GrGpu.cpp File Reference

#include "src/gpu/ganesh/GrGpu.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTextureCompressionType.h"
#include "include/gpu/GrBackendSemaphore.h"
#include "include/gpu/GrBackendSurface.h"
#include "include/gpu/GrDirectContext.h"
#include "include/private/base/SkTo.h"
#include "src/base/SkMathPriv.h"
#include "src/core/SkCompressedDataUtils.h"
#include "src/core/SkTraceEvent.h"
#include "src/gpu/RefCntedCallback.h"
#include "src/gpu/ganesh/GrBackendUtils.h"
#include "src/gpu/ganesh/GrCaps.h"
#include "src/gpu/ganesh/GrDirectContextPriv.h"
#include "src/gpu/ganesh/GrGpuBuffer.h"
#include "src/gpu/ganesh/GrGpuResourcePriv.h"
#include "src/gpu/ganesh/GrRenderTarget.h"
#include "src/gpu/ganesh/GrResourceProvider.h"
#include "src/gpu/ganesh/GrRingBuffer.h"
#include "src/gpu/ganesh/GrSemaphore.h"
#include "src/gpu/ganesh/GrStagingBufferManager.h"
#include "src/gpu/ganesh/GrSurface.h"
#include "src/gpu/ganesh/GrTexture.h"
#include <algorithm>
#include <utility>

Go to the source code of this file.

Functions
static bool	validate_texel_levels (SkISize dimensions, GrColorType texelColorType, const GrMipLevel *texels, int mipLevelCount, const GrCaps *caps)

Function Documentation

validate_texel_levels()

static bool validate_texel_levels ( SkISize  dimensions, GrColorType  texelColorType, const GrMipLevel *  texels, int  mipLevelCount, const GrCaps *  caps  )

static

Definition at line 55 of file GrGpu.cpp.

                                                                                                   {
    SkASSERT(mipLevelCount > 0);
    bool hasBasePixels = texels[0].fPixels;
    int levelsWithPixelsCnt = 0;
    auto bpp = GrColorTypeBytesPerPixel(texelColorType);
    int w = dimensions.fWidth;
    int h = dimensions.fHeight;
    for (int currentMipLevel = 0; currentMipLevel < mipLevelCount; ++currentMipLevel) {
        if (texels[currentMipLevel].fPixels) {
            const size_t minRowBytes = w * bpp;
            if (caps->writePixelsRowBytesSupport()) {
                if (texels[currentMipLevel].fRowBytes < minRowBytes) {
                    return false;
                }
                if (texels[currentMipLevel].fRowBytes % bpp) {
                    return false;
                }
            } else {
                if (texels[currentMipLevel].fRowBytes != minRowBytes) {
                    return false;
                }
            }
            ++levelsWithPixelsCnt;
        }
        if (w == 1 && h == 1) {
            if (currentMipLevel != mipLevelCount - 1) {
                return false;
            }
        } else {
            w = std::max(w / 2, 1);
            h = std::max(h / 2, 1);
        }
    }
    // Either just a base layer or a full stack is required.
    if (mipLevelCount != 1 && (w != 1 || h != 1)) {
        return false;
    }
    // Can specify just the base, all levels, or no levels.
    if (!hasBasePixels) {
        return levelsWithPixelsCnt == 0;
    }
    return levelsWithPixelsCnt == 1 || levelsWithPixelsCnt == mipLevelCount;
}