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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrTextureAccess.h"
#include "GrColor.h"
#include "GrTexture.h"
GrTextureAccess::GrTextureAccess() {
#ifdef SK_DEBUG
memcpy(fSwizzle, "void", 5);
fSwizzleMask = 0xbeeffeed;
#endif
}
GrTextureAccess::GrTextureAccess(GrTexture* texture, const GrTextureParams& params) {
this->reset(texture, params);
}
GrTextureAccess::GrTextureAccess(GrTexture* texture,
GrTextureParams::FilterMode filterMode,
SkShader::TileMode tileXAndY) {
this->reset(texture, filterMode, tileXAndY);
}
GrTextureAccess::GrTextureAccess(GrTexture* texture,
const char* swizzle,
const GrTextureParams& params) {
this->reset(texture, swizzle, params);
}
GrTextureAccess::GrTextureAccess(GrTexture* texture,
const char* swizzle,
GrTextureParams::FilterMode filterMode,
SkShader::TileMode tileXAndY) {
this->reset(texture, swizzle, filterMode, tileXAndY);
}
void GrTextureAccess::reset(GrTexture* texture,
const char* swizzle,
const GrTextureParams& params) {
SkASSERT(texture);
SkASSERT(strlen(swizzle) >= 1 && strlen(swizzle) <= 4);
fParams = params;
fTexture.set(SkRef(texture), kRead_GrIOType);
this->setSwizzle(swizzle);
}
void GrTextureAccess::reset(GrTexture* texture,
const char* swizzle,
GrTextureParams::FilterMode filterMode,
SkShader::TileMode tileXAndY) {
SkASSERT(texture);
SkASSERT(strlen(swizzle) >= 1 && strlen(swizzle) <= 4);
fParams.reset(tileXAndY, filterMode);
fTexture.set(SkRef(texture), kRead_GrIOType);
this->setSwizzle(swizzle);
}
void GrTextureAccess::reset(GrTexture* texture,
const GrTextureParams& params) {
SkASSERT(texture);
fTexture.set(SkRef(texture), kRead_GrIOType);
fParams = params;
memcpy(fSwizzle, "rgba", 5);
fSwizzleMask = kRGBA_GrColorComponentFlags;
}
void GrTextureAccess::reset(GrTexture* texture,
GrTextureParams::FilterMode filterMode,
SkShader::TileMode tileXAndY) {
SkASSERT(texture);
fTexture.set(SkRef(texture), kRead_GrIOType);
fParams.reset(tileXAndY, filterMode);
memcpy(fSwizzle, "rgba", 5);
fSwizzleMask = kRGBA_GrColorComponentFlags;
}
void GrTextureAccess::setSwizzle(const char* swizzle) {
fSwizzleMask = 0;
memset(fSwizzle, '\0', 5);
for (int i = 0; i < 4 && '\0' != swizzle[i]; ++i) {
fSwizzle[i] = swizzle[i];
switch (swizzle[i]) {
case 'r':
fSwizzleMask |= kR_GrColorComponentFlag;
break;
case 'g':
fSwizzleMask |= kG_GrColorComponentFlag;
break;
case 'b':
fSwizzleMask |= kB_GrColorComponentFlag;
break;
case 'a':
fSwizzleMask |= kA_GrColorComponentFlag;
break;
default:
SkFAIL("Unexpected swizzle string character.");
break;
}
}
}
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