void mandel(t_env *e)
{
int x;
int y;
int i;
int pxl;
e->fract = 2;
x = 0;
while (x <= W_WIDTH)
{
y = 0;
while (y <= W_HEIGHT)
{
init_mandel(x, y, e);
i = iter_mandel(e);
pxl = x * e->bpp / 8 + y * e->sl;
e->data[pxl] = get_red(i, e);
e->data[pxl + 1] = get_green(i, e);
e->data[pxl + 2] = get_blue(i, e);
y++;
}
x++;
}
}
void init_gl(const opt_data *opt_data, int width, int height)
{
if(!ogl_LoadFunctions()) {
fprintf(stderr, "ERROR: Failed to load GL extensions\n");
exit(EXIT_FAILURE);
}
CHECK_GL_ERR;
if(!(ogl_GetMajorVersion() > 1 || ogl_GetMinorVersion() >= 4)) {
fprintf(stderr, "ERROR: Your OpenGL Implementation is too old\n");
exit(EXIT_FAILURE);
}
opts = opt_data;
GLboolean force_fixed = opts->gl_opts != NULL && strstr(opts->gl_opts, "fixed") != NULL;
GLboolean res_boost = opts->gl_opts != NULL && strstr(opts->gl_opts, "rboost") != NULL;
packed_intesity_pixels = opts->gl_opts != NULL && strstr(opts->gl_opts, "pintens") != NULL;
scr_w = width; scr_h = height;
if(opts->fullscreen) im_w = scr_w, im_h=scr_h;
else im_w = IMAX(make_pow2(IMAX(scr_w, scr_h)), 128)<<res_boost; im_h = im_w;
while(!check_res(im_w, im_h)) { // shrink textures until they work
printf(" %ix%i Too big! Shrink texture\n", im_h, im_w);
im_w = im_w/2;
im_h = im_h/2;
}
printf("Using internel resolution of %ix%i\n\n", im_h, im_w);
CHECK_GL_ERR;
setup_viewport(scr_w, scr_h); CHECK_GL_ERR;
//glEnable(GL_LINE_SMOOTH); CHECK_GL_ERR;
glClear(GL_COLOR_BUFFER_BIT); CHECK_GL_ERR;
glRasterPos2f(-1,1 - 20.0f/(scr_h*0.5f));
//draw_string("Loading... "); swap_buffers(); CHECK_GL_ERR;
printf("GL_VENDOR: %s\n", glGetString(GL_VENDOR));
printf("GL_RENDERER: %s\n", glGetString(GL_RENDERER));
printf("GL_VERSION: %s\n", glGetString(GL_VERSION));
if(ogl_ext_ARB_shading_language_100) printf("GL_SL_VERSION: %s\n", glGetString(GL_SHADING_LANGUAGE_VERSION_ARB));
printf("GL_EXTENSIONS: %s\n", glGetString(GL_EXTENSIONS));
printf("\n\n");
/*
void DebugMessageControlARB(enum source,
enum type,
enum severity,
sizei count,
const uint* ids,
boolean enabled);
*/
if(ogl_ext_ARB_debug_output) {
glDebugMessageCallbackARB((GLDEBUGPROCARB)gl_debug_callback, NULL);
#if DEBUG
glDebugMessageControlARB(GL_DONT_CARE,
GL_DONT_CARE,
GL_DONT_CARE,
0, NULL,
GL_TRUE);
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
#else
glDebugMessageControlARB(GL_DONT_CARE,
GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB,
GL_DONT_CARE,
0, NULL,
GL_TRUE);
glDebugMessageControlARB(GL_DONT_CARE,
GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB,
GL_DONT_CARE,
0, NULL,
GL_TRUE);
#endif
printf("Have ARB_debug_output: registered callback\n");
}
CHECK_GL_ERR;
// for ES we need:
// EXT_blend_minmax
// EXT_texture_format_BGRA8888
// optionally we should use
// EXT_texture_rg + OES_texture_float/OES_texture_half_float
// OES_mapbuffer
/* if(!ogl_ext_EXT_blend_minmax) { // can stop checking for this, it's in OpenGL 1.4*/
/* printf("missing required gl extension EXT_blend_minmax!\n");*/
/* exit(1);*/
/* }*/
if(!ogl_ext_EXT_framebuffer_object && !ogl_ext_ARB_framebuffer_object) {
printf("missing required gl extension EXT_framebuffer_object!\n");
exit(1);
}
// TODO: this should also pass if we have GL 2.0+
if(!ogl_ext_ARB_shading_language_100 && !(ogl_ext_ARB_fragment_shader && ogl_ext_ARB_vertex_shader && ogl_ext_ARB_shader_objects)) {
if(!ogl_ext_ARB_pixel_buffer_object)
printf("Missing GLSL and no pixel buffer objects, WILL be slow!\n");
else
printf("No GLSL using all fixed function! (might be slow)\n");
}
if(force_fixed) {
printf("Fixed function code forced\n");
packed_intesity_pixels = GL_FALSE;
}
CHECK_GL_ERR;
if(packed_intesity_pixels) printf("Packed intensity enabled\n");
glEnable(GL_TEXTURE_2D); CHECK_GL_ERR;
init_mandel(); CHECK_GL_ERR;
if(!force_fixed) glfract = fractal_glsl_init(opts, im_w, im_h, packed_intesity_pixels);
if(!glfract) glfract = fractal_fixed_init(opts, im_w, im_h);
CHECK_GL_ERR;
if(!force_fixed) glmaxsrc = maxsrc_new_glsl(IMAX(im_w>>res_boost, 256), IMAX(im_h>>res_boost, 256), packed_intesity_pixels);
if(!glmaxsrc) glmaxsrc = maxsrc_new_fixed(IMAX(im_w>>res_boost, 256), IMAX(im_h>>res_boost, 256));
CHECK_GL_ERR;
if(!force_fixed) glpal = pal_init_glsl(packed_intesity_pixels);
if(!glpal) glpal = pal_init_fixed(im_w, im_h);
CHECK_GL_ERR;
pd = new_point_data(opts->rational_julia?4:2);
memset(frametimes, 0, sizeof(frametimes));
totframetime = frametimes[0] = MAX(10000000/opts->draw_rate, 1);
memset(worktimes, 0, sizeof(worktimes));
totworktime = worktimes[0] = MIN(10000000/opts->draw_rate, 1);
tick0 = uget_ticks();
}
