| // Copyright 2023 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| #include "public/pw_framebuffer/writer.h" |
| #include "pw_assert/assert.h" |
| |
| using pw::color::color_rgb565_t; |
| |
| namespace pw::framebuffer { |
| |
| FramebufferReader::FramebufferReader(const Framebuffer& framebuffer) |
| : framebuffer_(framebuffer) { |
| PW_ASSERT(framebuffer_.pixel_format() == PixelFormat::RGB565); |
| PW_ASSERT(framebuffer_.is_valid()); |
| } |
| |
| Result<color_rgb565_t> FramebufferReader::GetPixel(uint16_t x, |
| uint16_t y) const { |
| if (x >= framebuffer_.size().width || y >= framebuffer_.size().height) { |
| return Status::OutOfRange(); |
| } |
| const color_rgb565_t* data = |
| static_cast<const color_rgb565_t*>(framebuffer_.data()); |
| return data[y * framebuffer_.size().width + x]; |
| } |
| |
| } // namespace pw::framebuffer |
