58 lines
2.2 KiB
C++
58 lines
2.2 KiB
C++
#include "ExtendedScreen.h"
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#include <algorithm>
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#include <cstdint>
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void
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ExtendedScreen::drawTransparentBitmap(int16_t x, int16_t y, const bitmap_t& bitmap, const RGB& foreground, const RGB& background) {
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_screen->startWrite();
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for (int16_t j = 0; j < bitmap.height; j++, y++) {
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for (int16_t i = 0; i < bitmap.width; i++) {
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uint8_t alpha = bitmap.data[j*bitmap.width+i]; // todo: allow for less than 8 bit per pixel
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uint16_t blended_color = foreground.alpha_blend_over_to565(background, alpha);
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_screen->writePixel(x + i, y, blended_color);
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}
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}
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_screen->endWrite();
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}
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void
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ExtendedScreen::drawTransparentBitmap(int16_t x, int16_t y, const bitmap_t& bitmap, const RGB& foreground, const RGB& background, const rect_t& rect) {
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auto background565 = background.to_565();
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_screen->startWrite();
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int16_t max_image_width = std::min(static_cast<int16_t>(rect.x + rect.width), static_cast<int16_t>(bitmap.width));
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int16_t max_image_height = std::min(static_cast<int16_t>(rect.y + rect.height), static_cast<int16_t>(bitmap.height));
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int16_t j = rect.y;
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for(; j < 0; j++) {
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for (int16_t i = rect.x; i < rect.x + rect.width; i++) {
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_screen->writePixel(x + i - rect.x, y + j - rect.y, background565);
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}
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}
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for (; j < max_image_height; j++) {
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int16_t i = rect.x;
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for (; i < 0; i++) {
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_screen->writePixel(x + i - rect.x, y + j - rect.y, background565);
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}
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for (; i < max_image_width; i++) {
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uint8_t alpha = bitmap.data[j*bitmap.width+i]; // todo: allow for less than 8 bit per pixel
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uint16_t blended_color = foreground.alpha_blend_over_to565(background, alpha);
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_screen->writePixel(x + i - rect.x, y + j - rect.y, blended_color);
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}
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for (; i < rect.x + rect.width; i++) {
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_screen->writePixel(x + i - rect.x, y + j - rect.y, background565);
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}
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}
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for(; j < rect.y + rect.height; j++) {
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for (int16_t i = rect.x; i < rect.x + rect.width; i++) {
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_screen->writePixel(x + i - rect.x, y + j - rect.y, background565);
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}
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}
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_screen->endWrite();
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}
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