1#include "debugger.h"
  2#include "gba-thread.h"
  3#include "gba.h"
  4#include "sdl-events.h"
  5#include "renderers/video-software.h"
  6
  7#include <SDL.h>
  8#ifdef __APPLE__
  9#include <OpenGL/gl.h>
 10#else
 11#include <GL/gl.h>
 12#endif
 13
 14#include <fcntl.h>
 15#include <errno.h>
 16#include <signal.h>
 17#include <sys/time.h>
 18#include <unistd.h>
 19
 20struct GLSoftwareRenderer {
 21	struct GBAVideoSoftwareRenderer d;
 22
 23	GLuint tex;
 24};
 25
 26static int _GBASDLInit(struct GLSoftwareRenderer* renderer);
 27static void _GBASDLDeinit(struct GLSoftwareRenderer* renderer);
 28static void _GBASDLRunloop(struct GBAThread* context, struct GLSoftwareRenderer* renderer);
 29
 30static const GLint _glVertices[] = {
 31	0, 0,
 32	256, 0,
 33	256, 256,
 34	0, 256
 35};
 36
 37static const GLint _glTexCoords[] = {
 38	0, 0,
 39	1, 0,
 40	1, 1,
 41	0, 1
 42};
 43
 44int main(int argc, char** argv) {
 45	const char* fname = "test.rom";
 46	if (argc > 1) {
 47		fname = argv[1];
 48	}
 49	int fd = open(fname, O_RDONLY);
 50	if (fd < 0) {
 51		return 1;
 52	}
 53
 54	sigset_t signals;
 55	sigaddset(&signals, SIGINT);
 56	sigaddset(&signals, SIGTRAP);
 57	pthread_sigmask(SIG_BLOCK, &signals, 0);
 58
 59	struct GBAThread context;
 60	struct GLSoftwareRenderer renderer;
 61	GBAVideoSoftwareRendererCreate(&renderer.d);
 62
 63	if (!_GBASDLInit(&renderer)) {
 64		return 1;
 65	}
 66
 67	context.fd = fd;
 68	context.renderer = &renderer.d.d;
 69	GBAThreadStart(&context);
 70
 71	_GBASDLRunloop(&context, &renderer);
 72
 73	GBAThreadJoin(&context);
 74	close(fd);
 75
 76	_GBASDLDeinit(&renderer);
 77
 78	return 0;
 79}
 80
 81static int _GBASDLInit(struct GLSoftwareRenderer* renderer) {
 82	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
 83		return 0;
 84	}
 85
 86	GBASDLInitEvents();
 87
 88	SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 1);
 89	SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
 90	SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
 91	SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
 92	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 93	SDL_SetVideoMode(240, 160, 32, SDL_OPENGL);
 94
 95	renderer->d.outputBuffer = malloc(256 * 256 * 4);
 96	renderer->d.outputBufferStride = 256;
 97	glGenTextures(1, &renderer->tex);
 98	glBindTexture(GL_TEXTURE_2D, renderer->tex);
 99	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
100	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
101	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
102	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
103	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
104
105	glViewport(0, 0, 240, 160);
106
107	return 1;
108}
109
110static void _GBASDLRunloop(struct GBAThread* context, struct GLSoftwareRenderer* renderer) {
111	SDL_Event event;
112
113	int err;
114	glEnable(GL_TEXTURE_2D);
115	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
116	glEnableClientState(GL_VERTEX_ARRAY);
117	glVertexPointer(2, GL_INT, 0, _glVertices);
118	glTexCoordPointer(2, GL_INT, 0, _glTexCoords);
119	glMatrixMode (GL_PROJECTION);
120	glLoadIdentity();
121	glOrtho(0, 240, 160, 0, 0, 1);
122	while (context->started) {
123		pthread_mutex_lock(&renderer->d.mutex);
124		if (renderer->d.d.framesPending) {
125			renderer->d.d.framesPending = 0;
126			pthread_mutex_unlock(&renderer->d.mutex);
127			glBindTexture(GL_TEXTURE_2D, renderer->tex);
128			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, renderer->d.outputBuffer);
129			glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
130
131			SDL_GL_SwapBuffers();
132
133			while (SDL_PollEvent(&event)) {
134				GBASDLHandleEvent(context, &event);
135			}
136			pthread_mutex_lock(&renderer->d.mutex);
137			pthread_cond_broadcast(&renderer->d.downCond);
138			pthread_mutex_unlock(&renderer->d.mutex);
139		} else {
140			while (!renderer->d.d.framesPending) {
141				struct timeval tv;
142				struct timespec ts;
143				gettimeofday(&tv, 0);
144				ts.tv_sec = tv.tv_sec;
145				ts.tv_nsec = tv.tv_usec * 1000 + 800000;
146				err = pthread_cond_timedwait(&renderer->d.upCond, &renderer->d.mutex, &ts);
147				if (err == ETIMEDOUT) {
148					break;
149				}
150			}
151			pthread_mutex_unlock(&renderer->d.mutex);
152		}
153	}
154}
155
156static void _GBASDLDeinit(struct GLSoftwareRenderer* renderer) {
157	free(renderer->d.outputBuffer);
158
159	GBASDLDeinitEvents();
160	SDL_Quit();
161}