// Blit the output bitmap to the screen and flip the buffer if double buffered
void drawFrame(void)
{
SDL_Rect dstRect;
dstRect.x = 0;
dstRect.y = 0;
dstRect.w = GB_DISPLAY_WIDTH * scaleFactor;
dstRect.h = GB_DISPLAY_HEIGHT * scaleFactor;
if (showTilemap)
{
drawTilemap(gbSurface);
}
if (SDL_SoftStretch(gbSurface, NULL, screen, &dstRect) != 0)
{
printf("ERROR: Cannot blit surface\n");
exit(0);
}
if (SDL_Flip(screen) != 0)
{
printf("ERROR: Could not flip framebuffer\n");
}
frames++;
}
void Renderer::render(GLFWwindow *window, double t, double dt)
{
Vf2 projection_dims = getProjectionDimensions(gamestate->window_size.x, gamestate->window_size.y);
M4x4<float> view_mat = getViewMatrix();
// TODO(scott): this should be cached and not recalculated every frame
M4x4<float> projection_mat = M4x4<float>::orthographicProj(0, projection_dims.x, 0, projection_dims.y, -1, 1);
glViewport(0, 0, gamestate->window_size.x, gamestate->window_size.y);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, projection_dims.x, 0, projection_dims.y, -1, 1);
glMatrixMode(GL_MODELVIEW);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
glEnable(GL_TEXTURE_2D);
glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo_id);
glTexCoordPointer(num_texcoord_vertex, GL_FLOAT, sizeof(GLfloat) * (num_position_vertex + num_texcoord_vertex), (float*)(sizeof(GLfloat)*num_position_vertex));
glVertexPointer(num_position_vertex, GL_FLOAT, sizeof(GLfloat) * (num_position_vertex + num_texcoord_vertex), NULL);
drawTilemap(view_mat, projection_mat);
drawEntities(view_mat, projection_mat);
glDisable(GL_TEXTURE_2D);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glfwSwapBuffers(window);
glfwPollEvents();
}
