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Merge pull request #596 from adamharrison/fix-clip-boundaries 

Fixed clip boundaries.
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Adam 2021-10-12 21:51:52 -04:00 committed by GitHub
parent e99d0e51c1 7c1ff0f3d8
commit 3e2b0f28c8
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 2 deletions
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10
src/renderer.c
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@ -238,7 +238,8 @@ float ren_draw_text(RenFont *font, const char *text, float x, int y, RenColor co
int bitmap_index = font->subpixel ? (int)(fmod(pen_x, 1.0) * SUBPIXEL_BITMAPS_CACHED) : 0; int bitmap_index = font->subpixel ? (int)(fmod(pen_x, 1.0) * SUBPIXEL_BITMAPS_CACHED) : 0;
GlyphSet* set = font_get_glyphset(font, codepoint, bitmap_index + (bitmap_index < 0 ? SUBPIXEL_BITMAPS_CACHED : 0)); GlyphSet* set = font_get_glyphset(font, codepoint, bitmap_index + (bitmap_index < 0 ? SUBPIXEL_BITMAPS_CACHED : 0));
GlyphMetric* metric = &set->metrics[codepoint % 256]; GlyphMetric* metric = &set->metrics[codepoint % 256];
int start_x = floor(pen_x) + metric->bitmap_left, end_x = metric->x1 - metric->x0 + pen_x; int start_x = floor(pen_x) + metric->bitmap_left;
int end_x = (metric->x1 - metric->x0) + start_x;
int glyph_end = metric->x1, glyph_start = metric->x0; int glyph_end = metric->x1, glyph_start = metric->x0;
if (set->surface && color.a > 0 && end_x >= clip.x && start_x < clip_end_x) { if (set->surface && color.a > 0 && end_x >= clip.x && start_x < clip_end_x) {
unsigned char* source_pixels = set->surface->pixels; unsigned char* source_pixels = set->surface->pixels;
@ -250,8 +251,13 @@ float ren_draw_text(RenFont *font, const char *text, float x, int y, RenColor co
break; break;
if (start_x + (glyph_end - glyph_start) >= clip_end_x) if (start_x + (glyph_end - glyph_start) >= clip_end_x)
glyph_end = glyph_start + (clip_end_x - start_x); glyph_end = glyph_start + (clip_end_x - start_x);
else if (start_x < clip.x) {
int offset = clip.x - start_x;
start_x += offset;
glyph_start += offset;
}
unsigned int* destination_pixel = (unsigned int*)&destination_pixels[surface->pitch * target_y + start_x * bytes_per_pixel]; unsigned int* destination_pixel = (unsigned int*)&destination_pixels[surface->pitch * target_y + start_x * bytes_per_pixel];
unsigned char* source_pixel = &source_pixels[line * set->surface->pitch + metric->x0 * (font->subpixel ? 3 : 1)]; unsigned char* source_pixel = &source_pixels[line * set->surface->pitch + glyph_start * (font->subpixel ? 3 : 1)];
for (int x = glyph_start; x < glyph_end; ++x) { for (int x = glyph_start; x < glyph_end; ++x) {
unsigned int destination_color = *destination_pixel; unsigned int destination_color = *destination_pixel;
SDL_Color dst = { (destination_color >> 16) & 0xFF, (destination_color >> 8) & 0xFF, (destination_color >> 0) & 0xFF, (destination_color >> 24) & 0xFF }; SDL_Color dst = { (destination_color >> 16) & 0xFF, (destination_color >> 8) & 0xFF, (destination_color >> 0) & 0xFF, (destination_color >> 24) & 0xFF };