pw_framebuffer: Rename FramebufferRgb565 to Framebuffer.
Change-Id: Iafd7059fccfe5d9a0a043d7c48a5c716ca5d01b7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/129550
Reviewed-by: Anthony DiGirolamo <tonymd@google.com>
Commit-Queue: Chris Mumford <cmumford@google.com>
diff --git a/pw_graphics/pw_framebuffer/framebuffer.cc b/pw_graphics/pw_framebuffer/framebuffer.cc
new file mode 100644
index 0000000..97a1441
--- /dev/null
+++ b/pw_graphics/pw_framebuffer/framebuffer.cc
@@ -0,0 +1,91 @@
+// Copyright 2022 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/framebuffer.h"
+
+#include <cstddef>
+
+#include "pw_assert/assert.h"
+
+using pw::color::color_rgb565_t;
+
+namespace pw::framebuffer {
+
+Framebuffer::Framebuffer()
+ : pixel_data_(nullptr), width_(0), height_(0), row_bytes_(0) {}
+
+Framebuffer::Framebuffer(color_rgb565_t* data,
+ int width,
+ int height,
+ int row_bytes)
+ : pixel_data_(data),
+ width_(width),
+ height_(height),
+ row_bytes_(row_bytes) {}
+
+Framebuffer::Framebuffer(Framebuffer&& other)
+ : pixel_data_(other.pixel_data_),
+ width_(other.width_),
+ height_(other.height_),
+ row_bytes_(other.row_bytes_) {
+ other.pixel_data_ = nullptr;
+}
+
+Framebuffer& Framebuffer::operator=(Framebuffer&& rhs) {
+ pixel_data_ = rhs.pixel_data_;
+ width_ = rhs.width_;
+ height_ = rhs.height_;
+ row_bytes_ = rhs.row_bytes_;
+ rhs.pixel_data_ = nullptr;
+ return *this;
+}
+
+// Return the RGB565 color at position x, y. Bounds are checked.
+Result<color_rgb565_t> Framebuffer::GetPixel(int x, int y) const {
+ PW_ASSERT(IsValid());
+ if (x >= 0 && x < width_ && y >= 0 && y < height_) {
+ return pixel_data_[y * width_ + x];
+ }
+ return Status::OutOfRange();
+}
+
+// Draw a color at (x, y) if it's a valid position.
+void Framebuffer::SetPixel(int x, int y, color_rgb565_t rgb565_color) {
+ PW_ASSERT(IsValid());
+ if (x >= 0 && x < width_ && y >= 0 && y < height_) {
+ pixel_data_[y * width_ + x] = rgb565_color;
+ }
+}
+
+// Copy the colors from another framebuffer into this one at position x, y.
+void Framebuffer::Blit(const Framebuffer& fb, int x, int y) {
+ PW_ASSERT(fb.IsValid());
+ for (int current_x = 0; current_x < fb.width_; current_x++) {
+ for (int current_y = 0; current_y < fb.height_; current_y++) {
+ if (auto pixel_color = fb.GetPixel(current_x, current_y);
+ pixel_color.ok()) {
+ SetPixel(x + current_x, y + current_y, pixel_color.value());
+ }
+ }
+ }
+}
+
+// Fill the entire buffer with a color.
+void Framebuffer::Fill(color_rgb565_t color) {
+ PW_ASSERT(IsValid());
+ for (int i = 0; i < width_ * height_; i++) {
+ pixel_data_[i] = color;
+ }
+}
+
+} // namespace pw::framebuffer
