C++ GrPrintf函数代码示例

void GrDrawTarget::setBlendFunc(GrBlendCoeff srcCoeff,
                                GrBlendCoeff dstCoeff) {
    fCurrDrawState.fSrcBlend = srcCoeff;
    fCurrDrawState.fDstBlend = dstCoeff;
#if GR_DEBUG
    switch (dstCoeff) {
    case kDC_BlendCoeff:
    case kIDC_BlendCoeff:
    case kDA_BlendCoeff:
    case kIDA_BlendCoeff:
        GrPrintf("Unexpected dst blend coeff. Won't work correctly with"
                 "coverage stages.\n");
        break;
    default:
        break;
    }
    switch (srcCoeff) {
    case kSC_BlendCoeff:
    case kISC_BlendCoeff:
    case kSA_BlendCoeff:
    case kISA_BlendCoeff:
        GrPrintf("Unexpected src blend coeff. Won't work correctly with"
                 "coverage stages.\n");
        break;
    default:
        break;
    }
#endif
}

GrGLuint GrGLProgram::CompileShader(GrGLenum type,
                                      int stringCnt,
                                      const char** strings,
                                      int* stringLengths) {
    GrGLuint shader = GR_GL(CreateShader(type));
    if (0 == shader) {
        return 0;
    }

    GrGLint compiled = GR_GL_INIT_ZERO;
    GR_GL(ShaderSource(shader, stringCnt, strings, stringLengths));
    GR_GL(CompileShader(shader));
    GR_GL(GetShaderiv(shader, GR_GL_COMPILE_STATUS, &compiled));

    if (!compiled) {
        GrGLint infoLen = GR_GL_INIT_ZERO;
        GR_GL(GetShaderiv(shader, GR_GL_INFO_LOG_LENGTH, &infoLen));
        GrAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger
        if (infoLen > 0) {
            GR_GL(GetShaderInfoLog(shader, infoLen+1, NULL, (char*)log.get()));
            for (int i = 0; i < stringCnt; ++i) {
                if (NULL == stringLengths || stringLengths[i] < 0) {
                    GrPrintf(strings[i]);
                } else {
                    GrPrintf("%.*s", stringLengths[i], strings[i]);
                }
            }
            GrPrintf("\n%s", log.get());
        }
        GrAssert(!"Shader compilation failed!");
        GR_GL(DeleteShader(shader));
        return 0;
    }
    return shader;
}

void GrGLCaps::print() const {
    for (int i = 0; i < fStencilFormats.count(); ++i) {
        GrPrintf("Stencil Format %d, stencil bits: %02d, total bits: %02d\n",
                 i,
                 fStencilFormats[i].fStencilBits,
                 fStencilFormats[i].fTotalBits);
    }

    GR_STATIC_ASSERT(0 == kNone_MSFBOType);
    GR_STATIC_ASSERT(1 == kDesktopARB_MSFBOType);
    GR_STATIC_ASSERT(2 == kDesktopEXT_MSFBOType);
    GR_STATIC_ASSERT(3 == kAppleES_MSFBOType);
    static const char* gMSFBOExtStr[] = {
        "None",
        "ARB",
        "EXT",
        "Apple",
    };
    GrPrintf("MSAA Type: %s\n", gMSFBOExtStr[fMSFBOType]);
    GrPrintf("Max FS Uniform Vectors: %d\n", fMaxFragmentUniformVectors);
    GrPrintf("Support RGBA8 Render Buffer: %s\n",
             (fRGBA8RenderbufferSupport ? "YES": "NO"));
    GrPrintf("BGRA is an internal format: %s\n",
             (fBGRAIsInternalFormat ? "YES": "NO"));
    GrPrintf("Support texture swizzle: %s\n",
             (fTextureSwizzleSupport ? "YES": "NO"));
    GrPrintf("Unpack Row length support: %s\n",
             (fUnpackRowLengthSupport ? "YES": "NO"));
    GrPrintf("Unpack Flip Y support: %s\n",
             (fUnpackFlipYSupport ? "YES": "NO"));
    GrPrintf("Pack Row length support: %s\n",
             (fPackRowLengthSupport ? "YES": "NO"));
    GrPrintf("Pack Flip Y support: %s\n",
             (fPackFlipYSupport ? "YES": "NO"));
}

// Compiles a GL shader and attaches it to a program. Returns the shader ID if
// successful, or 0 if not.
static GrGLuint attach_shader(const GrGLContext& glCtx,
                              GrGLuint programId,
                              GrGLenum type,
                              const SkString& shaderSrc) {
    const GrGLInterface* gli = glCtx.interface();

    GrGLuint shaderId;
    GR_GL_CALL_RET(gli, shaderId, CreateShader(type));
    if (0 == shaderId) {
        return 0;
    }

    const GrGLchar* sourceStr = shaderSrc.c_str();
    GrGLint sourceLength = static_cast<GrGLint>(shaderSrc.size());
    GR_GL_CALL(gli, ShaderSource(shaderId, 1, &sourceStr, &sourceLength));
    GR_GL_CALL(gli, CompileShader(shaderId));

    // Calling GetShaderiv in Chromium is quite expensive. Assume success in release builds.
    bool checkCompiled = !glCtx.isChromium();
#ifdef SK_DEBUG
    checkCompiled = true;
#endif
    if (checkCompiled) {
        GrGLint compiled = GR_GL_INIT_ZERO;
        GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_COMPILE_STATUS, &compiled));

        if (!compiled) {
            GrGLint infoLen = GR_GL_INIT_ZERO;
            GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_INFO_LOG_LENGTH, &infoLen));
            SkAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger
            if (infoLen > 0) {
                // retrieve length even though we don't need it to workaround bug in Chromium cmd
                // buffer param validation.
                GrGLsizei length = GR_GL_INIT_ZERO;
                GR_GL_CALL(gli, GetShaderInfoLog(shaderId, infoLen+1,
                                                 &length, (char*)log.get()));
                GrPrintf(shaderSrc.c_str());
                GrPrintf("\n%s", log.get());
            }
            SkDEBUGFAIL("Shader compilation failed!");
            GR_GL_CALL(gli, DeleteShader(shaderId));
            return 0;
        }
    }

    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("skia.gpu"), "skia_gpu::GLShader",
                         TRACE_EVENT_SCOPE_THREAD, "shader", TRACE_STR_COPY(shaderSrc.c_str()));
    if (c_PrintShaders) {
        GrPrintf(shaderSrc.c_str());
        GrPrintf("\n");
    }

    // Attach the shader, but defer deletion until after we have linked the program.
    // This works around a bug in the Android emulator's GLES2 wrapper which
    // will immediately delete the shader object and free its memory even though it's
    // attached to a program, which then causes glLinkProgram to fail.
    GR_GL_CALL(gli, AttachShader(programId, shaderId));

    return shaderId;
}

// Compiles a GL shader, attaches it to a program, and releases the shader's reference.
// (That way there's no need to hang on to the GL shader id and delete it later.)
static bool attach_shader(const GrGLContext& glCtx,
                          GrGLuint programId,
                          GrGLenum type,
                          const SkString& shaderSrc) {
    const GrGLInterface* gli = glCtx.interface();

    GrGLuint shaderId;
    GR_GL_CALL_RET(gli, shaderId, CreateShader(type));
    if (0 == shaderId) {
        return false;
    }

    const GrGLchar* sourceStr = shaderSrc.c_str();
    GrGLint sourceLength = static_cast<GrGLint>(shaderSrc.size());
    GR_GL_CALL(gli, ShaderSource(shaderId, 1, &sourceStr, &sourceLength));
    GR_GL_CALL(gli, CompileShader(shaderId));

    // Calling GetShaderiv in Chromium is quite expensive. Assume success in release builds.
    bool checkCompiled = !glCtx.info().isChromium();
#ifdef SK_DEBUG
    checkCompiled = true;
#endif
    if (checkCompiled) {
        GrGLint compiled = GR_GL_INIT_ZERO;
        GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_COMPILE_STATUS, &compiled));

        if (!compiled) {
            GrGLint infoLen = GR_GL_INIT_ZERO;
            GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_INFO_LOG_LENGTH, &infoLen));
            SkAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger
            if (infoLen > 0) {
                // retrieve length even though we don't need it to workaround bug in Chromium cmd
                // buffer param validation.
                GrGLsizei length = GR_GL_INIT_ZERO;
                GR_GL_CALL(gli, GetShaderInfoLog(shaderId, infoLen+1,
                                                 &length, (char*)log.get()));
                GrPrintf(shaderSrc.c_str());
                GrPrintf("\n%s", log.get());
            }
            SkDEBUGFAIL("Shader compilation failed!");
            GR_GL_CALL(gli, DeleteShader(shaderId));
            return false;
        }
    }
    if (c_PrintShaders) {
        GrPrintf(shaderSrc.c_str());
        GrPrintf("\n");
    }

    GR_GL_CALL(gli, AttachShader(programId, shaderId));
    GR_GL_CALL(gli, DeleteShader(shaderId));
    return true;
}

void GrGLCheckErr(const char* location, const char* call) {
    uint32_t err =  GrGLGetGLInterface()->fGetError();
    if (GR_GL_NO_ERROR != err) {
        GrPrintf("---- glGetError %x", err);
        if (NULL != location) {
            GrPrintf(" at\n\t%s", location);
        }
        if (NULL != call) {
            GrPrintf("\n\t\t%s", call);
        }
        GrPrintf("\n");
    }
}

void GrAARectRenderer::fillAARect(GrGpu* gpu,
                                  GrDrawTarget* target,
                                  const GrRect& devRect,
                                  bool useVertexCoverage) {
    GrVertexLayout layout = aa_rect_layout(useVertexCoverage);

    size_t vsize = GrDrawState::VertexSize(layout);

    GrDrawTarget::AutoReleaseGeometry geo(target, layout, 8, 0);
    if (!geo.succeeded()) {
        GrPrintf("Failed to get space for vertices!\n");
        return;
    }

    GrIndexBuffer* indexBuffer = this->aaFillRectIndexBuffer(gpu);
    if (NULL == indexBuffer) {
        GrPrintf("Failed to create index buffer!\n");
        return;
    }

    intptr_t verts = reinterpret_cast<intptr_t>(geo.vertices());

    GrPoint* fan0Pos = reinterpret_cast<GrPoint*>(verts);
    GrPoint* fan1Pos = reinterpret_cast<GrPoint*>(verts + 4 * vsize);

    set_inset_fan(fan0Pos, vsize, devRect, -SK_ScalarHalf, -SK_ScalarHalf);
    set_inset_fan(fan1Pos, vsize, devRect,  SK_ScalarHalf,  SK_ScalarHalf);

    verts += sizeof(GrPoint);
    for (int i = 0; i < 4; ++i) {
        *reinterpret_cast<GrColor*>(verts + i * vsize) = 0;
    }

    GrColor innerColor;
    if (useVertexCoverage) {
        innerColor = 0xffffffff;
    } else {
        innerColor = target->getDrawState().getColor();
    }

    verts += 4 * vsize;
    for (int i = 0; i < 4; ++i) {
        *reinterpret_cast<GrColor*>(verts + i * vsize) = innerColor;
    }

    target->setIndexSourceToBuffer(indexBuffer);
    target->drawIndexedInstances(kTriangles_GrPrimitiveType, 1,
                                 kVertsPerAAFillRect,
                                 kIndicesPerAAFillRect);
}

void GrGLCheckErr(const GrGLInterface* gl,
                  const char* location,
                  const char* call) {
    uint32_t err = GR_GL_GET_ERROR(gl);
    if (GR_GL_NO_ERROR != err) {
        GrPrintf("---- glGetError 0x%x(%s)", err, get_error_string(err));
        if (NULL != location) {
            GrPrintf(" at\n\t%s", location);
        }
        if (NULL != call) {
            GrPrintf("\n\t\t%s", call);
        }
        GrPrintf("\n");
    }
}

GrTexture* GrLockCachedBitmapTexture(GrContext* ctx,
                                     const SkBitmap& bitmap,
                                     const GrTextureParams* params) {
    GrTexture* result = NULL;

    if (!bitmap.isVolatile()) {
        // If the bitmap isn't changing try to find a cached copy first
        uint64_t key = bitmap.getGenerationID();
        key |= ((uint64_t) bitmap.pixelRefOffset()) << 32;

        GrTextureDesc desc;
        desc.fWidth = bitmap.width();
        desc.fHeight = bitmap.height();
        desc.fConfig = SkBitmapConfig2GrPixelConfig(bitmap.config());

        GrCacheData cacheData(key);

        result = ctx->findAndLockTexture(desc, cacheData, params);
        if (NULL == result) {
            result = sk_gr_create_bitmap_texture(ctx, key, params, bitmap);
        }
    } else {
        result = sk_gr_create_bitmap_texture(ctx, GrCacheData::kScratch_CacheID, params, bitmap);
    }
    if (NULL == result) {
        GrPrintf("---- failed to create texture for cache [%d %d]\n",
                    bitmap.width(), bitmap.height());
    }
    return result;
}

GrGpu* GrGpu::Create(GrBackend backend, GrBackendContext backendContext, GrContext* context) {

    const GrGLInterface* glInterface = NULL;
    SkAutoTUnref<const GrGLInterface> glInterfaceUnref;

    if (kOpenGL_GrBackend == backend) {
        glInterface = reinterpret_cast<const GrGLInterface*>(backendContext);
        if (NULL == glInterface) {
            glInterface = GrGLDefaultInterface();
            // By calling GrGLDefaultInterface we've taken a ref on the
            // returned object. We only want to hold that ref until after
            // the GrGpu is constructed and has taken ownership.
            glInterfaceUnref.reset(glInterface);
        }
        if (NULL == glInterface) {
#ifdef SK_DEBUG
            GrPrintf("No GL interface provided!\n");
#endif
            return NULL;
        }
        GrGLContext ctx(glInterface);
        if (ctx.isInitialized()) {
            return SkNEW_ARGS(GrGpuGL, (ctx, context));
        }
    }
    return NULL;
}

bool GrGLShaderBuilder::finish() {
    SkASSERT(0 == fOutput.fProgramID);
    GL_CALL_RET(fOutput.fProgramID, CreateProgram());
    if (!fOutput.fProgramID) {
        return false;
    }

    SkTDArray<GrGLuint> shadersToDelete;

    if (!this->compileAndAttachShaders(fOutput.fProgramID, &shadersToDelete)) {
        GL_CALL(DeleteProgram(fOutput.fProgramID));
        return false;
    }

    this->bindProgramLocations(fOutput.fProgramID);
    if (fUniformManager->isUsingBindUniform()) {
        fUniformManager->getUniformLocations(fOutput.fProgramID, fUniforms);
    }

    GL_CALL(LinkProgram(fOutput.fProgramID));

    // Calling GetProgramiv is expensive in Chromium. Assume success in release builds.
    bool checkLinked = !fGpu->ctxInfo().isChromium();
#ifdef SK_DEBUG
    checkLinked = true;
#endif
    if (checkLinked) {
        GrGLint linked = GR_GL_INIT_ZERO;
        GL_CALL(GetProgramiv(fOutput.fProgramID, GR_GL_LINK_STATUS, &linked));
        if (!linked) {
            GrGLint infoLen = GR_GL_INIT_ZERO;
            GL_CALL(GetProgramiv(fOutput.fProgramID, GR_GL_INFO_LOG_LENGTH, &infoLen));
            SkAutoMalloc log(sizeof(char)*(infoLen+1));  // outside if for debugger
            if (infoLen > 0) {
                // retrieve length even though we don't need it to workaround
                // bug in chrome cmd buffer param validation.
                GrGLsizei length = GR_GL_INIT_ZERO;
                GL_CALL(GetProgramInfoLog(fOutput.fProgramID,
                                          infoLen+1,
                                          &length,
                                          (char*)log.get()));
                GrPrintf((char*)log.get());
            }
            SkDEBUGFAIL("Error linking program");
            GL_CALL(DeleteProgram(fOutput.fProgramID));
            fOutput.fProgramID = 0;
            return false;
        }
    }

    if (!fUniformManager->isUsingBindUniform()) {
        fUniformManager->getUniformLocations(fOutput.fProgramID, fUniforms);
    }

    for (int i = 0; i < shadersToDelete.count(); ++i) {
      GL_CALL(DeleteShader(shadersToDelete[i]));
    }

    return true;
}

void GrResourceCache::addResource(const GrResourceKey& key,
                                  GrResource* resource,
                                  uint32_t ownershipFlags) {
    GrAssert(NULL == resource->getCacheEntry());
    // we don't expect to create new resources during a purge. In theory
    // this could cause purgeAsNeeded() into an infinite loop (e.g.
    // each resource destroyed creates and locks 2 resources and
    // unlocks 1 thereby causing a new purge).
    GrAssert(!fPurging);
    GrAutoResourceCacheValidate atcv(this);

    GrResourceEntry* entry = SkNEW_ARGS(GrResourceEntry, (key, resource));
    resource->setCacheEntry(entry);

    this->attachToHead(entry);
    fCache.insert(key, entry);

#if GR_DUMP_TEXTURE_UPLOAD
    GrPrintf("--- add resource to cache %p, count=%d bytes= %d %d\n",
             entry, fEntryCount, resource->sizeInBytes(), fEntryBytes);
#endif

    if (ownershipFlags & kHide_OwnershipFlag) {
        this->makeExclusive(entry);
    }

}

GrTexture* GrLockAndRefCachedBitmapTexture(GrContext* ctx,
                                           const SkBitmap& bitmap,
                                           const GrTextureParams* params) {
    GrTexture* result = NULL;

    bool cache = !bitmap.isVolatile();

    if (cache) {
        // If the bitmap isn't changing try to find a cached copy first.

        GrCacheID cacheID;
        generate_bitmap_cache_id(bitmap, &cacheID);

        GrTextureDesc desc;
        generate_bitmap_texture_desc(bitmap, &desc);

        result = ctx->findAndRefTexture(desc, cacheID, params);
    }
    if (NULL == result) {
        result = sk_gr_create_bitmap_texture(ctx, cache, params, bitmap);
    }
    if (NULL == result) {
        GrPrintf("---- failed to create texture for cache [%d %d]\n",
                    bitmap.width(), bitmap.height());
    }
    return result;
}

void GrDrawTarget::onDrawRect(const SkRect& rect,
                              const SkMatrix* matrix,
                              const SkRect* localRect,
                              const SkMatrix* localMatrix) {

    GrDrawState::AutoViewMatrixRestore avmr;
    if (NULL != matrix) {
        avmr.set(this->drawState(), *matrix);
    }

    set_vertex_attributes(this->drawState(), NULL != localRect);

    AutoReleaseGeometry geo(this, 4, 0);
    if (!geo.succeeded()) {
        GrPrintf("Failed to get space for vertices!\n");
        return;
    }

    size_t vsize = this->drawState()->getVertexSize();
    geo.positions()->setRectFan(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, vsize);
    if (NULL != localRect) {
        SkPoint* coords = GrTCast<SkPoint*>(GrTCast<intptr_t>(geo.vertices()) +
                                            sizeof(SkPoint));
        coords->setRectFan(localRect->fLeft, localRect->fTop,
                           localRect->fRight, localRect->fBottom,
                           vsize);
        if (NULL != localMatrix) {
            localMatrix->mapPointsWithStride(coords, vsize, 4);
        }
    }
    SkRect bounds;
    this->getDrawState().getViewMatrix().mapRect(&bounds, rect);

    this->drawNonIndexed(kTriangleFan_GrPrimitiveType, 0, 4, &bounds);
}

void GrBitmapTextContext::flushGlyphs() {
    if (NULL == fDrawTarget) {
        return;
    }

    GrDrawState* drawState = fDrawTarget->drawState();
    GrDrawState::AutoRestoreEffects are(drawState);
    drawState->setFromPaint(fPaint, SkMatrix::I(), fContext->getRenderTarget());

    if (fCurrVertex > 0) {
        // setup our sampler state for our text texture/atlas
        SkASSERT(SkIsAlign4(fCurrVertex));
        SkASSERT(fCurrTexture);
        GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kNone_FilterMode);

        // This effect could be stored with one of the cache objects (atlas?)
        drawState->addCoverageEffect(
                                GrCustomCoordsTextureEffect::Create(fCurrTexture, params),
                                kGlyphCoordsAttributeIndex)->unref();

        if (NULL != fStrike && kARGB_GrMaskFormat == fStrike->getMaskFormat()) {
            drawState->setBlendFunc(fPaint.getSrcBlendCoeff(), fPaint.getDstBlendCoeff());
            drawState->setColor(0xffffffff);
        } else if (!GrPixelConfigIsAlphaOnly(fCurrTexture->config())) {
            if (kOne_GrBlendCoeff != fPaint.getSrcBlendCoeff() ||
                kISA_GrBlendCoeff != fPaint.getDstBlendCoeff() ||
                fPaint.numColorStages()) {
                GrPrintf("LCD Text will not draw correctly.\n");
            }
            // We don't use the GrPaint's color in this case because it's been premultiplied by
            // alpha. Instead we feed in a non-premultiplied color, and multiply its alpha by
            // the mask texture color. The end result is that we get
            //            mask*paintAlpha*paintColor + (1-mask*paintAlpha)*dstColor
            int a = SkColorGetA(fSkPaint.getColor());
            // paintAlpha
            drawState->setColor(SkColorSetARGB(a, a, a, a));
            // paintColor
            drawState->setBlendConstant(skcolor_to_grcolor_nopremultiply(fSkPaint.getColor()));
            drawState->setBlendFunc(kConstC_GrBlendCoeff, kISC_GrBlendCoeff);
        } else {
            // set back to normal in case we took LCD path previously.
            drawState->setBlendFunc(fPaint.getSrcBlendCoeff(), fPaint.getDstBlendCoeff());
            drawState->setColor(fPaint.getColor());
        }

        int nGlyphs = fCurrVertex / 4;
        fDrawTarget->setIndexSourceToBuffer(fContext->getQuadIndexBuffer());
        fDrawTarget->drawIndexedInstances(kTriangles_GrPrimitiveType,
                                          nGlyphs,
                                          4, 6, &fVertexBounds);

        fDrawTarget->resetVertexSource();
        fVertices = NULL;
        fMaxVertices = 0;
        fCurrVertex = 0;
        fVertexBounds.setLargestInverted();
        SkSafeSetNull(fCurrTexture);
    }
}