diff options
Diffstat (limited to 'graphics/transparent_surface.cpp')
| -rw-r--r-- | graphics/transparent_surface.cpp | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/graphics/transparent_surface.cpp b/graphics/transparent_surface.cpp index 19e7655a93..c2903d42c3 100644 --- a/graphics/transparent_surface.cpp +++ b/graphics/transparent_surface.cpp @@ -462,6 +462,139 @@ Common::Rect TransparentSurface::blit(Graphics::Surface &target, int posX, int p return retSize; } +Common::Rect TransparentSurface::blitClip(Graphics::Surface &target, Common::Rect clippingArea, int posX, int posY, int flipping, Common::Rect *pPartRect, uint color, int width, int height, TSpriteBlendMode blendMode) { + Common::Rect retSize; + retSize.top = 0; + retSize.left = 0; + retSize.setWidth(0); + retSize.setHeight(0); + // Check if we need to draw anything at all + int ca = (color >> kAModShift) & 0xff; + + if (ca == 0) { + return retSize; + } + + // Create an encapsulating surface for the data + TransparentSurface srcImage(*this, false); + // TODO: Is the data really in the screen format? + if (format.bytesPerPixel != 4) { + warning("TransparentSurface can only blit 32bpp images, but got %d", format.bytesPerPixel * 8); + return retSize; + } + + if (pPartRect) { + + int xOffset = pPartRect->left; + int yOffset = pPartRect->top; + + if (flipping & FLIP_V) { + yOffset = srcImage.h - pPartRect->bottom; + } + + if (flipping & FLIP_H) { + xOffset = srcImage.w - pPartRect->right; + } + + srcImage.pixels = getBasePtr(xOffset, yOffset); + srcImage.w = pPartRect->width(); + srcImage.h = pPartRect->height(); + + debug(6, "Blit(%d, %d, %d, [%d, %d, %d, %d], %08x, %d, %d)", posX, posY, flipping, + pPartRect->left, pPartRect->top, pPartRect->width(), pPartRect->height(), color, width, height); + } else { + + debug(6, "Blit(%d, %d, %d, [%d, %d, %d, %d], %08x, %d, %d)", posX, posY, flipping, 0, 0, + srcImage.w, srcImage.h, color, width, height); + } + + if (width == -1) { + width = srcImage.w; + } + if (height == -1) { + height = srcImage.h; + } + +#ifdef SCALING_TESTING + // Hardcode scaling to 66% to test scaling + width = width * 2 / 3; + height = height * 2 / 3; +#endif + + Graphics::Surface *img = nullptr; + Graphics::Surface *imgScaled = nullptr; + byte *savedPixels = nullptr; + if ((width != srcImage.w) || (height != srcImage.h)) { + // Scale the image + img = imgScaled = srcImage.scale(width, height); + savedPixels = (byte *)img->getPixels(); + } else { + img = &srcImage; + } + + // Handle off-screen clipping + if (posY < clippingArea.top) { + img->h = MAX(0, (int)img->h - (clippingArea.top - posY)); + img->setPixels((byte *)img->getBasePtr(0, clippingArea.top - posY)); + posY = clippingArea.top; + } + + if (posX < clippingArea.left) { + img->w = MAX(0, (int)img->w - (clippingArea.left - posX)); + img->setPixels((byte *)img->getBasePtr(clippingArea.left - posX, 0)); + posX = clippingArea.left; + } + + img->w = CLIP((int)img->w, 0, (int)MAX((int)clippingArea.right - posX, 0)); + img->h = CLIP((int)img->h, 0, (int)MAX((int)clippingArea.bottom - posY, 0)); + + if ((img->w > 0) && (img->h > 0)) { + int xp = 0, yp = 0; + + int inStep = 4; + int inoStep = img->pitch; + if (flipping & FLIP_H) { + inStep = -inStep; + xp = img->w - 1; + } + + if (flipping & FLIP_V) { + inoStep = -inoStep; + yp = img->h - 1; + } + + byte *ino = (byte *)img->getBasePtr(xp, yp); + byte *outo = (byte *)target.getBasePtr(posX, posY); + + if (color == 0xFFFFFFFF && blendMode == BLEND_NORMAL && _alphaMode == ALPHA_OPAQUE) { + doBlitOpaqueFast(ino, outo, img->w, img->h, target.pitch, inStep, inoStep); + } else if (color == 0xFFFFFFFF && blendMode == BLEND_NORMAL && _alphaMode == ALPHA_BINARY) { + doBlitBinaryFast(ino, outo, img->w, img->h, target.pitch, inStep, inoStep); + } else { + if (blendMode == BLEND_ADDITIVE) { + doBlitAdditiveBlend(ino, outo, img->w, img->h, target.pitch, inStep, inoStep, color); + } else if (blendMode == BLEND_SUBTRACTIVE) { + doBlitSubtractiveBlend(ino, outo, img->w, img->h, target.pitch, inStep, inoStep, color); + } else { + assert(blendMode == BLEND_NORMAL); + doBlitAlphaBlend(ino, outo, img->w, img->h, target.pitch, inStep, inoStep, color); + } + } + + } + + retSize.setWidth(img->w); + retSize.setHeight(img->h); + + if (imgScaled) { + imgScaled->setPixels(savedPixels); + imgScaled->free(); + delete imgScaled; + } + + return retSize; +} + /** * Writes a color key to the alpha channel of the surface * @param rKey the red component of the color key |