Skia side RGB to YUV gpu conversion
This code is the one that's currently working in my local chromium build. A few things still need to be addressed and I'll highlight these directly in the code.
BUG=skia:
R=reed@google.com, bsalomon@google.com, senorblanco@google.com, senorblanco@chromium.org, robertphillips@google.com, scroggo@google.com, halcanary@google.com
Author: sugoi@chromium.org
Review URL: https://codereview.chromium.org/374743003
diff --git a/src/gpu/SkGr.cpp b/src/gpu/SkGr.cpp
index c4e2c1f..5c0464d 100644
--- a/src/gpu/SkGr.cpp
+++ b/src/gpu/SkGr.cpp
@@ -15,6 +15,7 @@
#include "GrGpu.h"
#include "effects/GrDitherEffect.h"
#include "GrDrawTargetCaps.h"
+#include "effects/GrYUVtoRGBEffect.h"
#ifndef SK_IGNORE_ETC1_SUPPORT
# include "ktx.h"
@@ -193,6 +194,81 @@
}
#endif // SK_IGNORE_ETC1_SUPPORT
+static GrTexture *load_yuv_texture(GrContext* ctx, const GrTextureParams* params,
+ const SkBitmap& bm, const GrTextureDesc& desc) {
+ GrTexture* result = NULL;
+
+ SkPixelRef* pixelRef = bm.pixelRef();
+ SkISize yuvSizes[3];
+ if ((NULL == pixelRef) || !pixelRef->getYUV8Planes(yuvSizes, NULL, NULL)) {
+ return NULL;
+ }
+
+ // Allocate the memory for YUV
+ size_t totalSize(0);
+ size_t sizes[3], rowBytes[3];
+ for (int i = 0; i < 3; ++i) {
+ rowBytes[i] = yuvSizes[i].fWidth;
+ totalSize += sizes[i] = rowBytes[i] * yuvSizes[i].fHeight;
+ }
+ SkAutoMalloc storage(totalSize);
+ void* planes[3];
+ planes[0] = storage.get();
+ planes[1] = (uint8_t*)planes[0] + sizes[0];
+ planes[2] = (uint8_t*)planes[1] + sizes[1];
+
+ // Get the YUV planes
+ if (!pixelRef->getYUV8Planes(yuvSizes, planes, rowBytes)) {
+ return NULL;
+ }
+
+ GrTextureDesc yuvDesc;
+ yuvDesc.fConfig = kAlpha_8_GrPixelConfig;
+ GrAutoScratchTexture yuvTextures[3];
+ for (int i = 0; i < 3; ++i) {
+ yuvDesc.fWidth = yuvSizes[i].fWidth;
+ yuvDesc.fHeight = yuvSizes[i].fHeight;
+ yuvTextures[i].set(ctx, yuvDesc);
+ if ((NULL == yuvTextures[i].texture()) ||
+ !ctx->writeTexturePixels(yuvTextures[i].texture(),
+ 0, 0, yuvDesc.fWidth, yuvDesc.fHeight,
+ yuvDesc.fConfig, planes[i], rowBytes[i])) {
+ return NULL;
+ }
+ }
+
+ GrTextureDesc rtDesc = desc;
+ rtDesc.fFlags = rtDesc.fFlags |
+ kRenderTarget_GrTextureFlagBit |
+ kNoStencil_GrTextureFlagBit;
+
+ // This texture is likely to be used again so leave it in the cache
+ GrCacheID cacheID;
+ generate_bitmap_cache_id(bm, &cacheID);
+
+ GrResourceKey key;
+ result = ctx->createTexture(params, rtDesc, cacheID, NULL, 0, &key);
+ GrRenderTarget* renderTarget = result ? result->asRenderTarget() : NULL;
+ if (NULL != renderTarget) {
+ add_genID_listener(key, bm.pixelRef());
+ SkAutoTUnref<GrEffect> yuvToRgbEffect(GrYUVtoRGBEffect::Create(
+ yuvTextures[0].texture(), yuvTextures[1].texture(), yuvTextures[2].texture()));
+ GrPaint paint;
+ paint.addColorEffect(yuvToRgbEffect);
+ SkRect r = SkRect::MakeWH(SkIntToScalar(yuvSizes[0].fWidth),
+ SkIntToScalar(yuvSizes[0].fHeight));
+ GrContext::AutoRenderTarget autoRT(ctx, renderTarget);
+ GrContext::AutoMatrix am;
+ am.setIdentity(ctx);
+ GrContext::AutoClip ac(ctx, GrContext::AutoClip::kWideOpen_InitialClip);
+ ctx->drawRect(paint, r);
+ } else {
+ SkSafeSetNull(result);
+ }
+
+ return result;
+}
+
static GrTexture* sk_gr_create_bitmap_texture(GrContext* ctx,
bool cache,
const GrTextureParams* params,
@@ -264,6 +340,12 @@
}
#endif // SK_IGNORE_ETC1_SUPPORT
+ else {
+ GrTexture *texture = load_yuv_texture(ctx, params, *bitmap, desc);
+ if (NULL != texture) {
+ return texture;
+ }
+ }
SkAutoLockPixels alp(*bitmap);
if (!bitmap->readyToDraw()) {
return NULL;