Patch* PatchCache::get(const float bitmapWidth, const float bitmapHeight,
const float pixelWidth, const float pixelHeight,
const int32_t* xDivs, const int32_t* yDivs, const uint32_t* colors,
const uint32_t width, const uint32_t height, const int8_t numColors) {
uint32_t quadCount = countQuad(xDivs, yDivs, width, height,
bitmapWidth, bitmapHeight);
int8_t transparentQuads = 0;
uint32_t colorKey = 0;
if (uint8_t(numColors) < sizeof(uint32_t) * 4) {
for (int8_t i = 0; i < numColors; i++) {
if (colors[i] == 0x0) {
transparentQuads++;
colorKey |= 0x1 << i;
}
}
}
// If the 9patch is made of only transparent quads
if (transparentQuads == int8_t((width + 1) * (height + 1))) {
return NULL;
}
const PatchDescription description(bitmapWidth, bitmapHeight,
pixelWidth, pixelHeight, width, height, quadCount, transparentQuads, colorKey);
ssize_t index = mCache.indexOfKey(description);
Patch* mesh = NULL;
if (index >= 0) {
mesh = mCache.valueAt(index);
}
if (!mesh) {
PATCH_LOGD("New patch mesh "
"xCount=%d yCount=%d, w=%.2f h=%.2f, bw=%.2f bh=%.2f",
width, height, pixelWidth, pixelHeight, bitmapWidth, bitmapHeight);
mesh = new Patch(width, height, transparentQuads);
mesh->updateColorKey(colorKey);
mesh->copy(xDivs, yDivs);
mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
if (mCache.size() >= mMaxEntries) {
delete mCache.valueAt(mCache.size() - 1);
mCache.removeItemsAt(mCache.size() - 1, 1);
}
mCache.add(description, mesh);
} else if (!mesh->matches(xDivs, yDivs, colorKey)) {
PATCH_LOGD("Patch mesh does not match, refreshing vertices");
PATCH_LOGD("Old patch mesh "
"xCount=%d yCount=%d, w=%.2f h=%.2f, bw=%.2f bh=%.2f",
width, height, pixelWidth, pixelHeight, bitmapWidth, bitmapHeight);
mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
}
return mesh;
}
void Patch::generateQuad(TextureVertex*& vertex, float x1, float y1, float x2, float y2,
float u1, float v1, float u2, float v2, uint32_t& quadCount) {
const uint32_t oldQuadCount = quadCount;
quadCount++;
if (x1 < 0.0f) x1 = 0.0f;
if (x2 < 0.0f) x2 = 0.0f;
if (y1 < 0.0f) y1 = 0.0f;
if (y2 < 0.0f) y2 = 0.0f;
// Skip degenerate and transparent (empty) quads
if ((mColors[oldQuadCount] == 0) || x1 >= x2 || y1 >= y2) {
#if DEBUG_PATCHES_EMPTY_VERTICES
PATCH_LOGD(" quad %d (empty)", oldQuadCount);
PATCH_LOGD(" left, top = %.2f, %.2f\t\tu1, v1 = %.8f, %.8f", x1, y1, u1, v1);
PATCH_LOGD(" right, bottom = %.2f, %.2f\t\tu2, v2 = %.8f, %.8f", x2, y2, u2, v2);
#endif
return;
}
// Record all non empty quads
if (hasEmptyQuads) {
Rect bounds(x1, y1, x2, y2);
quads.add(bounds);
}
mUvMapper.map(u1, v1, u2, v2);
TextureVertex::set(vertex++, x1, y1, u1, v1);
TextureVertex::set(vertex++, x2, y1, u2, v1);
TextureVertex::set(vertex++, x1, y2, u1, v2);
TextureVertex::set(vertex++, x2, y2, u2, v2);
verticesCount += 4;
indexCount += 6;
#if DEBUG_PATCHES_VERTICES
PATCH_LOGD(" quad %d", oldQuadCount);
PATCH_LOGD(" left, top = %.2f, %.2f\t\tu1, v1 = %.8f, %.8f", x1, y1, u1, v1);
PATCH_LOGD(" right, bottom = %.2f, %.2f\t\tu2, v2 = %.8f, %.8f", x2, y2, u2, v2);
#endif
}