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Only draw visible pixels

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This commit is contained in:
Maschell 2023-01-19 15:08:52 +01:00
parent 7c7288ba67
commit 9db68c5d76
1 changed files with 9 additions and 0 deletions
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9
source/utils/DrawUtils.cpp
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@ -121,6 +121,9 @@ void DrawUtils::clear(Color col) {
}
void DrawUtils::drawPixel(uint32_t x, uint32_t y, uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
if (a == 0) {
return;
}
float opacity = a / 255.0f;
// put pixel in the drc buffer
@ -302,6 +305,9 @@ void DrawUtils::setFontColor(Color col) {
}
static void draw_freetype_bitmap(SFT_Image *bmp, int32_t x, int32_t y) {
if (font_col.a == 0) {
return;
}
int32_t i, j, p, q;
int32_t x_max = x + bmp->width;
@ -314,6 +320,9 @@ static void draw_freetype_bitmap(SFT_Image *bmp, int32_t x, int32_t y) {
if (i < 0 || j < 0 || i >= SCREEN_WIDTH || j >= SCREEN_HEIGHT) {
continue;
}
if (src[q * bmp->width + p] == 0) {
continue;
}
float opacity = src[q * bmp->width + p] / 255.0f;
DrawUtils::drawPixel(i, j, font_col.r, font_col.g, font_col.b, font_col.a * opacity);