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Merge branch 'master' of https://github.com/coelckers/gzdoom

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This commit is contained in:
Christoph Oelckers 2017-03-22 14:59:35 +01:00
commit 62fbb00bc9
4 changed files with 85 additions and 35 deletions
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64
src/polyrenderer/drawers/poly_drawer32_sse2.h
View file

@ -82,7 +82,6 @@ public:
auto flags = args->uniforms->flags;
bool is_fixed_light = (flags & TriUniforms::fixed_light) == TriUniforms::fixed_light;
uint32_t lightmask = is_fixed_light ? 0 : 0xffffffff;
auto colormaps = args->colormaps;
uint32_t srcalpha = args->uniforms->srcalpha;
uint32_t destalpha = args->uniforms->destalpha;
@ -202,12 +201,14 @@ public:
bgcolor = _mm_setzero_si128();
// Sample fgcolor
unsigned int ifgcolor[2];
unsigned int ifgcolor[2], ifgshade[2];
ifgcolor[0] = Sample<FilterModeT>(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight, oneU, oneV, color, translation);
ifgshade[0] = SampleShade(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight);
for (int j = 0; j < TriVertex::NumVarying; j++)
varyingPos[j] += varyingStep[j];
ifgcolor[1] = Sample<FilterModeT>(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight, oneU, oneV, color, translation);
ifgshade[1] = SampleShade(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight);
for (int j = 0; j < TriVertex::NumVarying; j++)
varyingPos[j] += varyingStep[j];
@ -232,7 +233,7 @@ public:
// Shade and blend
__m128i fgcolor = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i*)ifgcolor), _mm_setzero_si128());
fgcolor = Shade<ShadeModeT>(fgcolor, mlight, ifgcolor[0], ifgcolor[1], desaturate, inv_desaturate, shade_fade_lit, shade_light);
__m128i outcolor = Blend(fgcolor, bgcolor, ifgcolor[0], ifgcolor[1], srcalpha, destalpha);
__m128i outcolor = Blend(fgcolor, bgcolor, ifgcolor[0], ifgcolor[1], ifgshade[0], ifgshade[1], srcalpha, destalpha);
// Store result
_mm_storel_epi64((__m128i*)(dest + x * 8 + ix * 2), outcolor);
@ -303,12 +304,14 @@ public:
bgcolor = _mm_setzero_si128();
// Sample fgcolor
unsigned int ifgcolor[2];
unsigned int ifgcolor[2], ifgshade[2];
ifgcolor[0] = Sample<FilterModeT>(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight, oneU, oneV, color, translation);
ifgshade[0] = SampleShade(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight);
for (int j = 0; j < TriVertex::NumVarying; j++)
varyingPos[j] += varyingStep[j];
ifgcolor[1] = Sample<FilterModeT>(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight, oneU, oneV, color, translation);
ifgshade[1] = SampleShade(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight);
for (int j = 0; j < TriVertex::NumVarying; j++)
varyingPos[j] += varyingStep[j];
@ -333,7 +336,7 @@ public:
// Shade and blend
__m128i fgcolor = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i*)ifgcolor), _mm_setzero_si128());
fgcolor = Shade<ShadeModeT>(fgcolor, mlight, ifgcolor[0], ifgcolor[1], desaturate, inv_desaturate, shade_fade_lit, shade_light);
__m128i outcolor = Blend(fgcolor, bgcolor, ifgcolor[0], ifgcolor[1], srcalpha, destalpha);
__m128i outcolor = Blend(fgcolor, bgcolor, ifgcolor[0], ifgcolor[1], ifgshade[0], ifgshade[1], srcalpha, destalpha);
// Store result
_mm_storel_epi64((__m128i*)desttmp, outcolor);
@ -393,12 +396,14 @@ public:
bgcolor = _mm_setzero_si128();
// Sample fgcolor
unsigned int ifgcolor[2];
unsigned int ifgcolor[2], ifgshade[2];
ifgcolor[0] = Sample<FilterModeT>(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight, oneU, oneV, color, translation);
ifgshade[0] = SampleShade(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight);
for (int j = 0; j < TriVertex::NumVarying; j++)
varyingPos[j] += varyingStep[j];
ifgcolor[1] = Sample<FilterModeT>(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight, oneU, oneV, color, translation);
ifgshade[1] = SampleShade(varyingPos[0], varyingPos[1], texPixels, texWidth, texHeight);
for (int j = 0; j < TriVertex::NumVarying; j++)
varyingPos[j] += varyingStep[j];
@ -423,7 +428,7 @@ public:
// Shade and blend
__m128i fgcolor = _mm_unpacklo_epi8(_mm_loadl_epi64((__m128i*)ifgcolor), _mm_setzero_si128());
fgcolor = Shade<ShadeModeT>(fgcolor, mlight, ifgcolor[0], ifgcolor[1], desaturate, inv_desaturate, shade_fade_lit, shade_light);
__m128i outcolor = Blend(fgcolor, bgcolor, ifgcolor[0], ifgcolor[1], srcalpha, destalpha);
__m128i outcolor = Blend(fgcolor, bgcolor, ifgcolor[0], ifgcolor[1], ifgshade[0], ifgshade[1], srcalpha, destalpha);
// Store result
_mm_storel_epi64((__m128i*)desttmp, outcolor);
@ -525,6 +530,25 @@ private:
}
}
FORCEINLINE static unsigned int VECTORCALL SampleShade(int32_t u, int32_t v, const uint32_t *texPixels, int texWidth, int texHeight)
{
using namespace TriScreenDrawerModes;
if (SamplerT::Mode == (int)Samplers::Shaded)
{
const uint8_t *texpal = (const uint8_t *)texPixels;
uint32_t texelX = ((((uint32_t)u << 8) >> 16) * texWidth) >> 16;
uint32_t texelY = ((((uint32_t)v << 8) >> 16) * texHeight) >> 16;
unsigned int sampleshadeout = texpal[texelX * texHeight + texelY];
sampleshadeout += sampleshadeout >> 7; // 255 -> 256
return sampleshadeout;
}
else
{
return 0;
}
}
template<typename ShadeModeT>
FORCEINLINE static __m128i VECTORCALL Shade(__m128i fgcolor, __m128i mlight, unsigned int ifgcolor0, unsigned int ifgcolor1, int desaturate, __m128i inv_desaturate, __m128i shade_fade, __m128i shade_light)
{
@ -556,7 +580,7 @@ private:
return fgcolor;
}
FORCEINLINE static __m128i VECTORCALL Blend(__m128i fgcolor, __m128i bgcolor, unsigned int ifgcolor0, unsigned int ifgcolor1, uint32_t srcalpha, uint32_t destalpha)
FORCEINLINE static __m128i VECTORCALL Blend(__m128i fgcolor, __m128i bgcolor, unsigned int ifgcolor0, unsigned int ifgcolor1, unsigned int ifgshade0, unsigned int ifgshade1, uint32_t srcalpha, uint32_t destalpha)
{
using namespace TriScreenDrawerModes;
@ -582,6 +606,30 @@ private:
outcolor = _mm_packus_epi16(outcolor, _mm_setzero_si128());
return outcolor;
}
else if (BlendT::Mode == (int)BlendModes::Shaded)
{
ifgshade0 = (ifgshade0 * srcalpha + 128) >> 8;
ifgshade1 = (ifgshade1 * srcalpha + 128) >> 8;
__m128i alpha = _mm_set_epi16(ifgshade1, ifgshade1, ifgshade1, ifgshade1, ifgshade0, ifgshade0, ifgshade0, ifgshade0);
__m128i inv_alpha = _mm_sub_epi16(_mm_set1_epi16(256), alpha);
fgcolor = _mm_mullo_epi16(fgcolor, alpha);
bgcolor = _mm_mullo_epi16(bgcolor, inv_alpha);
__m128i outcolor = _mm_srli_epi16(_mm_add_epi16(fgcolor, bgcolor), 8);
outcolor = _mm_packus_epi16(outcolor, _mm_setzero_si128());
outcolor = _mm_or_si128(outcolor, _mm_set1_epi32(0xff000000));
return outcolor;
}
else if (BlendT::Mode == (int)BlendModes::AddClampShaded)
{
__m128i alpha = _mm_set_epi16(ifgshade1, ifgshade1, ifgshade1, ifgshade1, ifgshade0, ifgshade0, ifgshade0, ifgshade0);
fgcolor = _mm_srli_epi16(_mm_mullo_epi16(fgcolor, alpha), 8);
__m128i outcolor = _mm_add_epi16(fgcolor, bgcolor);
outcolor = _mm_packus_epi16(outcolor, _mm_setzero_si128());
outcolor = _mm_or_si128(outcolor, _mm_set1_epi32(0xff000000));
return outcolor;
}
else
{
uint32_t alpha0 = APART(ifgcolor0);

48
src/polyrenderer/drawers/screen_triangle.cpp
View file

@ -713,13 +713,13 @@ std::vector<void(*)(const TriDrawTriangleArgs *, WorkerThreadData *)> ScreenTria
&TriScreenDrawer8<TriScreenDrawerModes::AddClampBlend, TriScreenDrawerModes::TextureSampler>::Execute, // "Add", "add", false
&TriScreenDrawer8<TriScreenDrawerModes::SubClampBlend, TriScreenDrawerModes::TextureSampler>::Execute, // "Sub", "sub", false
&TriScreenDrawer8<TriScreenDrawerModes::RevSubClampBlend, TriScreenDrawerModes::TextureSampler>::Execute, // "RevSub", "revsub", false
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Stencil", "stencil", false
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Shaded", "shaded", false
&TriScreenDrawer8<TriScreenDrawerModes::ShadedBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Stencil", "stencil", false
&TriScreenDrawer8<TriScreenDrawerModes::ShadedBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Shaded", "shaded", false
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateCopy", "opaque", true
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAlphaBlend", "masked", true
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAdd", "add", true
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateSub", "sub", true
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateRevSub", "revsub", true
&TriScreenDrawer8<TriScreenDrawerModes::MaskedBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAlphaBlend", "masked", true
&TriScreenDrawer8<TriScreenDrawerModes::AddClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAdd", "add", true
&TriScreenDrawer8<TriScreenDrawerModes::SubClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateSub", "sub", true
&TriScreenDrawer8<TriScreenDrawerModes::RevSubClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateRevSub", "revsub", true
&TriScreenDrawer8<TriScreenDrawerModes::AddSrcColorBlend, TriScreenDrawerModes::TextureSampler>::Execute, // "AddSrcColorOneMinusSrcColor", "addsrccolor", false
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::SkycapSampler>::Execute // "Skycap", "skycap", false
};
@ -732,13 +732,13 @@ std::vector<void(*)(const TriDrawTriangleArgs *, WorkerThreadData *)> ScreenTria
&TriScreenDrawer8<TriScreenDrawerModes::AddClampBlend, TriScreenDrawerModes::FillSampler>::Execute, // "Add", "add", false
&TriScreenDrawer8<TriScreenDrawerModes::SubClampBlend, TriScreenDrawerModes::FillSampler>::Execute, // "Sub", "sub", false
&TriScreenDrawer8<TriScreenDrawerModes::RevSubClampBlend, TriScreenDrawerModes::FillSampler>::Execute, // "RevSub", "revsub", false
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Stencil", "stencil", false
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Shaded", "shaded", false
&TriScreenDrawer8<TriScreenDrawerModes::ShadedBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Stencil", "stencil", false
&TriScreenDrawer8<TriScreenDrawerModes::ShadedBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Shaded", "shaded", false
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateCopy", "opaque", true
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAlphaBlend", "masked", true
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAdd", "add", true
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateSub", "sub", true
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateRevSub", "revsub", true
&TriScreenDrawer8<TriScreenDrawerModes::MaskedBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAlphaBlend", "masked", true
&TriScreenDrawer8<TriScreenDrawerModes::AddClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAdd", "add", true
&TriScreenDrawer8<TriScreenDrawerModes::SubClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateSub", "sub", true
&TriScreenDrawer8<TriScreenDrawerModes::RevSubClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateRevSub", "revsub", true
&TriScreenDrawer8<TriScreenDrawerModes::AddSrcColorBlend, TriScreenDrawerModes::FillSampler>::Execute, // "AddSrcColorOneMinusSrcColor", "addsrccolor", false
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::FillSampler>::Execute // "Skycap", "skycap", false
};
@ -758,13 +758,13 @@ std::vector<void(*)(const TriDrawTriangleArgs *, WorkerThreadData *)> ScreenTria
&TriScreenDrawer32<TriScreenDrawerModes::AddClampBlend, TriScreenDrawerModes::TextureSampler>::Execute, // "Add", "add", false
&TriScreenDrawer32<TriScreenDrawerModes::SubClampBlend, TriScreenDrawerModes::TextureSampler>::Execute, // "Sub", "sub", false
&TriScreenDrawer32<TriScreenDrawerModes::RevSubClampBlend, TriScreenDrawerModes::TextureSampler>::Execute, // "RevSub", "revsub", false
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Stencil", "stencil", false
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Shaded", "shaded", false
&TriScreenDrawer32<TriScreenDrawerModes::ShadedBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Stencil", "stencil", false
&TriScreenDrawer32<TriScreenDrawerModes::ShadedBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Shaded", "shaded", false
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateCopy", "opaque", true
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAlphaBlend", "masked", true
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAdd", "add", true
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateSub", "sub", true
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateRevSub", "revsub", true
&TriScreenDrawer32<TriScreenDrawerModes::MaskedBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAlphaBlend", "masked", true
&TriScreenDrawer32<TriScreenDrawerModes::AddClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAdd", "add", true
&TriScreenDrawer32<TriScreenDrawerModes::SubClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateSub", "sub", true
&TriScreenDrawer32<TriScreenDrawerModes::RevSubClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateRevSub", "revsub", true
&TriScreenDrawer32<TriScreenDrawerModes::AddSrcColorBlend, TriScreenDrawerModes::TextureSampler>::Execute, // "AddSrcColorOneMinusSrcColor", "addsrccolor", false
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::SkycapSampler>::Execute // "Skycap", "skycap", false
};
@ -777,13 +777,13 @@ std::vector<void(*)(const TriDrawTriangleArgs *, WorkerThreadData *)> ScreenTria
&TriScreenDrawer32<TriScreenDrawerModes::AddClampBlend, TriScreenDrawerModes::FillSampler>::Execute, // "Add", "add", false
&TriScreenDrawer32<TriScreenDrawerModes::SubClampBlend, TriScreenDrawerModes::FillSampler>::Execute, // "Sub", "sub", false
&TriScreenDrawer32<TriScreenDrawerModes::RevSubClampBlend, TriScreenDrawerModes::FillSampler>::Execute, // "RevSub", "revsub", false
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Stencil", "stencil", false
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Shaded", "shaded", false
&TriScreenDrawer32<TriScreenDrawerModes::ShadedBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Stencil", "stencil", false
&TriScreenDrawer32<TriScreenDrawerModes::ShadedBlend, TriScreenDrawerModes::ShadedSampler>::Execute, // "Shaded", "shaded", false
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateCopy", "opaque", true
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAlphaBlend", "masked", true
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAdd", "add", true
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateSub", "sub", true
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateRevSub", "revsub", true
&TriScreenDrawer32<TriScreenDrawerModes::MaskedBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAlphaBlend", "masked", true
&TriScreenDrawer32<TriScreenDrawerModes::AddClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateAdd", "add", true
&TriScreenDrawer32<TriScreenDrawerModes::SubClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateSub", "sub", true
&TriScreenDrawer32<TriScreenDrawerModes::RevSubClampBlend, TriScreenDrawerModes::TranslatedSampler>::Execute, // "TranslateRevSub", "revsub", true
&TriScreenDrawer32<TriScreenDrawerModes::AddSrcColorBlend, TriScreenDrawerModes::FillSampler>::Execute, // "AddSrcColorOneMinusSrcColor", "addsrccolor", false
&TriScreenDrawer32<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::FillSampler>::Execute // "Skycap", "skycap", false
};

4
src/polyrenderer/drawers/screen_triangle.h
View file

@ -163,13 +163,15 @@ struct ScreenTriangleStepVariables
namespace TriScreenDrawerModes
{
enum class BlendModes { Opaque, Masked, AddClamp, SubClamp, RevSubClamp, AddSrcColorOneMinusSrcColor };
enum class BlendModes { Opaque, Masked, AddClamp, SubClamp, RevSubClamp, AddSrcColorOneMinusSrcColor, Shaded, AddClampShaded };
struct OpaqueBlend { static const int Mode = (int)BlendModes::Opaque; };
struct MaskedBlend { static const int Mode = (int)BlendModes::Masked; };
struct AddClampBlend { static const int Mode = (int)BlendModes::AddClamp; };
struct SubClampBlend { static const int Mode = (int)BlendModes::SubClamp; };
struct RevSubClampBlend { static const int Mode = (int)BlendModes::RevSubClamp; };
struct AddSrcColorBlend { static const int Mode = (int)BlendModes::AddSrcColorOneMinusSrcColor; };
struct ShadedBlend { static const int Mode = (int)BlendModes::Shaded; };
struct AddClampShadedBlend { static const int Mode = (int)BlendModes::AddClampShaded; };
enum class FilterModes { Nearest, Linear };
struct NearestFilter { static const int Mode = (int)FilterModes::Nearest; };

4
src/swrenderer/plane/r_skyplane.cpp
View file

@ -180,8 +180,8 @@ namespace swrenderer
double v = (texturemid + uv_stepd * (y1 - viewport->CenterY + 0.5)) / height;
double v_step = uv_stepd / height;
uint32_t uv_pos = (uint32_t)(v * 0x01000000);
uint32_t uv_step = (uint32_t)(v_step * 0x01000000);
uint32_t uv_pos = (uint32_t)(int32_t)(v * 0x01000000);
uint32_t uv_step = (uint32_t)(int32_t)(v_step * 0x01000000);
int x = start_x;
if (renderportal->MirrorFlags & RF_XFLIP)