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#include "glbase.h"
#include "engine.h"
#include "generic.h"
#include <SDL.h>
#include <SDL_opengl.h>
int mogltk::glbase::width, mogltk::glbase::height, mogltk::glbase::inited = 0, mogltk::glbase::twoD = 0;
SDL_Surface * mogltk::glbase::surface = 0;
int mogltk::glbase::setup(int w, int h, int flags) throw(GeneralException) {
if (inited) {
printm(M_WARNING, "mogltk::glbase::setup called twice, ignoring second call...\n");
return -1;
}
width = w;
height = h;
mogltk::engine::setup();
if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0) {
throw GeneralException(String("Couldn't initialise Video SubSystem: ") + SDL_GetError());
}
if (!(surface = SDL_SetVideoMode(width, height, 0, flags | SDL_OPENGL))) {
throw GeneralException(String("Couldn't set GL mode: ") + SDL_GetError());
}
float ratio = surface->w;
ratio /= surface->h;
printm(M_INFO, "Video resolution: %dx%dx%d (ratio = %3.2f)\n", surface->w, surface->h, surface->format->BitsPerPixel, ratio);
printm(M_INFO, "\n");
printm(M_INFO, "OpenGL infos\n");
printm(M_INFO, "------------\n");
printm(M_INFO, String("Vendor : ") + (char *) glGetString(GL_VENDOR) + "\n");
printm(M_INFO, String("Renderer : ") + (char *) glGetString(GL_RENDERER) + "\n");
printm(M_INFO, String("Version : ") + (char *) glGetString(GL_VERSION) + "\n");
printm(M_INFO, String("Extensions: ") + (char *) glGetString(GL_EXTENSIONS) + "\n");
inited = 1;
glViewport(0, 0, surface->w, surface->h);
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
glEnable(GL_CULL_FACE);
glClearColor(0, 0, 0, 0);
glShadeModel(GL_SMOOTH);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0, ratio, 1.0, 1024.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
Flip();
return 0;
}
int mogltk::glbase::GetWidth(void) {
return width;
}
int mogltk::glbase::GetHeight(void) {
return height;
}
int mogltk::glbase::GetInited(void) {
return inited;
}
void mogltk::glbase::Enter2DMode(void) {
if (twoD)
return;
glPushAttrib(GL_ENABLE_BIT);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0.0, width, height, 0.0, 0.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
twoD = 1;
}
void mogltk::glbase::Leave2DMode(void) {
if (!twoD)
return;
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glPopAttrib();
twoD = 0;
}
void mogltk::glbase::Flip() {
SDL_GL_SwapBuffers();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
bool mogltk::glbase::is2D() {
return twoD;
}
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