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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrTextureParamsAdjuster.h"
#include "GrCaps.h"
#include "GrContext.h"
#include "GrDrawContext.h"
#include "GrGpu.h"
#include "GrGpuResourcePriv.h"
#include "GrResourceKey.h"
#include "GrTexture.h"
#include "GrTextureParams.h"
#include "GrTextureProvider.h"
#include "SkCanvas.h"
#include "SkGr.h"
#include "SkGrPriv.h"
#include "effects/GrTextureDomain.h"
typedef GrTextureProducer::CopyParams CopyParams;
//////////////////////////////////////////////////////////////////////////////
static GrTexture* copy_on_gpu(GrTexture* inputTexture, const SkIRect* subset,
const CopyParams& copyParams) {
SkASSERT(!subset || !subset->isEmpty());
GrContext* context = inputTexture->getContext();
SkASSERT(context);
const GrCaps* caps = context->caps();
// Either it's a cache miss or the original wasn't cached to begin with.
GrSurfaceDesc rtDesc = inputTexture->desc();
rtDesc.fFlags = rtDesc.fFlags | kRenderTarget_GrSurfaceFlag;
rtDesc.fWidth = copyParams.fWidth;
rtDesc.fHeight = copyParams.fHeight;
rtDesc.fConfig = GrMakePixelConfigUncompressed(rtDesc.fConfig);
// If the config isn't renderable try converting to either A8 or an 32 bit config. Otherwise,
// fail.
if (!caps->isConfigRenderable(rtDesc.fConfig, false)) {
if (GrPixelConfigIsAlphaOnly(rtDesc.fConfig)) {
if (caps->isConfigRenderable(kAlpha_8_GrPixelConfig, false)) {
rtDesc.fConfig = kAlpha_8_GrPixelConfig;
} else if (caps->isConfigRenderable(kSkia8888_GrPixelConfig, false)) {
rtDesc.fConfig = kSkia8888_GrPixelConfig;
} else {
return nullptr;
}
} else if (kRGB_GrColorComponentFlags ==
(kRGB_GrColorComponentFlags & GrPixelConfigComponentMask(rtDesc.fConfig))) {
if (caps->isConfigRenderable(kSkia8888_GrPixelConfig, false)) {
rtDesc.fConfig = kSkia8888_GrPixelConfig;
} else {
return nullptr;
}
} else {
return nullptr;
}
}
SkAutoTUnref<GrTexture> copy(context->textureProvider()->createTexture(rtDesc, true));
if (!copy) {
return nullptr;
}
// TODO: If no scaling is being performed then use copySurface.
GrPaint paint;
SkScalar sx;
SkScalar sy;
if (subset) {
sx = 1.f / inputTexture->width();
sy = 1.f / inputTexture->height();
}
if (copyParams.fFilter != GrTextureParams::kNone_FilterMode && subset &&
(subset->width() != copyParams.fWidth || subset->height() != copyParams.fHeight)) {
SkRect domain;
domain.fLeft = (subset->fLeft + 0.5f) * sx;
domain.fTop = (subset->fTop + 0.5f)* sy;
domain.fRight = (subset->fRight - 0.5f) * sx;
domain.fBottom = (subset->fBottom - 0.5f) * sy;
// This would cause us to read values from outside the subset. Surely, the caller knows
// better!
SkASSERT(copyParams.fFilter != GrTextureParams::kMipMap_FilterMode);
paint.addColorFragmentProcessor(
GrTextureDomainEffect::Create(inputTexture, SkMatrix::I(), domain,
GrTextureDomain::kClamp_Mode,
copyParams.fFilter))->unref();
} else {
GrTextureParams params(SkShader::kClamp_TileMode, copyParams.fFilter);
paint.addColorTextureProcessor(inputTexture, SkMatrix::I(), params);
}
SkRect localRect;
if (subset) {
localRect = SkRect::Make(*subset);
localRect.fLeft *= sx;
localRect.fTop *= sy;
localRect.fRight *= sx;
localRect.fBottom *= sy;
} else {
localRect = SkRect::MakeWH(1.f, 1.f);
}
SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(copy->asRenderTarget()));
if (!drawContext) {
return nullptr;
}
SkRect dstRect = SkRect::MakeWH(SkIntToScalar(rtDesc.fWidth), SkIntToScalar(rtDesc.fHeight));
drawContext->fillRectToRect(GrClip::WideOpen(), paint, SkMatrix::I(), dstRect, localRect);
return copy.detach();
}
GrTextureAdjuster::GrTextureAdjuster(GrTexture* original, const SkIRect& contentArea)
: fOriginal(original) {
if (contentArea.fLeft > 0 || contentArea.fTop > 0 ||
contentArea.fRight < original->width() || contentArea.fBottom < original->height()) {
fContentArea.set(contentArea);
}
}
GrTexture* GrTextureAdjuster::refTextureSafeForParams(const GrTextureParams& params,
SkIPoint* outOffset) {
GrTexture* texture = this->originalTexture();
GrContext* context = texture->getContext();
CopyParams copyParams;
const SkIRect* contentArea = this->contentArea();
if (contentArea && GrTextureParams::kMipMap_FilterMode == params.filterMode()) {
// If we generate a MIP chain for texture it will read pixel values from outside the content
// area.
copyParams.fWidth = contentArea->width();
copyParams.fHeight = contentArea->height();
copyParams.fFilter = GrTextureParams::kBilerp_FilterMode;
} else if (!context->getGpu()->makeCopyForTextureParams(texture->width(), texture->height(),
params, ©Params)) {
if (outOffset) {
if (contentArea) {
outOffset->set(contentArea->fLeft, contentArea->fRight);
} else {
outOffset->set(0, 0);
}
}
return SkRef(texture);
}
GrUniqueKey key;
this->makeCopyKey(copyParams, &key);
if (key.isValid()) {
GrTexture* result = context->textureProvider()->findAndRefTextureByUniqueKey(key);
if (result) {
return result;
}
}
GrTexture* result = copy_on_gpu(texture, contentArea, copyParams);
if (result) {
if (key.isValid()) {
result->resourcePriv().setUniqueKey(key);
this->didCacheCopy(key);
}
if (outOffset) {
outOffset->set(0, 0);
}
}
return result;
}
//////////////////////////////////////////////////////////////////////////////
GrTexture* GrTextureMaker::refTextureForParams(GrContext* ctx, const GrTextureParams& params) {
CopyParams copyParams;
if (!ctx->getGpu()->makeCopyForTextureParams(this->width(), this->height(), params,
©Params)) {
return this->refOriginalTexture(ctx);
}
GrUniqueKey copyKey;
this->makeCopyKey(copyParams, ©Key);
if (copyKey.isValid()) {
GrTexture* result = ctx->textureProvider()->findAndRefTextureByUniqueKey(copyKey);
if (result) {
return result;
}
}
GrTexture* result = this->generateTextureForParams(ctx, copyParams);
if (!result) {
return nullptr;
}
if (copyKey.isValid()) {
ctx->textureProvider()->assignUniqueKeyToTexture(copyKey, result);
this->didCacheCopy(copyKey);
}
return result;
}
GrTexture* GrTextureMaker::generateTextureForParams(GrContext* ctx, const CopyParams& copyParams) {
SkAutoTUnref<GrTexture> original(this->refOriginalTexture(ctx));
if (!original) {
return nullptr;
}
return copy_on_gpu(original, nullptr, copyParams);
}
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