1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/SkGr.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,314 @@
1.4 +/*
1.5 + * Copyright 2010 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#include "SkGr.h"
1.12 +#include "SkConfig8888.h"
1.13 +#include "SkMessageBus.h"
1.14 +#include "SkPixelRef.h"
1.15 +#include "GrResourceCache.h"
1.16 +
1.17 +/* Fill out buffer with the compressed format Ganesh expects from a colortable
1.18 + based bitmap. [palette (colortable) + indices].
1.19 +
1.20 + At the moment Ganesh only supports 8bit version. If Ganesh allowed we others
1.21 + we could detect that the colortable.count is <= 16, and then repack the
1.22 + indices as nibbles to save RAM, but it would take more time (i.e. a lot
1.23 + slower than memcpy), so skipping that for now.
1.24 +
1.25 + Ganesh wants a full 256 palette entry, even though Skia's ctable is only as big
1.26 + as the colortable.count says it is.
1.27 + */
1.28 +static void build_compressed_data(void* buffer, const SkBitmap& bitmap) {
1.29 + SkASSERT(SkBitmap::kIndex8_Config == bitmap.config());
1.30 +
1.31 + SkAutoLockPixels alp(bitmap);
1.32 + if (!bitmap.readyToDraw()) {
1.33 + SkDEBUGFAIL("bitmap not ready to draw!");
1.34 + return;
1.35 + }
1.36 +
1.37 + SkColorTable* ctable = bitmap.getColorTable();
1.38 + char* dst = (char*)buffer;
1.39 +
1.40 + uint32_t* colorTableDst = reinterpret_cast<uint32_t*>(dst);
1.41 + const uint32_t* colorTableSrc = reinterpret_cast<const uint32_t*>(ctable->lockColors());
1.42 + SkConvertConfig8888Pixels(colorTableDst, 0, SkCanvas::kRGBA_Premul_Config8888,
1.43 + colorTableSrc, 0, SkCanvas::kNative_Premul_Config8888,
1.44 + ctable->count(), 1);
1.45 + ctable->unlockColors();
1.46 +
1.47 + // always skip a full 256 number of entries, even if we memcpy'd fewer
1.48 + dst += kGrColorTableSize;
1.49 +
1.50 + if ((unsigned)bitmap.width() == bitmap.rowBytes()) {
1.51 + memcpy(dst, bitmap.getPixels(), bitmap.getSize());
1.52 + } else {
1.53 + // need to trim off the extra bytes per row
1.54 + size_t width = bitmap.width();
1.55 + size_t rowBytes = bitmap.rowBytes();
1.56 + const char* src = (const char*)bitmap.getPixels();
1.57 + for (int y = 0; y < bitmap.height(); y++) {
1.58 + memcpy(dst, src, width);
1.59 + src += rowBytes;
1.60 + dst += width;
1.61 + }
1.62 + }
1.63 +}
1.64 +
1.65 +////////////////////////////////////////////////////////////////////////////////
1.66 +
1.67 +static void generate_bitmap_cache_id(const SkBitmap& bitmap, GrCacheID* id) {
1.68 + // Our id includes the offset, width, and height so that bitmaps created by extractSubset()
1.69 + // are unique.
1.70 + uint32_t genID = bitmap.getGenerationID();
1.71 + SkIPoint origin = bitmap.pixelRefOrigin();
1.72 + int16_t width = SkToS16(bitmap.width());
1.73 + int16_t height = SkToS16(bitmap.height());
1.74 +
1.75 + GrCacheID::Key key;
1.76 + memcpy(key.fData8 + 0, &genID, 4);
1.77 + memcpy(key.fData8 + 4, &origin.fX, 4);
1.78 + memcpy(key.fData8 + 8, &origin.fY, 4);
1.79 + memcpy(key.fData8 + 12, &width, 2);
1.80 + memcpy(key.fData8 + 14, &height, 2);
1.81 + static const size_t kKeyDataSize = 16;
1.82 + memset(key.fData8 + kKeyDataSize, 0, sizeof(key) - kKeyDataSize);
1.83 + GR_STATIC_ASSERT(sizeof(key) >= kKeyDataSize);
1.84 + static const GrCacheID::Domain gBitmapTextureDomain = GrCacheID::GenerateDomain();
1.85 + id->reset(gBitmapTextureDomain, key);
1.86 +}
1.87 +
1.88 +static void generate_bitmap_texture_desc(const SkBitmap& bitmap, GrTextureDesc* desc) {
1.89 + desc->fFlags = kNone_GrTextureFlags;
1.90 + desc->fWidth = bitmap.width();
1.91 + desc->fHeight = bitmap.height();
1.92 + desc->fConfig = SkBitmapConfig2GrPixelConfig(bitmap.config());
1.93 + desc->fSampleCnt = 0;
1.94 +}
1.95 +
1.96 +namespace {
1.97 +
1.98 +// When the SkPixelRef genID changes, invalidate a corresponding GrResource described by key.
1.99 +class GrResourceInvalidator : public SkPixelRef::GenIDChangeListener {
1.100 +public:
1.101 + explicit GrResourceInvalidator(GrResourceKey key) : fKey(key) {}
1.102 +private:
1.103 + GrResourceKey fKey;
1.104 +
1.105 + virtual void onChange() SK_OVERRIDE {
1.106 + const GrResourceInvalidatedMessage message = { fKey };
1.107 + SkMessageBus<GrResourceInvalidatedMessage>::Post(message);
1.108 + }
1.109 +};
1.110 +
1.111 +} // namespace
1.112 +
1.113 +static void add_genID_listener(GrResourceKey key, SkPixelRef* pixelRef) {
1.114 + SkASSERT(NULL != pixelRef);
1.115 + pixelRef->addGenIDChangeListener(SkNEW_ARGS(GrResourceInvalidator, (key)));
1.116 +}
1.117 +
1.118 +static GrTexture* sk_gr_create_bitmap_texture(GrContext* ctx,
1.119 + bool cache,
1.120 + const GrTextureParams* params,
1.121 + const SkBitmap& origBitmap) {
1.122 + SkBitmap tmpBitmap;
1.123 +
1.124 + const SkBitmap* bitmap = &origBitmap;
1.125 +
1.126 + GrTextureDesc desc;
1.127 + generate_bitmap_texture_desc(*bitmap, &desc);
1.128 +
1.129 + if (SkBitmap::kIndex8_Config == bitmap->config()) {
1.130 + // build_compressed_data doesn't do npot->pot expansion
1.131 + // and paletted textures can't be sub-updated
1.132 + if (ctx->supportsIndex8PixelConfig(params, bitmap->width(), bitmap->height())) {
1.133 + size_t imagesize = bitmap->width() * bitmap->height() + kGrColorTableSize;
1.134 + SkAutoMalloc storage(imagesize);
1.135 +
1.136 + build_compressed_data(storage.get(), origBitmap);
1.137 +
1.138 + // our compressed data will be trimmed, so pass width() for its
1.139 + // "rowBytes", since they are the same now.
1.140 +
1.141 + if (cache) {
1.142 + GrCacheID cacheID;
1.143 + generate_bitmap_cache_id(origBitmap, &cacheID);
1.144 +
1.145 + GrResourceKey key;
1.146 + GrTexture* result = ctx->createTexture(params, desc, cacheID,
1.147 + storage.get(), bitmap->width(), &key);
1.148 + if (NULL != result) {
1.149 + add_genID_listener(key, origBitmap.pixelRef());
1.150 + }
1.151 + return result;
1.152 + } else {
1.153 + GrTexture* result = ctx->lockAndRefScratchTexture(desc,
1.154 + GrContext::kExact_ScratchTexMatch);
1.155 + result->writePixels(0, 0, bitmap->width(),
1.156 + bitmap->height(), desc.fConfig,
1.157 + storage.get());
1.158 + return result;
1.159 + }
1.160 + } else {
1.161 + origBitmap.copyTo(&tmpBitmap, kPMColor_SkColorType);
1.162 + // now bitmap points to our temp, which has been promoted to 32bits
1.163 + bitmap = &tmpBitmap;
1.164 + desc.fConfig = SkBitmapConfig2GrPixelConfig(bitmap->config());
1.165 + }
1.166 + }
1.167 +
1.168 + SkAutoLockPixels alp(*bitmap);
1.169 + if (!bitmap->readyToDraw()) {
1.170 + return NULL;
1.171 + }
1.172 + if (cache) {
1.173 + // This texture is likely to be used again so leave it in the cache
1.174 + GrCacheID cacheID;
1.175 + generate_bitmap_cache_id(origBitmap, &cacheID);
1.176 +
1.177 + GrResourceKey key;
1.178 + GrTexture* result = ctx->createTexture(params, desc, cacheID,
1.179 + bitmap->getPixels(), bitmap->rowBytes(), &key);
1.180 + if (NULL != result) {
1.181 + add_genID_listener(key, origBitmap.pixelRef());
1.182 + }
1.183 + return result;
1.184 + } else {
1.185 + // This texture is unlikely to be used again (in its present form) so
1.186 + // just use a scratch texture. This will remove the texture from the
1.187 + // cache so no one else can find it. Additionally, once unlocked, the
1.188 + // scratch texture will go to the end of the list for purging so will
1.189 + // likely be available for this volatile bitmap the next time around.
1.190 + GrTexture* result = ctx->lockAndRefScratchTexture(desc, GrContext::kExact_ScratchTexMatch);
1.191 + result->writePixels(0, 0,
1.192 + bitmap->width(), bitmap->height(),
1.193 + desc.fConfig,
1.194 + bitmap->getPixels(),
1.195 + bitmap->rowBytes());
1.196 + return result;
1.197 + }
1.198 +}
1.199 +
1.200 +bool GrIsBitmapInCache(const GrContext* ctx,
1.201 + const SkBitmap& bitmap,
1.202 + const GrTextureParams* params) {
1.203 + GrCacheID cacheID;
1.204 + generate_bitmap_cache_id(bitmap, &cacheID);
1.205 +
1.206 + GrTextureDesc desc;
1.207 + generate_bitmap_texture_desc(bitmap, &desc);
1.208 + return ctx->isTextureInCache(desc, cacheID, params);
1.209 +}
1.210 +
1.211 +GrTexture* GrLockAndRefCachedBitmapTexture(GrContext* ctx,
1.212 + const SkBitmap& bitmap,
1.213 + const GrTextureParams* params) {
1.214 + GrTexture* result = NULL;
1.215 +
1.216 + bool cache = !bitmap.isVolatile();
1.217 +
1.218 + if (cache) {
1.219 + // If the bitmap isn't changing try to find a cached copy first.
1.220 +
1.221 + GrCacheID cacheID;
1.222 + generate_bitmap_cache_id(bitmap, &cacheID);
1.223 +
1.224 + GrTextureDesc desc;
1.225 + generate_bitmap_texture_desc(bitmap, &desc);
1.226 +
1.227 + result = ctx->findAndRefTexture(desc, cacheID, params);
1.228 + }
1.229 + if (NULL == result) {
1.230 + result = sk_gr_create_bitmap_texture(ctx, cache, params, bitmap);
1.231 + }
1.232 + if (NULL == result) {
1.233 + GrPrintf("---- failed to create texture for cache [%d %d]\n",
1.234 + bitmap.width(), bitmap.height());
1.235 + }
1.236 + return result;
1.237 +}
1.238 +
1.239 +void GrUnlockAndUnrefCachedBitmapTexture(GrTexture* texture) {
1.240 + SkASSERT(NULL != texture->getContext());
1.241 +
1.242 + texture->getContext()->unlockScratchTexture(texture);
1.243 + texture->unref();
1.244 +}
1.245 +
1.246 +///////////////////////////////////////////////////////////////////////////////
1.247 +
1.248 +GrPixelConfig SkBitmapConfig2GrPixelConfig(SkBitmap::Config config) {
1.249 + switch (config) {
1.250 + case SkBitmap::kA8_Config:
1.251 + return kAlpha_8_GrPixelConfig;
1.252 + case SkBitmap::kIndex8_Config:
1.253 + return kIndex_8_GrPixelConfig;
1.254 + case SkBitmap::kRGB_565_Config:
1.255 + return kRGB_565_GrPixelConfig;
1.256 + case SkBitmap::kARGB_4444_Config:
1.257 + return kRGBA_4444_GrPixelConfig;
1.258 + case SkBitmap::kARGB_8888_Config:
1.259 + return kSkia8888_GrPixelConfig;
1.260 + default:
1.261 + // kNo_Config, kA1_Config missing
1.262 + return kUnknown_GrPixelConfig;
1.263 + }
1.264 +}
1.265 +
1.266 +// alphatype is ignore for now, but if GrPixelConfig is expanded to encompass
1.267 +// alpha info, that will be considered.
1.268 +GrPixelConfig SkImageInfo2GrPixelConfig(SkColorType ct, SkAlphaType) {
1.269 + switch (ct) {
1.270 + case kUnknown_SkColorType:
1.271 + return kUnknown_GrPixelConfig;
1.272 + case kAlpha_8_SkColorType:
1.273 + return kAlpha_8_GrPixelConfig;
1.274 + case kRGB_565_SkColorType:
1.275 + return kRGB_565_GrPixelConfig;
1.276 + case kARGB_4444_SkColorType:
1.277 + return kRGBA_4444_GrPixelConfig;
1.278 + case kRGBA_8888_SkColorType:
1.279 + return kRGBA_8888_GrPixelConfig;
1.280 + case kBGRA_8888_SkColorType:
1.281 + return kBGRA_8888_GrPixelConfig;
1.282 + case kIndex_8_SkColorType:
1.283 + return kIndex_8_GrPixelConfig;
1.284 + }
1.285 + SkASSERT(0); // shouldn't get here
1.286 + return kUnknown_GrPixelConfig;
1.287 +}
1.288 +
1.289 +bool GrPixelConfig2ColorType(GrPixelConfig config, SkColorType* ctOut) {
1.290 + SkColorType ct;
1.291 + switch (config) {
1.292 + case kAlpha_8_GrPixelConfig:
1.293 + ct = kAlpha_8_SkColorType;
1.294 + break;
1.295 + case kIndex_8_GrPixelConfig:
1.296 + ct = kIndex_8_SkColorType;
1.297 + break;
1.298 + case kRGB_565_GrPixelConfig:
1.299 + ct = kRGB_565_SkColorType;
1.300 + break;
1.301 + case kRGBA_4444_GrPixelConfig:
1.302 + ct = kARGB_4444_SkColorType;
1.303 + break;
1.304 + case kRGBA_8888_GrPixelConfig:
1.305 + ct = kRGBA_8888_SkColorType;
1.306 + break;
1.307 + case kBGRA_8888_GrPixelConfig:
1.308 + ct = kBGRA_8888_SkColorType;
1.309 + break;
1.310 + default:
1.311 + return false;
1.312 + }
1.313 + if (ctOut) {
1.314 + *ctOut = ct;
1.315 + }
1.316 + return true;
1.317 +}
