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(svn r23316) -Feature: Add ability to zoom in to 2x and 4x level.

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peter1138
2011-11-24 12:38:48 +00:00
parent 15d0a22aac
commit 81598273e9
29 changed files with 331 additions and 128 deletions
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18
src/spriteloader/grf.cpp
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@@ -95,7 +95,7 @@ bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot,
if (num != 0) return WarnCorruptSprite(file_slot, file_pos, __LINE__);
sprite->AllocateData(sprite->width * sprite->height);
sprite->AllocateData(sprite->width * sprite->height * ZOOM_LVL_BASE * ZOOM_LVL_BASE);
/* When there are transparency pixels, this format has another trick.. decode it */
if (type & 0x08) {
@@ -163,6 +163,22 @@ bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot,
}
}
if (ZOOM_LVL_BASE != 1 && sprite_type == ST_NORMAL) {
/* Simple scaling, back-to-front so that no intermediate buffers are needed. */
int width = sprite->width * ZOOM_LVL_BASE;
int height = sprite->height * ZOOM_LVL_BASE;
for (int y = height - 1; y >= 0; y--) {
for (int x = width - 1; x >= 0; x--) {
sprite->data[y * width + x] = sprite->data[y / ZOOM_LVL_BASE * sprite->width + x / ZOOM_LVL_BASE];
}
}
sprite->width *= ZOOM_LVL_BASE;
sprite->height *= ZOOM_LVL_BASE;
sprite->x_offs *= ZOOM_LVL_BASE;
sprite->y_offs *= ZOOM_LVL_BASE;
}
/* Make sure to mark all transparent pixels transparent on the alpha channel too */
for (int i = 0; i < sprite->width * sprite->height; i++) {
if (sprite->data[i].m != 0) sprite->data[i].a = 0xFF;