nuclear@0: #include <stdio.h>
nuclear@1: #include <assert.h>
nuclear@1: #include <algorithm>
nuclear@0: #include "opengl.h"
nuclear@0: #include "game.h"
nuclear@0: #include "goatvr.h"
nuclear@0: 
nuclear@1: static void create_rtarg(int x, int y);
nuclear@1: static int next_pow2(int x);
nuclear@1: 
nuclear@1: static int win_width, win_height;
nuclear@1: static unsigned int fb_tex;
nuclear@1: static unsigned int fbo, fb_depth;
nuclear@1: static int fb_xsz, fb_ysz;
nuclear@1: static int fb_tex_xsz, fb_tex_ysz;
nuclear@1: 
nuclear@0: bool game_init()
nuclear@0: {
nuclear@0: 	init_opengl();
nuclear@0: 
nuclear@0: 	if(vr_init() == -1) {
nuclear@0: 		return false;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	glEnable(GL_DEPTH_TEST);
nuclear@0: 	glEnable(GL_CULL_FACE);
nuclear@1: 
nuclear@1: 	int sdk_fb_xsz = vr_getf(VR_LEYE_XRES) + vr_getf(VR_REYE_XRES);
nuclear@1: 	int sdk_fb_ysz = std::max(vr_getf(VR_LEYE_YRES), vr_getf(VR_REYE_YRES));
nuclear@1: 	create_rtarg(sdk_fb_xsz, sdk_fb_ysz);
nuclear@1: 
nuclear@1: 	return true;
nuclear@0: }
nuclear@0: 
nuclear@0: void game_cleanup()
nuclear@0: {
nuclear@0: 	vr_shutdown();
nuclear@0: }
nuclear@0: 
nuclear@1: void game_update(long tm)
nuclear@1: {
nuclear@1: }
nuclear@1: 
nuclear@1: void game_display()
nuclear@1: {
nuclear@1: }
nuclear@1: 
nuclear@1: void game_reshape(int x, int y)
nuclear@1: {
nuclear@1: }
nuclear@1: 
nuclear@0: void game_keyboard(int key, bool pressed);
nuclear@0: void game_mouse_button(int bn, bool state, int x, int y);
nuclear@0: void game_mouse_motion(int x, int y);
nuclear@0: 
nuclear@1: 
nuclear@1: static void create_rtarg(int x, int y)
nuclear@1: {
nuclear@1: 	if(x == fb_xsz && y == fb_ysz) {
nuclear@1: 		return;	// nothing changed
nuclear@1: 	}
nuclear@1: 
nuclear@1: 	fb_xsz = x;
nuclear@1: 	fb_ysz = y;
nuclear@1: 	fb_tex_xsz = next_pow2(fb_xsz);
nuclear@1: 	fb_tex_ysz = next_pow2(fb_ysz);
nuclear@1: 
nuclear@1: 	if(!fbo) {
nuclear@1: 		glGenFramebuffers(1, &fbo);
nuclear@1: 
nuclear@1: 		glGenTextures(1, &fb_tex);
nuclear@1: 		glBindTexture(GL_TEXTURE_2D, fb_tex);
nuclear@1: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@1: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@1: 
nuclear@1: 		glGenRenderbuffers(1, &fb_depth);
nuclear@1: 	}
nuclear@1: 
nuclear@1: 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@1: 
nuclear@1: 	glBindTexture(GL_TEXTURE_2D, fb_tex);
nuclear@1: 	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, fb_tex_xsz, fb_tex_ysz, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
nuclear@1: 	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fb_tex, 0);
nuclear@1: 
nuclear@1: 	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, fb_tex_xsz, fb_tex_ysz);
nuclear@1: 	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, fb_depth);
nuclear@1: 
nuclear@1: 	assert(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
nuclear@1: 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
nuclear@1: }
nuclear@1: 
nuclear@1: static int next_pow2(int x)
nuclear@1: {
nuclear@1: 	x -= 1;
nuclear@1: 	x |= x >> 1;
nuclear@1: 	x |= x >> 2;
nuclear@1: 	x |= x >> 4;
nuclear@1: 	x |= x >> 8;
nuclear@1: 	x |= x >> 16;
nuclear@1: 	return x + 1;
nuclear@1: }