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@ -120,12 +120,9 @@ void PPU::render()
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bool tile_data_mode = lcd_control & LCDC::BGandWindowTileDataArea; |
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uint32_t tile_data_address = (tile_data_mode) ? 0x8000 : 0x8800; |
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// Pallete
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uint8_t bg_palette = Emu::the().readMemory(0xff47) & 0xff; |
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for (uint32_t i = 0; i < tile_map_size; ++i) { |
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uint8_t tile_index = Emu::the().readMemory(bg_tile_map_address + i); |
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drawTile((i % 32) * TILE_WIDTH, (i / 32) * TILE_HEIGHT, tile_data_address + (tile_index * TILE_SIZE), bg_palette); |
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drawTile((i % 32) * TILE_WIDTH, (i / 32) * TILE_HEIGHT, tile_data_address + (tile_index * TILE_SIZE)); |
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} |
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} |
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@ -135,7 +132,7 @@ void PPU::render()
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scene.addComponent<Inferno::SpriteComponent>(m_entity, glm::vec4 { 1.0f }, texture); |
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} |
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void PPU::drawTile(uint32_t x, uint32_t y, uint32_t tile_address, uint8_t bg_palette) |
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void PPU::drawTile(uint32_t x, uint32_t y, uint32_t tile_address) |
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{ |
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uint32_t viewport_x = Emu::the().readMemory(0xff43); |
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uint32_t viewport_y = Emu::the().readMemory(0xff42); |
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@ -160,28 +157,10 @@ void PPU::drawTile(uint32_t x, uint32_t y, uint32_t tile_address, uint8_t bg_pal
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} |
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uint8_t pixel_index = (pixels_lsb >> (7 - tile_x) | ((pixels_msb >> (7 - tile_x)) << 1)) & 0x3; |
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uint8_t pixel_color = (bg_palette >> (pixel_index * 2)) & 0x3; |
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if (pixel_color == 0) { |
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m_screen[index + 0] = 255; |
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m_screen[index + 1] = 255; |
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m_screen[index + 2] = 255; |
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} |
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else if (pixel_color == 1) { |
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m_screen[index + 0] = 168; |
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m_screen[index + 1] = 168; |
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m_screen[index + 2] = 168; |
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} |
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else if (pixel_color == 2) { |
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m_screen[index + 0] = 84; |
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m_screen[index + 1] = 84; |
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m_screen[index + 2] = 84; |
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} |
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else if (pixel_color == 3) { |
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m_screen[index + 0] = 0; |
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m_screen[index + 1] = 0; |
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m_screen[index + 2] = 0; |
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} |
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uint8_t pixel_color = getPixelColor(pixel_index, Palette::BGP); |
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m_screen[index + 0] = pixel_color; |
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m_screen[index + 1] = pixel_color; |
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m_screen[index + 2] = pixel_color; |
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} |
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// Move to next line
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@ -189,6 +168,36 @@ void PPU::drawTile(uint32_t x, uint32_t y, uint32_t tile_address, uint8_t bg_pal
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} |
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} |
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uint8_t PPU::getPixelColor(uint8_t color_index, Palette palette) |
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{ |
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VERIFY(color_index < 4, "trying to fetch invalid color index '{}'", color_index); |
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switch (Emu::the().mode()) { |
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case Emu::Mode::DMG: { |
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uint8_t palette_data = Emu::the().readMemory(palette) & 0xff; |
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uint8_t palette_value = palette_data >> (color_index * 2) & 0x3; |
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switch (palette_value) { |
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case 0: |
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return 255; |
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case 1: |
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return 168; |
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case 2: |
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return 84; |
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case 3: |
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return 0; |
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default: |
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VERIFY_NOT_REACHED(); |
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}; |
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} |
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case Emu::Mode::CGB: |
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VERIFY_NOT_REACHED(); |
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default: |
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VERIFY_NOT_REACHED(); |
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} |
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return 0; |
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} |
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void PPU::resetFrame() |
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{ |
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m_state = State::OAMSearch; |
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