C++ SkIRect::setLTRB方法代码示例

TiledPipeController::TiledPipeController(const SkBitmap& bitmap,
                                         SkPicture::InstallPixelRefProc proc,
                                         const SkMatrix* initial)
: INHERITED(NULL, proc) {
    int32_t top = 0;
    int32_t bottom;
    int32_t height = bitmap.height() / NumberOfTiles;
    SkIRect rect;
    for (int i = 0; i < NumberOfTiles; i++) {
        bottom = i + 1 == NumberOfTiles ? bitmap.height() : top + height;
        rect.setLTRB(0, top, bitmap.width(), bottom);
        top = bottom;

        SkDEBUGCODE(bool extracted = )bitmap.extractSubset(&fBitmaps[i], rect);
        SkASSERT(extracted);
        SkBaseDevice* device = new SkBitmapDevice(fBitmaps[i]);
        SkCanvas* canvas = new SkCanvas(device);
        device->unref();
        if (initial != NULL) {
            canvas->setMatrix(*initial);
        }
        canvas->translate(SkIntToScalar(-rect.left()),
                          SkIntToScalar(-rect.top()));
        if (0 == i) {
            fReader.setCanvas(canvas);
        } else {
            fReaders[i - 1].setCanvas(canvas);
            fReaders[i - 1].setBitmapDecoder(proc);
        }
        canvas->unref();
    }
}

GrTargetCommands::Cmd* GrCommandBuilder::recordClear(const SkIRect* rect,
                                                     GrColor color,
                                                     bool canIgnoreRect,
                                                     GrRenderTarget* renderTarget) {
    SkASSERT(renderTarget);

    SkIRect r;
    if (NULL == rect) {
        // We could do something smart and remove previous draws and clears to
        // the current render target. If we get that smart we have to make sure
        // those draws aren't read before this clear (render-to-texture).
        r.setLTRB(0, 0, renderTarget->width(), renderTarget->height());
        rect = &r;
    }
    Clear* clr = GrNEW_APPEND_TO_RECORDER(*this->cmdBuffer(), Clear, (renderTarget));
    GrColorIsPMAssert(color);
    clr->fColor = color;
    clr->fRect = *rect;
    clr->fCanIgnoreRect = canIgnoreRect;
    return clr;
}

void GrInOrderDrawBuffer::onClear(const SkIRect* rect, GrColor color,
                                  bool canIgnoreRect, GrRenderTarget* renderTarget) {
    SkIRect r;
    if (NULL == renderTarget) {
        renderTarget = this->drawState()->getRenderTarget();
        SkASSERT(renderTarget);
    }
    if (NULL == rect) {
        // We could do something smart and remove previous draws and clears to
        // the current render target. If we get that smart we have to make sure
        // those draws aren't read before this clear (render-to-texture).
        r.setLTRB(0, 0, renderTarget->width(), renderTarget->height());
        rect = &r;
    }
    Clear* clr = GrNEW_APPEND_TO_RECORDER(fCmdBuffer, Clear, (renderTarget));
    GrColorIsPMAssert(color);
    clr->fColor = color;
    clr->fRect = *rect;
    clr->fCanIgnoreRect = canIgnoreRect;
    this->recordTraceMarkersIfNecessary();
}

void GrVkGpuCommandBuffer::onClear(GrRenderTarget* target, const GrFixedClip& clip, GrColor color) {
    // parent class should never let us get here with no RT
    SkASSERT(target);
    SkASSERT(!clip.hasWindowRectangles());

    VkClearColorValue vkColor;
    GrColorToRGBAFloat(color, vkColor.float32);

    GrVkRenderTarget* vkRT = static_cast<GrVkRenderTarget*>(target);

    if (fIsEmpty && !clip.scissorEnabled()) {
        // We will change the render pass to do a clear load instead
        GrVkRenderPass::LoadStoreOps vkColorOps(VK_ATTACHMENT_LOAD_OP_CLEAR,
                                                VK_ATTACHMENT_STORE_OP_STORE);
        GrVkRenderPass::LoadStoreOps vkStencilOps(VK_ATTACHMENT_LOAD_OP_LOAD,
                                                  VK_ATTACHMENT_STORE_OP_STORE);

        const GrVkRenderPass* oldRP = fRenderPass;

        const GrVkResourceProvider::CompatibleRPHandle& rpHandle =
            vkRT->compatibleRenderPassHandle();
        if (rpHandle.isValid()) {
            fRenderPass = fGpu->resourceProvider().findRenderPass(rpHandle,
                                                                  vkColorOps,
                                                                  vkStencilOps);
        } else {
            fRenderPass = fGpu->resourceProvider().findRenderPass(*vkRT,
                                                                  vkColorOps,
                                                                  vkStencilOps);
        }

        SkASSERT(fRenderPass->isCompatible(*oldRP));
        oldRP->unref(fGpu);

        GrColorToRGBAFloat(color, fColorClearValue.color.float32);
        fStartsWithClear = true;
        return;
    }

    // We always do a sub rect clear with clearAttachments since we are inside a render pass
    VkClearRect clearRect;
    // Flip rect if necessary
    SkIRect vkRect;
    if (!clip.scissorEnabled()) {
        vkRect.setXYWH(0, 0, vkRT->width(), vkRT->height());
    } else if (kBottomLeft_GrSurfaceOrigin != vkRT->origin()) {
        vkRect = clip.scissorRect();
    } else {
        const SkIRect& scissor = clip.scissorRect();
        vkRect.setLTRB(scissor.fLeft, vkRT->height() - scissor.fBottom,
                       scissor.fRight, vkRT->height() - scissor.fTop);
    }
    clearRect.rect.offset = { vkRect.fLeft, vkRect.fTop };
    clearRect.rect.extent = { (uint32_t)vkRect.width(), (uint32_t)vkRect.height() };
    clearRect.baseArrayLayer = 0;
    clearRect.layerCount = 1;

    uint32_t colorIndex;
    SkAssertResult(fRenderPass->colorAttachmentIndex(&colorIndex));

    VkClearAttachment attachment;
    attachment.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
    attachment.colorAttachment = colorIndex;
    attachment.clearValue.color = vkColor;

    fCommandBuffer->clearAttachments(fGpu, 1, &attachment, 1, &clearRect);
    fIsEmpty = false;
    return;
}