diff options
Diffstat (limited to 'source/Irrlicht/CSoftwareTexture2.cpp')
| -rw-r--r-- | source/Irrlicht/CSoftwareTexture2.cpp | 610 |
1 files changed, 531 insertions, 79 deletions
diff --git a/source/Irrlicht/CSoftwareTexture2.cpp b/source/Irrlicht/CSoftwareTexture2.cpp index 44a7e6b..b17e462 100644 --- a/source/Irrlicht/CSoftwareTexture2.cpp +++ b/source/Irrlicht/CSoftwareTexture2.cpp @@ -9,6 +9,7 @@ #include "SoftwareDriver2_helper.h"
#include "CSoftwareTexture2.h"
#include "CSoftwareDriver2.h"
+#include "CBlit.h"
#include "os.h"
namespace irr
@@ -16,125 +17,204 @@ namespace irr namespace video
{
+//! stretches srcRect src to dstRect dst, applying a sliding window box filter in linear color space (sRGB->linear->sRGB)
+void Resample_subSampling(eBlitter op, video::IImage* dst, const core::rect<s32>* dstRect, const video::IImage* src, const core::rect<s32>* srcRect, size_t flags);
+
//! constructor
-CSoftwareTexture2::CSoftwareTexture2(IImage* image, const io::path& name, u32 flags)
- : ITexture(name, ETT_2D), MipMapLOD(0), Flags ( flags ), OriginalFormat(video::ECF_UNKNOWN)
+CSoftwareTexture2::CSoftwareTexture2(IImage* image, const io::path& name, u32 flags, CBurningVideoDriver* driver)
+ : ITexture(name
+#if !defined(PATCH_SUPERTUX_8_0_1_with_1_9_0)
+ , ETT_2D
+#endif
+ )
+ ,MipMapLOD(0), Flags(flags), Driver(driver)
{
#ifdef _DEBUG
setDebugName("CSoftwareTexture2");
#endif
#ifndef SOFTWARE_DRIVER_2_MIPMAPPING
- Flags &= ~GEN_MIPMAP;
+ Flags &= ~(GEN_MIPMAP| GEN_MIPMAP_AUTO);
#endif
-
+ //set baseclass properties
DriverType = EDT_BURNINGSVIDEO;
ColorFormat = BURNINGSHADER_COLOR_FORMAT;
IsRenderTarget = (Flags & IS_RENDERTARGET) != 0;
-
- memset32 ( MipMap, 0, sizeof ( MipMap ) );
-
- if (image)
+ HasMipMaps = (Flags & GEN_MIPMAP) != 0;
+ MipMap0_Area[0] = 1;
+ MipMap0_Area[1] = 1;
+ LodBIAS = 0.75f;
+ for ( size_t i = 0; i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i ) MipMap[i] = 0;
+ if (!image) return;
+
+ OriginalSize = image->getDimension();
+ OriginalColorFormat = image->getColorFormat();
+
+
+#if defined(IRRLICHT_sRGB)
+ if ( Flags & IMAGE_IS_LINEAR ) image->set_sRGB(0);
+#else
+ //guessing linear image
+ if (name.find("light") >= 0 ||
+ name.find("bump") >= 0 ||
+ name.find("height") >= 0
+ )
{
- bool IsCompressed = false;
-
- if (IImage::isCompressedFormat(image->getColorFormat()))
- {
- os::Printer::log("Texture compression not available.", ELL_ERROR);
- IsCompressed = true;
- }
-
- OriginalSize = image->getDimension();
- OriginalFormat = image->getColorFormat();
-
- core::dimension2d<u32> optSize(
- OriginalSize.getOptimalSize(0 != (Flags & NP2_SIZE),
- false, true,
- SOFTWARE_DRIVER_2_TEXTURE_MAXSIZE)
- );
+ Flags |= TEXTURE_IS_LINEAR | IMAGE_IS_LINEAR;
+ }
+#endif
- if (OriginalSize == optSize)
- {
- MipMap[0] = new CImage(BURNINGSHADER_COLOR_FORMAT, image->getDimension());
+ bool isCompressed = IImage::isCompressedFormat(OriginalColorFormat);
+ if (isCompressed)
+ {
+ os::Printer::log("Texture compression not available.", ELL_ERROR);
+ }
- if (!IsCompressed)
- image->copyTo(MipMap[0]);
- }
- else
+ //visual studio code warning
+ u32 maxTexSize = SOFTWARE_DRIVER_2_TEXTURE_MAXSIZE;
+ core::dimension2d<u32> optSize( OriginalSize.getOptimalSize(
+ (Flags & ALLOW_NPOT) ? 0 : 1, // requirePowerOfTwo
+ false, // requireSquare
+ (Flags & ALLOW_NPOT) ? 1 : maxTexSize == 0, // larger
+ (Flags & ALLOW_NPOT) ? 0 : maxTexSize // maxValue
+ )
+ );
+
+ if (OriginalSize == optSize)
+ {
+ MipMap[0] = new CImage(BURNINGSHADER_COLOR_FORMAT, image->getDimension());
+#if defined(IRRLICHT_sRGB)
+ MipMap[0]->set_sRGB( (Flags & TEXTURE_IS_LINEAR ) ? 0 : image->get_sRGB() );
+#endif
+ if (!isCompressed)
+ image->copyTo(MipMap[0]);
+ }
+ else
+ {
+ char buf[256];
+ core::stringw showName ( name );
+ snprintf_irr ( buf, sizeof(buf), "Burningvideo: Warning Texture %ls reformat %ux%u,%d -> %ux%u,%d",
+ showName.c_str(),
+ OriginalSize.Width, OriginalSize.Height, OriginalColorFormat,
+ optSize.Width, optSize.Height,BURNINGSHADER_COLOR_FORMAT
+ );
+
+ os::Printer::log ( buf, ELL_WARNING );
+ MipMap[0] = new CImage(BURNINGSHADER_COLOR_FORMAT, optSize);
+#if defined(IRRLICHT_sRGB)
+ MipMap[0]->set_sRGB( (Flags & TEXTURE_IS_LINEAR ) ? 0 : image->get_sRGB() );
+#endif
+ if (!isCompressed)
{
- char buf[256];
- core::stringw showName ( name );
- snprintf_irr ( buf, 256, "Burningvideo: Warning Texture %ls reformat %dx%d -> %dx%d,%d",
- showName.c_str(),
- OriginalSize.Width, OriginalSize.Height, optSize.Width, optSize.Height,
- BURNINGSHADER_COLOR_FORMAT
- );
-
- OriginalSize = optSize;
- os::Printer::log ( buf, ELL_WARNING );
- MipMap[0] = new CImage(BURNINGSHADER_COLOR_FORMAT, optSize);
-
- if (!IsCompressed)
- image->copyToScalingBoxFilter ( MipMap[0],0, false );
+ //image->copyToScalingBoxFilter ( MipMap[0],0, false );
+ Resample_subSampling(BLITTER_TEXTURE,MipMap[0],0,image,0, Flags);
}
-
- Size = MipMap[MipMapLOD]->getDimension();
- Pitch = MipMap[MipMapLOD]->getPitch();
-
- OrigImageDataSizeInPixels = (f32) 0.3f * MipMap[0]->getImageDataSizeInPixels();
-
- HasMipMaps = (Flags & GEN_MIPMAP) != 0;
-
- regenerateMipMapLevels(image->getMipMapsData());
+ // if Original Size is used for calculation ( 2D position, font) it will be wrong
+ //OriginalSize = optSize;
}
+
+ //select highest mipmap 0
+ regenerateMipMapLevels(image->getMipMapsData());
}
//! destructor
CSoftwareTexture2::~CSoftwareTexture2()
{
- for ( s32 i = 0; i!= SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i )
+ for ( size_t i = 0; i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i )
{
if ( MipMap[i] )
+ {
MipMap[i]->drop();
+ MipMap[i] = 0;
+ }
}
}
+
//! Regenerates the mip map levels of the texture. Useful after locking and
//! modifying the texture
+#if !defined(PATCH_SUPERTUX_8_0_1_with_1_9_0)
void CSoftwareTexture2::regenerateMipMapLevels(void* data, u32 layer)
+#else
+void CSoftwareTexture2::regenerateMipMapLevels(void* data)
+#endif
{
- if (!hasMipMaps())
- return;
-
- s32 i;
+ int i;
// release
for ( i = 1; i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i )
{
if ( MipMap[i] )
+ {
MipMap[i]->drop();
+ MipMap[i] = 0;
+ }
}
core::dimension2d<u32> newSize;
- core::dimension2d<u32> origSize = Size;
- for (i=1; i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i)
+ if (HasMipMaps && ( (Flags & GEN_MIPMAP_AUTO) || 0 == data ) )
{
- newSize = MipMap[i-1]->getDimension();
- newSize.Width = core::s32_max ( 1, newSize.Width >> SOFTWARE_DRIVER_2_MIPMAPPING_SCALE );
- newSize.Height = core::s32_max ( 1, newSize.Height >> SOFTWARE_DRIVER_2_MIPMAPPING_SCALE );
- origSize.Width = core::s32_max(1, origSize.Width >> 1);
- origSize.Height = core::s32_max(1, origSize.Height >> 1);
+ //need memory also if autogen mipmap disabled
+ for (i = 1; i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i)
+ {
+ const core::dimension2du& upperDim = MipMap[i - 1]->getDimension();
+ //isotropic
+ newSize.Width = core::s32_max(SOFTWARE_DRIVER_2_MIPMAPPING_MIN_SIZE, upperDim.Width >> 1);
+ newSize.Height = core::s32_max(SOFTWARE_DRIVER_2_MIPMAPPING_MIN_SIZE, upperDim.Height >> 1);
+ if (upperDim == newSize)
+ break;
- if (data)
+ MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize);
+#if defined(IRRLICHT_sRGB)
+ MipMap[i]->set_sRGB(MipMap[i - 1]->get_sRGB());
+#endif
+ //MipMap[i]->fill ( 0xFFFF4040 );
+ //MipMap[i-1]->copyToScalingBoxFilter( MipMap[i], 0, false );
+ Resample_subSampling(BLITTER_TEXTURE, MipMap[i], 0, MipMap[0], 0, Flags);
+ }
+ }
+ else if (HasMipMaps && data)
+ {
+ //deactivated outside mipdata until TA knows how to handle this.
+
+ //query mipmap dimension
+ u8* mip_current = (u8*)data;
+ const u8* mip_end = (u8*)data;
+
+ core::dimension2d<u32> origSize = OriginalSize;
+ i = 1;
+ do
{
- if (OriginalFormat != BURNINGSHADER_COLOR_FORMAT)
+ if (origSize.Width > 1) origSize.Width >>= 1;
+ if (origSize.Height > 1) origSize.Height >>= 1;
+ mip_end += IImage::getDataSizeFromFormat(OriginalColorFormat, origSize.Width, origSize.Height);
+ i += 1;
+ } while ((origSize.Width != 1 || origSize.Height != 1) && i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX);
+
+ //TODO: this is not true
+ LodBIAS = i*0.75f;
+
+ origSize = OriginalSize;
+ for (i = 1; i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX && mip_current < mip_end; ++i)
+ {
+ const core::dimension2du& upperDim = MipMap[i - 1]->getDimension();
+ //isotropic
+ newSize.Width = core::s32_max(SOFTWARE_DRIVER_2_MIPMAPPING_MIN_SIZE, upperDim.Width >> 1);
+ newSize.Height = core::s32_max(SOFTWARE_DRIVER_2_MIPMAPPING_MIN_SIZE, upperDim.Height >> 1);
+ if (upperDim == newSize)
+ break;
+
+ if (origSize.Width > 1) origSize.Width >>= 1;
+ if (origSize.Height > 1) origSize.Height >>= 1;
+
+ if (OriginalColorFormat != BURNINGSHADER_COLOR_FORMAT)
{
- IImage* tmpImage = new CImage(OriginalFormat, origSize, data, true, false);
+ IImage* tmpImage = new CImage(OriginalColorFormat, origSize, mip_current, true, false);
MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize);
- if (origSize==newSize)
+ if (origSize == newSize)
tmpImage->copyTo(MipMap[i]);
else
tmpImage->copyToScalingBoxFilter(MipMap[i]);
@@ -142,33 +222,121 @@ void CSoftwareTexture2::regenerateMipMapLevels(void* data, u32 layer) }
else
{
- if (origSize==newSize)
- MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize, data, false);
+ if (origSize == newSize)
+ MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize, mip_current, false);
else
{
MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize);
- IImage* tmpImage = new CImage(BURNINGSHADER_COLOR_FORMAT, origSize, data, true, false);
+ IImage* tmpImage = new CImage(BURNINGSHADER_COLOR_FORMAT, origSize, mip_current, true, false);
tmpImage->copyToScalingBoxFilter(MipMap[i]);
tmpImage->drop();
}
}
- data = (u8*)data +origSize.getArea()*IImage::getBitsPerPixelFromFormat(OriginalFormat)/8;
+ mip_current += IImage::getDataSizeFromFormat(OriginalColorFormat, origSize.Width, origSize.Height);
}
- else
+ }
+
+
+ //visualize mipmap
+ for (i=1; i < 0 && i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i)
+ {
+/*
+ static u32 color[] = {
+ 0x30bf7f00,0x3040bf00,0x30bf00bf,0x3000bf00,
+ 0x300080bf,0x30bf4000,0x300040bf,0x307f00bf,
+ 0x30bf0000,0x3000bfbf,0x304000bf,0x307fbf00,
+ 0x8000bf7f,0x80bf0040,0x80bfbf00,0x800000bf
+ };
+*/
+ static u32 color[] = {
+ 0xFFFFFFFF,0xFFFF0000,0xFF00FF00,0xFF0000FF,
+ 0xFFFFFF00,0xFF00FFFF,0xFFFF00FF,0xFF0000FF,
+ 0xFF0000FF,0xFF0000FF,0xFF0000FF,0xFF0000FF,
+ 0xFF0000FF,0xFF0000FF,0xFF0000FF,0xFFFF00FF
+ };
+
+ if ( MipMap[i] )
{
- MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize);
+ core::rect<s32> p (core::position2di(0,0),MipMap[i]->getDimension());
+ SColor c((color[i & 15] & 0x00FFFFFF) | 0xFF000000);
+ Blit(BLITTER_TEXTURE_ALPHA_COLOR_BLEND, MipMap[i], 0, 0, MipMap[i], &p, c.color);
+ }
+ }
- //static u32 color[] = { 0, 0xFFFF0000, 0xFF00FF00,0xFF0000FF,0xFFFFFF00,0xFFFF00FF,0xFF00FFFF,0xFF0F0F0F };
- MipMap[i]->fill ( 0 );
- MipMap[0]->copyToScalingBoxFilter( MipMap[i], 0, false );
+ //save mipmap chain
+ if ( 0 )
+ {
+ char buf[256];
+ const char* name = getName().getPath().c_str();
+ int filename = 0;
+ //int ext = -1;
+ i = 0;
+ while (name[i])
+ {
+ if (name[i] == '/' || name[i] == '\\') filename = i + 1;
+ //if (name[i] == '.') ext = i;
+ i += 1;
+ }
+ for (i = 0; i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i)
+ {
+ if (MipMap[i])
+ {
+ snprintf_irr(buf, sizeof(buf),"mip/%s_%02d.png", name + filename,i);
+ Driver->writeImageToFile(MipMap[i], buf);
+ }
}
}
+
+ calcDerivative();
+}
+
+void CSoftwareTexture2::calcDerivative()
+{
+ //reset current MipMap
+ MipMapLOD = 0;
+ if (MipMap[0])
+ {
+ const core::dimension2du& dim = MipMap[0]->getDimension();
+ MipMap0_Area[0] = dim.Width;
+ MipMap0_Area[1] = dim.Height; // screensize of a triangle
+
+ Size = dim; // MipMap[MipMapLOD]->getDimension();
+ Pitch = MipMap[MipMapLOD]->getPitch();
+ }
+
+ //preCalc mipmap texel center boundaries
+ for ( s32 i = 0; i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i )
+ {
+ CSoftwareTexture2_Bound& b = TexBound[i];
+ if (MipMap[i])
+ {
+ const core::dimension2du& dim = MipMap[i]->getDimension();
+ //f32 u = 1.f / dim.Width;
+ //f32 v = 1.f / dim.Height;
+
+ b.w = dim.Width - 1.f;
+ b.h = dim.Height - 1.f;
+ b.cx = 0.f; //u*0.005f;
+ b.cy = 0.f; //v*0.005f;
+ }
+ else
+ {
+ b.w = 0.f;
+ b.h = 0.f;
+ b.cx = 0.f;
+ b.cy = 0.f;
+ }
+ }
+
}
/* Software Render Target 2 */
CSoftwareRenderTarget2::CSoftwareRenderTarget2(CBurningVideoDriver* driver) : Driver(driver)
+#if defined(PATCH_SUPERTUX_8_0_1_with_1_9_0)
+, IRenderTarget(0)
+#endif
{
DriverType = EDT_BURNINGSVIDEO;
@@ -216,6 +384,290 @@ ITexture* CSoftwareRenderTarget2::getTexture() const }
+
+static const float srgb_8bit_to_linear_float[1 << 8] = {
+ 0.0f, 3.03527e-4f, 6.07054e-4f, 9.10581e-4f,
+ 0.001214108f, 0.001517635f, 0.001821162f, 0.0021246888f,
+ 0.002428216f, 0.002731743f, 0.00303527f, 0.0033465358f,
+ 0.0036765074f, 0.004024717f, 0.004391442f, 0.0047769537f,
+ 0.005181517f, 0.005605392f, 0.0060488335f, 0.006512091f,
+ 0.0069954107f, 0.007499032f, 0.008023193f, 0.008568126f,
+ 0.009134059f, 0.009721218f, 0.010329823f, 0.010960095f,
+ 0.011612245f, 0.012286489f, 0.0129830325f, 0.013702083f,
+ 0.014443845f, 0.015208516f, 0.015996294f, 0.016807377f,
+ 0.017641956f, 0.018500222f, 0.019382363f, 0.020288564f,
+ 0.021219011f, 0.022173885f, 0.023153368f, 0.024157634f,
+ 0.025186861f, 0.026241222f, 0.027320893f, 0.02842604f,
+ 0.029556835f, 0.030713445f, 0.031896032f, 0.033104766f,
+ 0.034339808f, 0.035601314f, 0.036889452f, 0.038204372f,
+ 0.039546236f, 0.0409152f, 0.04231141f, 0.04373503f,
+ 0.045186203f, 0.046665087f, 0.048171826f, 0.049706567f,
+ 0.051269464f, 0.05286065f, 0.05448028f, 0.056128494f,
+ 0.057805438f, 0.059511244f, 0.06124606f, 0.06301002f,
+ 0.06480327f, 0.066625945f, 0.068478175f, 0.0703601f,
+ 0.07227185f, 0.07421357f, 0.07618539f, 0.07818743f,
+ 0.08021983f, 0.082282715f, 0.084376216f, 0.086500466f,
+ 0.08865559f, 0.09084172f, 0.093058966f, 0.09530747f,
+ 0.097587354f, 0.09989873f, 0.10224174f, 0.10461649f,
+ 0.107023105f, 0.10946172f, 0.111932434f, 0.11443538f,
+ 0.11697067f, 0.119538434f, 0.122138776f, 0.12477182f,
+ 0.12743768f, 0.13013647f, 0.13286832f, 0.13563333f,
+ 0.13843162f, 0.14126329f, 0.14412847f, 0.14702727f,
+ 0.14995979f, 0.15292616f, 0.15592647f, 0.15896083f,
+ 0.16202939f, 0.1651322f, 0.1682694f, 0.17144111f,
+ 0.1746474f, 0.17788842f, 0.18116425f, 0.18447499f,
+ 0.18782078f, 0.19120169f, 0.19461784f, 0.19806932f,
+ 0.20155625f, 0.20507874f, 0.20863687f, 0.21223076f,
+ 0.21586053f, 0.21952623f, 0.22322798f, 0.2269659f,
+ 0.23074007f, 0.23455061f, 0.2383976f, 0.24228115f,
+ 0.24620135f, 0.2501583f, 0.25415212f, 0.25818288f,
+ 0.2622507f, 0.26635563f, 0.27049783f, 0.27467734f,
+ 0.2788943f, 0.28314877f, 0.28744087f, 0.29177067f,
+ 0.2961383f, 0.3005438f, 0.30498734f, 0.30946895f,
+ 0.31398875f, 0.3185468f, 0.32314324f, 0.32777813f,
+ 0.33245155f, 0.33716366f, 0.34191445f, 0.3467041f,
+ 0.35153264f, 0.35640016f, 0.36130682f, 0.36625263f,
+ 0.3712377f, 0.37626216f, 0.38132605f, 0.38642946f,
+ 0.3915725f, 0.39675525f, 0.4019778f, 0.40724024f,
+ 0.41254264f, 0.4178851f, 0.4232677f, 0.42869052f,
+ 0.43415368f, 0.4396572f, 0.44520122f, 0.45078582f,
+ 0.45641103f, 0.46207702f, 0.4677838f, 0.4735315f,
+ 0.4793202f, 0.48514995f, 0.4910209f, 0.496933f,
+ 0.5028865f, 0.50888133f, 0.5149177f, 0.5209956f,
+ 0.52711517f, 0.53327644f, 0.5394795f, 0.5457245f,
+ 0.55201143f, 0.55834043f, 0.5647115f, 0.57112485f,
+ 0.57758045f, 0.58407843f, 0.59061885f, 0.5972018f,
+ 0.60382736f, 0.61049557f, 0.6172066f, 0.62396044f,
+ 0.63075715f, 0.6375969f, 0.6444797f, 0.65140563f,
+ 0.65837485f, 0.66538733f, 0.67244315f, 0.6795425f,
+ 0.6866853f, 0.6938718f, 0.7011019f, 0.7083758f,
+ 0.71569353f, 0.7230551f, 0.73046076f, 0.73791045f,
+ 0.74540424f, 0.7529422f, 0.7605245f, 0.76815116f,
+ 0.7758222f, 0.7835378f, 0.791298f, 0.7991027f,
+ 0.8069523f, 0.8148466f, 0.82278574f, 0.8307699f,
+ 0.838799f, 0.8468732f, 0.8549926f, 0.8631572f,
+ 0.8713671f, 0.8796224f, 0.8879231f, 0.8962694f,
+ 0.9046612f, 0.91309863f, 0.92158186f, 0.9301109f,
+ 0.9386857f, 0.9473065f, 0.9559733f, 0.9646863f,
+ 0.9734453f, 0.9822506f, 0.9911021f, 1.0f,
+};
+/*
+int linear_to_srgb_8bit(const float x) {
+ if (x <= 0.f) return 0;
+ if (x >= 1.f) return 255;
+ const float *table = SRGB_8BIT_TO_LINEAR_FLOAT;
+ int y = 0;
+ for (int i = 128; i != 0; i >>= 1) {
+ if (table[y + i] <= x)
+ y += i;
+ }
+ if (x - table[y] <= table[y + 1] - x)
+ return y;
+ else
+ return y + 1;
+}
+*/
+
+
+u32 linear_to_srgb_8bit(const float v)
+{
+ ieee754 c;
+ c.f = v;
+ const register size_t x = c.u;
+ const u32 *table = (u32*)srgb_8bit_to_linear_float;
+ register u32 y = 0;
+ y += table[y + 128] <= x ? 128 : 0;
+ y += table[y + 64] <= x ? 64 : 0;
+ y += table[y + 32] <= x ? 32 : 0;
+ y += table[y + 16] <= x ? 16 : 0;
+ y += table[y + 8] <= x ? 8 : 0;
+ y += table[y + 4] <= x ? 4 : 0;
+ y += table[y + 2] <= x ? 2 : 0;
+ y += table[y + 1] <= x ? 1 : 0;
+
+ return y;
+}
+
+// 2D Region half open [x0;x1[
+struct absrect2
+{
+ s32 x0;
+ s32 y0;
+ s32 x1;
+ s32 y1;
+};
+
+static inline int clipTest(absrect2 &o, const core::rect<s32>* a, const absrect2& b)
+{
+ if (a == 0)
+ {
+ o.x0 = b.x0;
+ o.y0 = b.y0;
+ o.x1 = b.x1;
+ o.y1 = b.y1;
+ }
+ else
+ {
+ o.x0 = core::s32_max(a->UpperLeftCorner.X, b.x0);
+ o.x1 = core::s32_min(a->LowerRightCorner.X, b.x1);
+ o.y0 = core::s32_max(a->UpperLeftCorner.Y, b.y0);
+ o.y1 = core::s32_min(a->LowerRightCorner.Y, b.y1);
+ }
+ int clipTest = 0;
+ clipTest |= o.x0 >= o.x1 ? 1 : 0;
+ clipTest |= o.y0 >= o.y1 ? 2 : 0;
+ return clipTest;
+}
+
+//! stretches srcRect src to dstRect dst, applying a sliding window box filter in linear color space (sRGB->linear->sRGB)
+// todo: texture jumps (mip selection problem)
+void Resample_subSampling(eBlitter op, video::IImage* dst, const core::rect<s32>* dstRect,
+ const video::IImage* src, const core::rect<s32>* srcRect,size_t flags)
+{
+ const absrect2 dst_clip = { 0,0,(s32)dst->getDimension().Width,(s32)dst->getDimension().Height };
+ absrect2 dc;
+ if (clipTest(dc, dstRect, dst_clip)) return;
+ const video::ECOLOR_FORMAT dstFormat = dst->getColorFormat();
+ u8* dstData = (u8*)dst->getData();
+
+ const absrect2 src_clip = { 0,0,(s32)src->getDimension().Width,(s32)src->getDimension().Height };
+ absrect2 sc;
+ if (clipTest(sc, srcRect, src_clip)) return;
+ const video::ECOLOR_FORMAT srcFormat = src->getColorFormat();
+ const u8* srcData = (u8*)src->getData();
+
+#if defined(IRRLICHT_sRGB)
+ const int dst_sRGB = dst->get_sRGB();
+ const int src_sRGB = src->get_sRGB();
+#else
+ const int dst_sRGB = (flags & CSoftwareTexture2::TEXTURE_IS_LINEAR) ? 0 : 1;
+ const int src_sRGB = (flags & CSoftwareTexture2::IMAGE_IS_LINEAR) ? 0 : 1;
+#endif
+
+
+
+ float scale[2];
+ scale[0] = (float)(sc.x1 - sc.x0) / (float)(dc.x1 - dc.x0);
+ scale[1] = (float)(sc.y1 - sc.y0) / (float)(dc.y1 - dc.y0);
+ const float rs = 1.f / (scale[0] * scale[1]);
+
+ float sum[4];
+ u32 sbgra = 0;
+
+ float f[4];
+ int fi[4];
+ f[3] = (float)sc.y0;
+ for (int dy = dc.y0; dy < dc.y1; ++dy)
+ {
+ f[1] = f[3];
+ f[3] = sc.y0 + (dy + 1 - dc.y0)*scale[1];
+ if (f[3] >= sc.y1) f[3] = sc.y1 - 0.001f; //todo:1.f/dim should be enough
+
+ f[2] = (float)sc.x0;
+ for (int dx = dc.x0; dx < dc.x1; ++dx)
+ {
+ f[0] = f[2];
+ f[2] = sc.x0 + (dx + 1 - dc.x0)*scale[0];
+ if (f[2] >= sc.x1) f[2] = sc.x1 - 0.001f;
+
+ //accumulate linear color
+ sum[0] = 0.f;
+ sum[1] = 0.f;
+ sum[2] = 0.f;
+ sum[3] = 0.f;
+
+ //sample border
+ fi[0] = (int)(f[0]);
+ fi[1] = (int)(f[1]);
+ fi[2] = (int)(f[2]);
+ fi[3] = (int)(f[3]);
+
+ float w[2];
+ for (int fy = fi[1]; fy <= fi[3]; ++fy)
+ {
+ w[1] = 1.f;
+ if (fy == fi[1]) w[1] -= f[1] - fy;
+ if (fy == fi[3]) w[1] -= fy + 1 - f[3];
+
+ for (int fx = fi[0]; fx <= fi[2]; ++fx)
+ {
+ w[0] = 1.f;
+ if (fx == fi[0]) w[0] -= f[0] - fx;
+ if (fx == fi[2]) w[0] -= fx + 1 - f[2];
+
+ const float ws = w[1] * w[0] * rs;
+
+ switch (srcFormat)
+ {
+ case video::ECF_A1R5G5B5: sbgra = video::A1R5G5B5toA8R8G8B8(*(u16*)(srcData + (fy*src_clip.x1) * 2 + (fx * 2))); break;
+ case video::ECF_R5G6B5: sbgra = video::R5G6B5toA8R8G8B8(*(u16*)(srcData + (fy*src_clip.x1) * 2 + (fx * 2))); break;
+ case video::ECF_A8R8G8B8: sbgra = *(u32*)(srcData + (fy*src_clip.x1) * 4 + (fx * 4)); break;
+ case video::ECF_R8G8B8:
+ {
+ const u8* p = srcData + (fy*src_clip.x1) * 3 + (fx * 3);
+ sbgra = 0xFF000000 | p[0] << 16 | p[1] << 8 | p[2];
+ } break;
+ default: break;
+ }
+ if (src_sRGB)
+ {
+ sum[0] += srgb_8bit_to_linear_float[(sbgra) & 0xFF] * ws;
+ sum[1] += srgb_8bit_to_linear_float[(sbgra >> 8) & 0xFF] * ws;
+ sum[2] += srgb_8bit_to_linear_float[(sbgra >> 16) & 0xFF] * ws;
+ sum[3] += ((sbgra >> 24) & 0xFF) * ws;
+ }
+ else
+ {
+ sum[0] += ((sbgra) & 0xFF) * ws;
+ sum[1] += ((sbgra >> 8) & 0xFF) * ws;
+ sum[2] += ((sbgra >> 16) & 0xFF) * ws;
+ sum[3] += ((sbgra >> 24) & 0xFF) * ws;
+ }
+
+ }
+ }
+ switch (op)
+ {
+ case BLITTER_TEXTURE_ALPHA_BLEND:
+ case BLITTER_TEXTURE_ALPHA_COLOR_BLEND:
+ break;
+ default:
+ break;
+ }
+ if (dst_sRGB)
+ {
+ sbgra = linear_to_srgb_8bit(sum[0]) |
+ linear_to_srgb_8bit(sum[1]) << 8 |
+ linear_to_srgb_8bit(sum[2]) << 16 |
+ (u32)(sum[3]) << 24;
+ }
+ else
+ {
+ sbgra = (u32)(sum[0]) |
+ (u32)(sum[1]) << 8 |
+ (u32)(sum[2]) << 16 |
+ (u32)(sum[3]) << 24;
+ }
+ switch (dstFormat)
+ {
+ case video::ECF_A8R8G8B8: *(u32*)(dstData + (dy*dst_clip.x1) * 4 + (dx * 4)) = sbgra; break;
+ case video::ECF_R8G8B8:
+ {
+ u8* p = dstData + (dy*dst_clip.x1) * 3 + (dx * 3);
+ p[2] = (sbgra) & 0xFF;
+ p[1] = (sbgra >> 8) & 0xFF;
+ p[0] = (sbgra >> 16) & 0xFF;
+ } break;
+ case video::ECF_A1R5G5B5: *(u16*)(dstData + (dy*dst_clip.x1) * 2 + (dx * 2)) = video::A8R8G8B8toA1R5G5B5(sbgra); break;
+ case video::ECF_R5G6B5: *(u16*)(dstData + (dy*dst_clip.x1) * 2 + (dx * 2)) = video::A8R8G8B8toR5G6B5(sbgra); break;
+ default:
+ break;
+ }
+ }
+ }
+
+}
+
} // end namespace video
} // end namespace irr
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