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Add a fast path for RGBA images to convert_image_to_surface()

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Most common case in Aseprite where we convert
a IMAGE_RGB doc::Image into a 32bpp she::Surface
and all RGBA masks/shifts match.
This commit is contained in:
David Capello 2018-06-22 15:56:50 -03:00
parent 511752fea7
commit 33369c0a5f
1 changed files with 16 additions and 1 deletions
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17
src/doc/conversion_she.cpp
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@ -1,5 +1,5 @@
// Aseprite Document Library
// Copyright (c) 2001-2016 David Capello
// Copyright (c) 2001-2018 David Capello
//
// This file is released under the terms of the MIT license.
// Read LICENSE.txt for more information.
@ -19,6 +19,7 @@
#include "she/surface.h"
#include "she/surface_format.h"
#include <algorithm>
#include <stdexcept>
namespace doc {
@ -162,6 +163,20 @@ void convert_image_to_surface(const Image* image, const Palette* palette,
switch (image->pixelFormat()) {
case IMAGE_RGB:
// Fast path
if (gfx::ColorRShift == fd.redShift &&
gfx::ColorGShift == fd.greenShift &&
gfx::ColorBShift == fd.blueShift &&
gfx::ColorAShift == fd.alphaShift) {
for (int v=0; v<h; ++v, ++src_y, ++dst_y) {
uint8_t* src_address = image->getPixelAddress(src_x, src_y);
uint8_t* dst_address = surface->getData(dst_x, dst_y);
std::copy(src_address,
src_address + RgbTraits::bytes_per_pixel * w,
dst_address);
}
return;
}
convert_image_to_surface_selector<RgbTraits>(image, surface, src_x, src_y, dst_x, dst_y, w, h, palette, &fd);
break;