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Added utility function imageSwizzleBGRA8 to convert RGBA8 image to BGRA8.

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This commit is contained in:
bkaradzic 2013-08-14 23:19:12 -07:00
parent dfd17b1d79
commit 691c6c7f67
3 changed files with 70 additions and 20 deletions
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3
include/bgfx.h
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@ -511,6 +511,9 @@ namespace bgfx
///
void vertexConvert(const VertexDecl& _destDecl, void* _destData, const VertexDecl& _srcDecl, const void* _srcData, uint32_t _num = 1);
/// Swizzle RGBA8 image to BGRA8.
void imageSwizzleBGRA8(uint8_t* _rgbaData, uint32_t _width, uint32_t _height);
/// Returns renderer backend API type.
RendererType::Enum getRendererType();

63
src/image.cpp Normal file
View file

@ -0,0 +1,63 @@
/*
* Copyright 2011-2013 Branimir Karadzic. All rights reserved.
* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
#include <bx/float4_t.h>
namespace bgfx
{
static void imageSwizzleBGRA8Ref(uint8_t* _rgbaData, uint32_t _width, uint32_t _height)
{
uint32_t dstpitch = _width*4;
for (uint32_t yy = 0; yy < _height; ++yy)
{
uint8_t* dst = &_rgbaData[yy*dstpitch];
for (uint32_t xx = 0; xx < _width; ++xx)
{
uint8_t tmp = dst[0];
dst[0] = dst[2];
dst[2] = tmp;
dst += 4;
}
}
}
void imageSwizzleBGRA8(uint8_t* _rgbaData, uint32_t _width, uint32_t _height)
{
if (0 != (_width&0xf)
|| _width < 16)
{
imageSwizzleBGRA8Ref(_rgbaData, _width, _height);
return;
}
uint32_t dstpitch = _width*4;
uint32_t num = dstpitch/16;
using namespace bx;
const float4_t mf0f0 = float4_isplat(0xff00ff00);
const float4_t m0f0f = float4_isplat(0x00ff00ff);
for (uint32_t yy = 0; yy < _height; ++yy)
{
uint8_t* ptr = &_rgbaData[yy*dstpitch];
for (uint32_t xx = 0; xx < num; ++xx)
{
const float4_t tabgr = float4_ld(ptr);
const float4_t t00ab = float4_srl(tabgr, 16);
const float4_t tgr00 = float4_sll(tabgr, 16);
const float4_t tgrab = float4_or(t00ab, tgr00);
const float4_t ta0g0 = float4_and(tabgr, mf0f0);
const float4_t t0g0b = float4_and(tgrab, m0f0f);
const float4_t targb = float4_or(ta0g0, t0g0b);
float4_st(ptr, targb);
ptr += 16;
}
}
}
} // namespace bgfx

24
src/renderer_gl.cpp
View file

@ -9,6 +9,7 @@
# include "renderer_gl.h"
# include <bx/timer.h>
# include <bx/uint32_t.h>
# include <bx/float4_t.h>
namespace bgfx
{
@ -375,23 +376,6 @@ namespace bgfx
typedef void (*PostSwapBuffersFn)(uint32_t _width, uint32_t _height);
static void rgbaToBgra(uint8_t* _data, uint32_t _width, uint32_t _height)
{
uint32_t dstpitch = _width*4;
for (uint32_t yy = 0; yy < _height; ++yy)
{
uint8_t* dst = &_data[yy*dstpitch];
for (uint32_t xx = 0; xx < _width; ++xx)
{
uint8_t tmp = dst[0];
dst[0] = dst[2];
dst[2] = tmp;
dst += 4;
}
}
}
static const char* getGLString(GLenum _name)
{
const char* str = (const char*)glGetString(_name);
@ -775,7 +759,7 @@ namespace bgfx
if (GL_RGBA == fmt)
{
rgbaToBgra(data, width, height);
imageSwizzleBGRA8(data, width, height);
}
g_callback->screenShot(_filePath
@ -1472,7 +1456,7 @@ namespace bgfx
if (swizzle)
{
rgbaToBgra(bits, width, height);
imageSwizzleBGRA8(bits, width, height);
}
texImage(target+side
@ -1621,7 +1605,7 @@ namespace bgfx
if (NULL != data
&& swizzle)
{
rgbaToBgra(data, width, height);
imageSwizzleBGRA8(data, width, height);
}
texImage(target+side