device(std::size_t screen_width,
std::size_t screen_height,
std::size_t window_scale)
: screen_width_(screen_width),
screen_height_(screen_height),
window_scale_(window_scale),
frame_(screen_width * window_scale, screen_height * window_scale),
texture_factory_(),
graphics_context_(),
offscreen_texture_(texture_factory().create(screen_width, screen_height)),
framebuffer_(generate_frame_buffer()) {
this->frame_.connect_updating(boost::bind(&device::update, this));
::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, this->framebuffer_);
::glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D,
this->offscreen_texture_.id(),
0);
if (::glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) != GL_FRAMEBUFFER_COMPLETE_EXT) {
throw std::runtime_error("framebuffer is not supported completely");
}
::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
void process_commands(void)
{
struct SECommandListNode *temp, *free_node;
union SECommand *command;
// swap buffers
pthread_mutex_lock(&command_queue_mutex);
temp = command_read_list;
command_read_list = command_write_list;
command_write_list = temp;
pthread_mutex_unlock(&command_queue_mutex);
while (command_read_list != NULL) {
command = &(command_read_list->command);
switch (command->type) {
case UPDATE_OAM :
if (command->update_oam.oam_index < NUM_MUNDANE_SPRITES) {
oam_registers[command->update_oam.oam_index].enable = command->update_oam.enable;
oam_registers[command->update_oam.oam_index].palette = command->update_oam.palette;
oam_registers[command->update_oam.oam_index].flip_x = command->update_oam.flip_x;
oam_registers[command->update_oam.oam_index].flip_y = command->update_oam.flip_y;
oam_registers[command->update_oam.oam_index].x_offset = command->update_oam.x_offset;
oam_registers[command->update_oam.oam_index].y_offset = command->update_oam.y_offset;
} else if (command->update_oam.oam_index >= INSTANCE_INDEX_MIN && command->update_oam.oam_index < INSTANCE_INDEX_MAX) {
// update instace sprite
uint oam_index = command->update_oam.oam_index - INSTANCE_INDEX_MIN;
memory.instance_oam_registers[oam_index].enable = command->update_oam.enable;
memory.instance_oam_registers[oam_index].palette = command->update_oam.palette;
memory.instance_oam_registers[oam_index].flip_x = command->update_oam.flip_x;
memory.instance_oam_registers[oam_index].flip_y = command->update_oam.flip_y;
memory.instance_oam_registers[oam_index].x_offset = command->update_oam.x_offset;
memory.instance_oam_registers[oam_index].y_offset = command->update_oam.y_offset;
memory.instance_oam_registers[oam_index].sprite_size = command->update_oam.sprite_size;
memory.instance_oam_registers[oam_index].sprite = command->update_oam.sprite;
memory.instance_oam_registers[oam_index].transpose = command->update_oam.transpose;
}
// do nothing otherwise
break;
case(SET_PRIORITY_CTRL):
memory.iprctl = command->set_priority_control.iprctl;
break;
case(UPDATE_CRAM):
memory.color_palettes[command->update_cram.cram_index].colors[command->update_cram.palette_index] =
(struct PaletteColor) {command->update_cram.red, command->update_cram.green, command->update_cram.blue};
break;
case(UPDATE_VRAM):
{
uint chunk_index = command->update_vram.chunk;
uint pixel_x = command->update_vram.pixel_x;
uint pixel_y = command->update_vram.pixel_y;
if (command->update_vram.chunk < VRAM_CHUNK_GRANDE_BASE) { // INSTANCE CHUNKS
memory.instance_chunks[chunk_index].pixel[pixel_x + pixel_y * INSTANCE_BASE_SIZE]
= command->update_vram.p_data;
} else if (command->update_vram.chunk < VRAM_CHUNK_VRENDE_BASE) { // GRANDE CHUNKS
chunk_index -= VRAM_CHUNK_GRANDE_BASE;
memory.grande_sprites[chunk_index].pixels[pixel_x + pixel_y * GRANDE_SIZE]
= command->update_vram.p_data;
} else if (command->update_vram.chunk < VRAM_CHUNK_VENTI_BASE) { // VRENDE CHUNKS
chunk_index -= VRAM_CHUNK_VRENDE_BASE;
memory.vrende_sprites[chunk_index / 4]
.pixels[((chunk_index % 4) / 2) * (2 * GRANDE_SIZE * GRANDE_SIZE)
+ (chunk_index % 2) * GRANDE_SIZE // align to the 0,0
+ (pixel_y * 2 * GRANDE_SIZE)
+ pixel_x] = command->update_vram.p_data;
} else if (command->update_vram.chunk < VRAM_CHUNK_BACKGROUND_BASE) { // VENTI CHUNKS
chunk_index -= VRAM_CHUNK_VENTI_BASE;
memory.vrende_sprites[chunk_index / 16]
.pixels[((chunk_index % 16) / 4) * (4 * GRANDE_SIZE * GRANDE_SIZE)
+ (chunk_index % 4) * GRANDE_SIZE
+ (pixel_y * 4 * GRANDE_SIZE)
+ pixel_x] = command->update_vram.p_data;
} else if (command->update_vram.chunk < VRAM_CHUNK_BACKGROUND_MAX) { // BACKGROUND CHUNKS
chunk_index -= VRAM_CHUNK_BACKGROUND_BASE;
if (chunk_index < 70) {
memory.background_sprite.pixels[(chunk_index / 10) * BACKGROUND_WIDTH * GRANDE_SIZE
+ (chunk_index % 10) * GRANDE_SIZE
+ pixel_y * BACKGROUND_WIDTH
+ pixel_x] = command->update_vram.p_data;
} else {
uint pixel_index = (chunk_index / 10) * BACKGROUND_WIDTH * GRANDE_SIZE
+ (chunk_index % 5) * 2 * GRANDE_SIZE
+ pixel_y * BACKGROUND_WIDTH
+ pixel_x;
if (pixel_y >= (GRANDE_SIZE / 2)) {
pixel_index -= (GRANDE_SIZE / 2) * BACKGROUND_WIDTH;
pixel_index += GRANDE_SIZE;
}
memory.background_sprite.pixels[pixel_index] = command->update_vram.p_data;
}
} // else do nothing
break;
}
default:
// Do nothing
break;
}
free_node = command_read_list;
command_read_list = command_read_list->next_node;
free(free_node);
}
generate_frame_buffer();
}
