderer
 91	};
 92
 93	context.debugger = createDebugger(&opts);
 94
 95	GBAMapOptionsToContext(&opts, &context);
 96
 97	GBAThreadStart(&context);
 98
 99	_GBASDLRunloop(&context, &renderer);
100
101	GBAThreadJoin(&context);
102	close(opts.fd);
103	if (opts.biosFd >= 0) {
104		close(opts.biosFd);
105	}
106	free(context.debugger);
107
108	_GBASDLDeinit(&renderer);
109
110	return 0;
111}
112
113static int _GBASDLInit(struct GLSoftwareRenderer* renderer) {
114	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
115		return 0;
116	}
117
118	GBASDLInitEvents(&renderer->events);
119	GBASDLInitAudio(&renderer->audio);
120
121#if SDL_VERSION_ATLEAST(2, 0, 0)
122	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
123#else
124	SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 1);
125#endif
126
127#ifndef COLOR_16_BIT
128	SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
129	SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
130	SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
131#else
132	SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
133#ifdef COLOR_5_6_5
134	SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 6);
135#else
136	SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
137#endif
138	SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
139#endif
140
141#if SDL_VERSION_ATLEAST(2, 0, 0)
142	renderer->window = SDL_CreateWindow("GBAc", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, renderer->viewportWidth, renderer->viewportHeight, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | (SDL_WINDOW_FULLSCREEN_DESKTOP * renderer->events.fullscreen));
143	SDL_GL_CreateContext(renderer->window);
144	SDL_GetWindowSize(renderer->window, &renderer->viewportWidth, &renderer->viewportHeight);
145	renderer->events.window = renderer->window;
146#else
147#ifdef COLOR_16_BIT
148	SDL_SetVideoMode(renderer->viewportWidth, renderer->viewportHeight, 16, SDL_OPENGL);
149#else
150	SDL_SetVideoMode(renderer->viewportWidth, renderer->viewportHeight, 32, SDL_OPENGL);
151#endif
152#endif
153
154	renderer->d.outputBuffer = malloc(256 * 256 * 4);
155	renderer->d.outputBufferStride = 256;
156	glGenTextures(1, &renderer->tex);
157	glBindTexture(GL_TEXTURE_2D, renderer->tex);
158	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
159	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
160	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
161#ifndef _WIN32
162	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
163	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
164#endif
165
166	glViewport(0, 0, renderer->viewportWidth, renderer->viewportHeight);
167
168	return 1;
169}
170
171static void _GBASDLRunloop(struct GBAThread* context, struct GLSoftwareRenderer* renderer) {
172	SDL_Event event;
173
174	glEnable(GL_TEXTURE_2D);
175	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
176	glEnableClientState(GL_VERTEX_ARRAY);
177	glVertexPointer(2, GL_INT, 0, _glVertices);
178	glTexCoordPointer(2, GL_INT, 0, _glTexCoords);
179	glMatrixMode (GL_PROJECTION);
180	glLoadIdentity();
181	glOrtho(0, 240, 160, 0, 0, 1);
182	while (context->state < THREAD_EXITING) {
183		if (GBASyncWaitFrameStart(&context->sync, context->frameskip)) {
184			glBindTexture(GL_TEXTURE_2D, renderer->tex);
185#ifdef COLOR_16_BIT
186			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, renderer->d.outputBuffer);
187#else
188			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, renderer->d.outputBuffer);
189#endif
190			if (context->sync.videoFrameWait) {
191				glFlush();
192			}
193		}
194		glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
195		GBASyncWaitFrameEnd(&context->sync);
196#if SDL_VERSION_ATLEAST(2, 0, 0)
197		SDL_GL_SwapWindow(renderer->window);
198#else
199		SDL_GL_SwapBuffers();
200#endif
201
202		while (SDL_PollEvent(&event)) {
203			GBASDLHandleEvent(context, &renderer->events, &event);
204#if SDL_VERSION_ATLEAST(2, 0, 0)
205			// Event handling can change the size of the screen
206			if (renderer->events.windowUpdated) {
207				SDL_GetWindowSize(renderer->window, &renderer->viewportWidth, &renderer->viewportHeight);
208				glViewport(0, 0, renderer->viewportWidth, renderer->viewportHeight);
209				renderer->events.windowUpdated = 0;
210			}
211#endif
212		}
213	}
214}
215
216static void _GBASDLDeinit(struct GLSoftwareRenderer* renderer) {
217	free(renderer->d.outputBuffer);
218
219	GBASDLDeinitEvents(&renderer->events);
220	GBASDLDeinitAudio(&renderer->audio);
221#if SDL_VERSION_ATLEAST(2, 0, 0)
222	SDL_DestroyWindow(renderer->window);
223#endif
224	SDL_Quit();
225}
226
227static void _GBASDLStart(struct GBAThread* threadContext) {
228	struct GLSoftwareRenderer* renderer = threadContext->userData;
229	renderer->audio.audio = &threadContext->gba->audio;
230}
231
232static void _GBASDLClean(struct GBAThread* threadContext) {
233	struct GLSoftwareRenderer* renderer = threadContext->userData;
234	renderer->audio.audio = 0;
235}