void VideoEngine::DrawGrid(float x, float y, float x_step, float y_step, const Color &c)
{
PushState();
Move(0, 0);
float x_max = _current_context.coordinate_system.GetRight();
float y_max = _current_context.coordinate_system.GetBottom();
std::vector<GLfloat> vertices;
int32 num_vertices = 0;
for(; x <= x_max; x += x_step) {
vertices.push_back(x);
vertices.push_back(_current_context.coordinate_system.GetBottom());
vertices.push_back(x);
vertices.push_back(_current_context.coordinate_system.GetTop());
num_vertices += 2;
}
for(; y < y_max; y += y_step) {
vertices.push_back(_current_context.coordinate_system.GetLeft());
vertices.push_back(y);
vertices.push_back(_current_context.coordinate_system.GetRight());
vertices.push_back(y);
num_vertices += 2;
}
glColor4fv(&c[0]);
DisableTexture2D();
EnableVertexArray();
glVertexPointer(2, GL_FLOAT, 0, &(vertices[0]));
glDrawArrays(GL_LINES, 0, num_vertices);
PopState();
}
void VideoEngine::DrawLine(float x1, float y1, float x2, float y2, float width, const Color& color)
{
GLfloat vert_coords[] = {
x1, y1,
x2, y2
};
EnableBlending();
DisableTexture2D();
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Normal blending
glPushAttrib(GL_LINE_WIDTH);
glLineWidth(width);
EnableVertexArray();
DisableColorArray();
DisableTextureCoordArray();
glColor4fv((GLfloat *)color.GetColors());
glVertexPointer(2, GL_FLOAT, 0, vert_coords);
glDrawArrays(GL_LINES, 0, 2);
glPopAttrib(); // GL_LINE_WIDTH
}
bool VideoEngine::ApplySettings()
{
if(_target == VIDEO_TARGET_SDL_WINDOW) {
// Losing GL context, so unload images first
if(TextureManager && TextureManager->UnloadTextures() == false) {
IF_PRINT_WARNING(VIDEO_DEBUG) << "failed to delete OpenGL textures during a context change" << std::endl;
}
int32 flags = SDL_OPENGL;
if(_temp_fullscreen == true) {
flags |= SDL_FULLSCREEN;
}
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 2);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 4);
SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 1);
if(SDL_SetVideoMode(_temp_width, _temp_height, 0, flags) == false) {
// RGB values of 1 for each and 8 for depth seemed to be sufficient.
// 565 and 16 here because it works with them on this computer.
// NOTE from prophile: this ought to be changed to 5558
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 6);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 0);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 0);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 0);
SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 1);
if(SDL_SetVideoMode(_temp_width, _temp_height, 0, flags) == false) {
IF_PRINT_WARNING(VIDEO_DEBUG) << "SDL_SetVideoMode() failed with error: " << SDL_GetError() << std::endl;
_temp_fullscreen = _fullscreen;
_temp_width = _screen_width;
_temp_height = _screen_height;
if(TextureManager && _screen_width > 0) { // Test to see if we already had a valid video mode
TextureManager->ReloadTextures();
}
return false;
}
}
// Clear GL state, after SDL_SetVideoMode() for OSX compatibility
DisableBlending();
DisableTexture2D();
DisableAlphaTest();
DisableStencilTest();
DisableScissoring();
DisableVertexArray();
DisableColorArray();
DisableTextureCoordArray();
// Turn off writing to the depth buffer
glDepthMask(GL_FALSE);
_screen_width = _temp_width;
_screen_height = _temp_height;
_fullscreen = _temp_fullscreen;
if(TextureManager)
TextureManager->ReloadTextures();
return true;
} // if (_target == VIDEO_TARGET_SDL_WINDOW)
// Used by the editor, which uses QT4
else if(_target == VIDEO_TARGET_QT_WIDGET) {
_screen_width = _temp_width;
_screen_height = _temp_height;
_fullscreen = _temp_fullscreen;
return true;
}
return false;
} // bool VideoEngine::ApplySettings()
