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