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thorvg/src/renderer/sw_engine/tvgSwFill.cpp
Hermet Park 24711e485c infra: renames the source folders 
lib -> renderer
bin -> tools
utils -> common
2023-08-28 13:11:24 +09:00

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/*
* Copyright (c) 2020 - 2023 the ThorVG project. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "tvgMath.h"
#include "tvgSwCommon.h"
/************************************************************************/
/* Internal Class Implementation */
/************************************************************************/
#define GRADIENT_STOP_SIZE 1024
#define FIXPT_BITS 8
#define FIXPT_SIZE (1<<FIXPT_BITS)
static bool _updateColorTable(SwFill* fill, const Fill* fdata, const SwSurface* surface, uint8_t opacity)
{
if (!fill->ctable) {
fill->ctable = static_cast<uint32_t*>(malloc(GRADIENT_STOP_SIZE * sizeof(uint32_t)));
if (!fill->ctable) return false;
}
const Fill::ColorStop* colors;
auto cnt = fdata->colorStops(&colors);
if (cnt == 0 || !colors) return false;
auto pColors = colors;
auto a = MULTIPLY(pColors->a, opacity);
if (a < 255) fill->translucent = true;
auto r = pColors->r;
auto g = pColors->g;
auto b = pColors->b;
auto rgba = surface->join(r, g, b, a);
auto inc = 1.0f / static_cast<float>(GRADIENT_STOP_SIZE);
auto pos = 1.5f * inc;
uint32_t i = 0;
fill->ctable[i++] = ALPHA_BLEND(rgba | 0xff000000, a);
while (pos <= pColors->offset) {
fill->ctable[i] = fill->ctable[i - 1];
++i;
pos += inc;
}
for (uint32_t j = 0; j < cnt - 1; ++j) {
auto curr = colors + j;
auto next = curr + 1;
auto delta = 1.0f / (next->offset - curr->offset);
auto a2 = MULTIPLY(next->a, opacity);
if (!fill->translucent && a2 < 255) fill->translucent = true;
auto rgba2 = surface->join(next->r, next->g, next->b, a2);
while (pos < next->offset && i < GRADIENT_STOP_SIZE) {
auto t = (pos - curr->offset) * delta;
auto dist = static_cast<int32_t>(255 * t);
auto dist2 = 255 - dist;
auto color = INTERPOLATE(rgba, rgba2, dist2);
fill->ctable[i] = ALPHA_BLEND((color | 0xff000000), (color >> 24));
++i;
pos += inc;
}
rgba = rgba2;
a = a2;
}
rgba = ALPHA_BLEND((rgba | 0xff000000), a);
for (; i < GRADIENT_STOP_SIZE; ++i)
fill->ctable[i] = rgba;
//Make sure the last color stop is represented at the end of the table
fill->ctable[GRADIENT_STOP_SIZE - 1] = rgba;
return true;
}
bool _prepareLinear(SwFill* fill, const LinearGradient* linear, const Matrix* transform)
{
float x1, x2, y1, y2;
if (linear->linear(&x1, &y1, &x2, &y2) != Result::Success) return false;
fill->linear.dx = x2 - x1;
fill->linear.dy = y2 - y1;
fill->linear.len = fill->linear.dx * fill->linear.dx + fill->linear.dy * fill->linear.dy;
if (fill->linear.len < FLT_EPSILON) return true;
fill->linear.dx /= fill->linear.len;
fill->linear.dy /= fill->linear.len;
fill->linear.offset = -fill->linear.dx * x1 - fill->linear.dy * y1;
auto gradTransform = linear->transform();
bool isTransformation = !mathIdentity((const Matrix*)(&gradTransform));
if (isTransformation) {
if (transform) gradTransform = mathMultiply(transform, &gradTransform);
} else if (transform) {
gradTransform = *transform;
isTransformation = true;
}
if (isTransformation) {
Matrix invTransform;
if (!mathInverse(&gradTransform, &invTransform)) return false;
fill->linear.offset += fill->linear.dx * invTransform.e13 + fill->linear.dy * invTransform.e23;
auto dx = fill->linear.dx;
fill->linear.dx = dx * invTransform.e11 + fill->linear.dy * invTransform.e21;
fill->linear.dy = dx * invTransform.e12 + fill->linear.dy * invTransform.e22;
fill->linear.len = fill->linear.dx * fill->linear.dx + fill->linear.dy * fill->linear.dy;
if (fill->linear.len < FLT_EPSILON) return true;
}
return true;
}
bool _prepareRadial(SwFill* fill, const RadialGradient* radial, const Matrix* transform)
{
float radius, cx, cy;
if (radial->radial(&cx, &cy, &radius) != Result::Success) return false;
if (radius < FLT_EPSILON) return true;
float invR = 1.0f / radius;
fill->radial.shiftX = -cx;
fill->radial.shiftY = -cy;
fill->radial.a = radius;
auto gradTransform = radial->transform();
bool isTransformation = !mathIdentity((const Matrix*)(&gradTransform));
if (isTransformation) {
if (transform) gradTransform = mathMultiply(transform, &gradTransform);
} else if (transform) {
gradTransform = *transform;
isTransformation = true;
}
if (isTransformation) {
Matrix invTransform;
if (!mathInverse(&gradTransform, &invTransform)) return false;
fill->radial.a11 = invTransform.e11 * invR;
fill->radial.a12 = invTransform.e12 * invR;
fill->radial.shiftX += invTransform.e13;
fill->radial.a21 = invTransform.e21 * invR;
fill->radial.a22 = invTransform.e22 * invR;
fill->radial.shiftY += invTransform.e23;
fill->radial.detSecDeriv = 2.0f * fill->radial.a11 * fill->radial.a11 + 2 * fill->radial.a21 * fill->radial.a21;
fill->radial.a *= sqrt(pow(invTransform.e11, 2) + pow(invTransform.e21, 2));
} else {
fill->radial.a11 = fill->radial.a22 = invR;
fill->radial.a12 = fill->radial.a21 = 0.0f;
fill->radial.detSecDeriv = 2.0f * invR * invR;
}
fill->radial.shiftX *= invR;
fill->radial.shiftY *= invR;
return true;
}
static inline uint32_t _clamp(const SwFill* fill, int32_t pos)
{
switch (fill->spread) {
case FillSpread::Pad: {
if (pos >= GRADIENT_STOP_SIZE) pos = GRADIENT_STOP_SIZE - 1;
else if (pos < 0) pos = 0;
break;
}
case FillSpread::Repeat: {
pos = pos % GRADIENT_STOP_SIZE;
if (pos < 0) pos = GRADIENT_STOP_SIZE + pos;
break;
}
case FillSpread::Reflect: {
auto limit = GRADIENT_STOP_SIZE * 2;
pos = pos % limit;
if (pos < 0) pos = limit + pos;
if (pos >= GRADIENT_STOP_SIZE) pos = (limit - pos - 1);
break;
}
}
return pos;
}
static inline uint32_t _fixedPixel(const SwFill* fill, int32_t pos)
{
int32_t i = (pos + (FIXPT_SIZE / 2)) >> FIXPT_BITS;
return fill->ctable[_clamp(fill, i)];
}
static inline uint32_t _pixel(const SwFill* fill, float pos)
{
auto i = static_cast<int32_t>(pos * (GRADIENT_STOP_SIZE - 1) + 0.5f);
return fill->ctable[_clamp(fill, i)];
}
/************************************************************************/
/* External Class Implementation */
/************************************************************************/
void fillRadial(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, uint8_t* cmp, SwAlpha alpha, uint8_t csize, uint8_t opacity)
{
auto rx = (x + 0.5f) * fill->radial.a11 + (y + 0.5f) * fill->radial.a12 + fill->radial.shiftX;
auto ry = (x + 0.5f) * fill->radial.a21 + (y + 0.5f) * fill->radial.a22 + fill->radial.shiftY;
// detSecondDerivative = d(detFirstDerivative)/dx = d( d(det)/dx )/dx
auto detSecondDerivative = fill->radial.detSecDeriv;
// detFirstDerivative = d(det)/dx
auto detFirstDerivative = 2.0f * (fill->radial.a11 * rx + fill->radial.a21 * ry) + 0.5f * detSecondDerivative;
auto det = rx * rx + ry * ry;
if (opacity == 255) {
for (uint32_t i = 0 ; i < len ; ++i, ++dst, cmp += csize) {
*dst = opBlendNormal(_pixel(fill, sqrtf(det)), *dst, alpha(cmp));
det += detFirstDerivative;
detFirstDerivative += detSecondDerivative;
}
} else {
for (uint32_t i = 0 ; i < len ; ++i, ++dst, cmp += csize) {
*dst = opBlendNormal(_pixel(fill, sqrtf(det)), *dst, MULTIPLY(opacity, alpha(cmp)));
det += detFirstDerivative;
detFirstDerivative += detSecondDerivative;
}
}
}
void fillRadial(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, SwBlender op, uint8_t a)
{
auto rx = (x + 0.5f) * fill->radial.a11 + (y + 0.5f) * fill->radial.a12 + fill->radial.shiftX;
auto ry = (x + 0.5f) * fill->radial.a21 + (y + 0.5f) * fill->radial.a22 + fill->radial.shiftY;
// detSecondDerivative = d(detFirstDerivative)/dx = d( d(det)/dx )/dx
auto detSecondDerivative = fill->radial.detSecDeriv;
// detFirstDerivative = d(det)/dx
auto detFirstDerivative = 2.0f * (fill->radial.a11 * rx + fill->radial.a21 * ry) + 0.5f * detSecondDerivative;
auto det = rx * rx + ry * ry;
for (uint32_t i = 0 ; i < len ; ++i, ++dst) {
*dst = op(_pixel(fill, sqrtf(det)), *dst, a);
det += detFirstDerivative;
detFirstDerivative += detSecondDerivative;
}
}
void fillRadial(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32_t len, SwMask maskOp, uint8_t a)
{
auto rx = (x + 0.5f) * fill->radial.a11 + (y + 0.5f) * fill->radial.a12 + fill->radial.shiftX;
auto ry = (x + 0.5f) * fill->radial.a21 + (y + 0.5f) * fill->radial.a22 + fill->radial.shiftY;
// detSecondDerivative = d(detFirstDerivative)/dx = d( d(det)/dx )/dx
auto detSecondDerivative = fill->radial.detSecDeriv;
// detFirstDerivative = d(det)/dx
auto detFirstDerivative = 2.0f * (fill->radial.a11 * rx + fill->radial.a21 * ry) + 0.5f * detSecondDerivative;
auto det = rx * rx + ry * ry;
for (uint32_t i = 0 ; i < len ; ++i, ++dst) {
auto src = MULTIPLY(a, A(_pixel(fill, sqrtf(det))));
*dst = maskOp(src, *dst, ~src);
det += detFirstDerivative;
detFirstDerivative += detSecondDerivative;
}
}
void fillRadial(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32_t len, uint8_t* cmp, SwMask maskOp, uint8_t a)
{
auto rx = (x + 0.5f) * fill->radial.a11 + (y + 0.5f) * fill->radial.a12 + fill->radial.shiftX;
auto ry = (x + 0.5f) * fill->radial.a21 + (y + 0.5f) * fill->radial.a22 + fill->radial.shiftY;
// detSecondDerivative = d(detFirstDerivative)/dx = d( d(det)/dx )/dx
auto detSecondDerivative = fill->radial.detSecDeriv;
// detFirstDerivative = d(det)/dx
auto detFirstDerivative = 2.0f * (fill->radial.a11 * rx + fill->radial.a21 * ry) + 0.5f * detSecondDerivative;
auto det = rx * rx + ry * ry;
for (uint32_t i = 0 ; i < len ; ++i, ++dst, ++cmp) {
auto src = MULTIPLY(A(_pixel(fill, sqrtf(det))), a);
auto tmp = maskOp(src, *cmp, 0);
*dst = tmp + MULTIPLY(*dst, ~tmp);
det += detFirstDerivative;
detFirstDerivative += detSecondDerivative;
}
}
void fillRadial(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, SwBlender op, SwBlender op2, uint8_t a)
{
auto rx = (x + 0.5f) * fill->radial.a11 + (y + 0.5f) * fill->radial.a12 + fill->radial.shiftX;
auto ry = (x + 0.5f) * fill->radial.a21 + (y + 0.5f) * fill->radial.a22 + fill->radial.shiftY;
// detSecondDerivative = d(detFirstDerivative)/dx = d( d(det)/dx )/dx
auto detSecondDerivative = fill->radial.detSecDeriv;
// detFirstDerivative = d(det)/dx
auto detFirstDerivative = 2.0f * (fill->radial.a11 * rx + fill->radial.a21 * ry) + 0.5f * detSecondDerivative;
auto det = rx * rx + ry * ry;
if (a == 255) {
for (uint32_t i = 0 ; i < len ; ++i, ++dst) {
auto tmp = op(_pixel(fill, sqrtf(det)), *dst, 255);
*dst = op2(tmp, *dst, 255);
det += detFirstDerivative;
detFirstDerivative += detSecondDerivative;
}
} else {
for (uint32_t i = 0 ; i < len ; ++i, ++dst) {
auto tmp = op(_pixel(fill, sqrtf(det)), *dst, 255);
auto tmp2 = op2(tmp, *dst, 255);
*dst = INTERPOLATE(tmp2, *dst, a);
det += detFirstDerivative;
detFirstDerivative += detSecondDerivative;
}
}
}
void fillLinear(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, uint8_t* cmp, SwAlpha alpha, uint8_t csize, uint8_t opacity)
{
//Rotation
float rx = x + 0.5f;
float ry = y + 0.5f;
float t = (fill->linear.dx * rx + fill->linear.dy * ry + fill->linear.offset) * (GRADIENT_STOP_SIZE - 1);
float inc = (fill->linear.dx) * (GRADIENT_STOP_SIZE - 1);
if (opacity == 255) {
if (mathZero(inc)) {
auto color = _fixedPixel(fill, static_cast<int32_t>(t * FIXPT_SIZE));
for (uint32_t i = 0; i < len; ++i, ++dst, cmp += csize) {
*dst = opBlendNormal(color, *dst, alpha(cmp));
}
return;
}
auto vMax = static_cast<float>(INT32_MAX >> (FIXPT_BITS + 1));
auto vMin = -vMax;
auto v = t + (inc * len);
//we can use fixed point math
if (v < vMax && v > vMin) {
auto t2 = static_cast<int32_t>(t * FIXPT_SIZE);
auto inc2 = static_cast<int32_t>(inc * FIXPT_SIZE);
for (uint32_t j = 0; j < len; ++j, ++dst, cmp += csize) {
*dst = opBlendNormal(_fixedPixel(fill, t2), *dst, alpha(cmp));
t2 += inc2;
}
//we have to fallback to float math
} else {
uint32_t counter = 0;
while (counter++ < len) {
*dst = opBlendNormal(_pixel(fill, t / GRADIENT_STOP_SIZE), *dst, alpha(cmp));
++dst;
t += inc;
cmp += csize;
}
}
} else {
if (mathZero(inc)) {
auto color = _fixedPixel(fill, static_cast<int32_t>(t * FIXPT_SIZE));
for (uint32_t i = 0; i < len; ++i, ++dst, cmp += csize) {
*dst = opBlendNormal(color, *dst, MULTIPLY(alpha(cmp), opacity));
}
return;
}
auto vMax = static_cast<float>(INT32_MAX >> (FIXPT_BITS + 1));
auto vMin = -vMax;
auto v = t + (inc * len);
//we can use fixed point math
if (v < vMax && v > vMin) {
auto t2 = static_cast<int32_t>(t * FIXPT_SIZE);
auto inc2 = static_cast<int32_t>(inc * FIXPT_SIZE);
for (uint32_t j = 0; j < len; ++j, ++dst, cmp += csize) {
*dst = opBlendNormal(_fixedPixel(fill, t2), *dst, MULTIPLY(alpha(cmp), opacity));
t2 += inc2;
}
//we have to fallback to float math
} else {
uint32_t counter = 0;
while (counter++ < len) {
*dst = opBlendNormal(_pixel(fill, t / GRADIENT_STOP_SIZE), *dst, MULTIPLY(opacity, alpha(cmp)));
++dst;
t += inc;
cmp += csize;
}
}
}
}
void fillLinear(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32_t len, SwMask maskOp, uint8_t a)
{
//Rotation
float rx = x + 0.5f;
float ry = y + 0.5f;
float t = (fill->linear.dx * rx + fill->linear.dy * ry + fill->linear.offset) * (GRADIENT_STOP_SIZE - 1);
float inc = (fill->linear.dx) * (GRADIENT_STOP_SIZE - 1);
if (mathZero(inc)) {
auto src = MULTIPLY(a, A(_fixedPixel(fill, static_cast<int32_t>(t * FIXPT_SIZE))));
for (uint32_t i = 0; i < len; ++i, ++dst) {
*dst = maskOp(src, *dst, ~src);
}
return;
}
auto vMax = static_cast<float>(INT32_MAX >> (FIXPT_BITS + 1));
auto vMin = -vMax;
auto v = t + (inc * len);
//we can use fixed point math
if (v < vMax && v > vMin) {
auto t2 = static_cast<int32_t>(t * FIXPT_SIZE);
auto inc2 = static_cast<int32_t>(inc * FIXPT_SIZE);
for (uint32_t j = 0; j < len; ++j, ++dst) {
auto src = MULTIPLY(_fixedPixel(fill, t2), a);
*dst = maskOp(src, *dst, ~src);
t2 += inc2;
}
//we have to fallback to float math
} else {
uint32_t counter = 0;
while (counter++ < len) {
auto src = MULTIPLY(_pixel(fill, t / GRADIENT_STOP_SIZE), a);
*dst = maskOp(src, *dst, ~src);
++dst;
t += inc;
}
}
}
void fillLinear(const SwFill* fill, uint8_t* dst, uint32_t y, uint32_t x, uint32_t len, uint8_t* cmp, SwMask maskOp, uint8_t a)
{
//Rotation
float rx = x + 0.5f;
float ry = y + 0.5f;
float t = (fill->linear.dx * rx + fill->linear.dy * ry + fill->linear.offset) * (GRADIENT_STOP_SIZE - 1);
float inc = (fill->linear.dx) * (GRADIENT_STOP_SIZE - 1);
if (mathZero(inc)) {
auto src = A(_fixedPixel(fill, static_cast<int32_t>(t * FIXPT_SIZE)));
src = MULTIPLY(src, a);
for (uint32_t i = 0; i < len; ++i, ++dst, ++cmp) {
auto tmp = maskOp(src, *cmp, 0);
*dst = tmp + MULTIPLY(*dst, ~tmp);
}
return;
}
auto vMax = static_cast<float>(INT32_MAX >> (FIXPT_BITS + 1));
auto vMin = -vMax;
auto v = t + (inc * len);
//we can use fixed point math
if (v < vMax && v > vMin) {
auto t2 = static_cast<int32_t>(t * FIXPT_SIZE);
auto inc2 = static_cast<int32_t>(inc * FIXPT_SIZE);
for (uint32_t j = 0; j < len; ++j, ++dst, ++cmp) {
auto src = MULTIPLY(a, A(_fixedPixel(fill, t2)));
auto tmp = maskOp(src, *cmp, 0);
*dst = tmp + MULTIPLY(*dst, ~tmp);
t2 += inc2;
}
//we have to fallback to float math
} else {
uint32_t counter = 0;
while (counter++ < len) {
auto src = MULTIPLY(A(_pixel(fill, t / GRADIENT_STOP_SIZE)), a);
auto tmp = maskOp(src, *cmp, 0);
*dst = tmp + MULTIPLY(*dst, ~tmp);
++dst;
++cmp;
t += inc;
}
}
}
void fillLinear(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, SwBlender op, uint8_t a)
{
//Rotation
float rx = x + 0.5f;
float ry = y + 0.5f;
float t = (fill->linear.dx * rx + fill->linear.dy * ry + fill->linear.offset) * (GRADIENT_STOP_SIZE - 1);
float inc = (fill->linear.dx) * (GRADIENT_STOP_SIZE - 1);
if (mathZero(inc)) {
auto color = _fixedPixel(fill, static_cast<int32_t>(t * FIXPT_SIZE));
for (uint32_t i = 0; i < len; ++i, ++dst) {
*dst = op(color, *dst, a);
}
return;
}
auto vMax = static_cast<float>(INT32_MAX >> (FIXPT_BITS + 1));
auto vMin = -vMax;
auto v = t + (inc * len);
//we can use fixed point math
if (v < vMax && v > vMin) {
auto t2 = static_cast<int32_t>(t * FIXPT_SIZE);
auto inc2 = static_cast<int32_t>(inc * FIXPT_SIZE);
for (uint32_t j = 0; j < len; ++j, ++dst) {
*dst = op(_fixedPixel(fill, t2), *dst, a);
t2 += inc2;
}
//we have to fallback to float math
} else {
uint32_t counter = 0;
while (counter++ < len) {
*dst = op(_pixel(fill, t / GRADIENT_STOP_SIZE), *dst, a);
++dst;
t += inc;
}
}
}
void fillLinear(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x, uint32_t len, SwBlender op, SwBlender op2, uint8_t a)
{
//Rotation
float rx = x + 0.5f;
float ry = y + 0.5f;
float t = (fill->linear.dx * rx + fill->linear.dy * ry + fill->linear.offset) * (GRADIENT_STOP_SIZE - 1);
float inc = (fill->linear.dx) * (GRADIENT_STOP_SIZE - 1);
if (mathZero(inc)) {
auto color = _fixedPixel(fill, static_cast<int32_t>(t * FIXPT_SIZE));
if (a == 255) {
for (uint32_t i = 0; i < len; ++i, ++dst) {
auto tmp = op(color, *dst, a);
*dst = op2(tmp, *dst, 255);
}
} else {
for (uint32_t i = 0; i < len; ++i, ++dst) {
auto tmp = op(color, *dst, a);
auto tmp2 = op2(tmp, *dst, 255);
*dst = INTERPOLATE(tmp2, *dst, a);
}
}
return;
}
auto vMax = static_cast<float>(INT32_MAX >> (FIXPT_BITS + 1));
auto vMin = -vMax;
auto v = t + (inc * len);
if (a == 255) {
//we can use fixed point math
if (v < vMax && v > vMin) {
auto t2 = static_cast<int32_t>(t * FIXPT_SIZE);
auto inc2 = static_cast<int32_t>(inc * FIXPT_SIZE);
for (uint32_t j = 0; j < len; ++j, ++dst) {
auto tmp = op(_fixedPixel(fill, t2), *dst, 255);
*dst = op2(tmp, *dst, 255);
t2 += inc2;
}
//we have to fallback to float math
} else {
uint32_t counter = 0;
while (counter++ < len) {
auto tmp = op(_pixel(fill, t / GRADIENT_STOP_SIZE), *dst, 255);
*dst = op2(tmp, *dst, 255);
++dst;
t += inc;
}
}
} else {
//we can use fixed point math
if (v < vMax && v > vMin) {
auto t2 = static_cast<int32_t>(t * FIXPT_SIZE);
auto inc2 = static_cast<int32_t>(inc * FIXPT_SIZE);
for (uint32_t j = 0; j < len; ++j, ++dst) {
auto tmp = op(_fixedPixel(fill, t2), *dst, 255);
auto tmp2 = op2(tmp, *dst, 255);
*dst = INTERPOLATE(tmp2, *dst, a);
t2 += inc2;
}
//we have to fallback to float math
} else {
uint32_t counter = 0;
while (counter++ < len) {
auto tmp = op(_pixel(fill, t / GRADIENT_STOP_SIZE), *dst, 255);
auto tmp2 = op2(tmp, *dst, 255);
*dst = INTERPOLATE(tmp2, *dst, a);
++dst;
t += inc;
}
}
}
}
bool fillGenColorTable(SwFill* fill, const Fill* fdata, const Matrix* transform, SwSurface* surface, uint8_t opacity, bool ctable)
{
if (!fill) return false;
fill->spread = fdata->spread();
if (ctable) {
if (!_updateColorTable(fill, fdata, surface, opacity)) return false;
}
if (fdata->identifier() == TVG_CLASS_ID_LINEAR) {
return _prepareLinear(fill, static_cast<const LinearGradient*>(fdata), transform);
} else if (fdata->identifier() == TVG_CLASS_ID_RADIAL) {
return _prepareRadial(fill, static_cast<const RadialGradient*>(fdata), transform);
}
//LOG: What type of gradient?!
return false;
}
void fillReset(SwFill* fill)
{
if (fill->ctable) {
free(fill->ctable);
fill->ctable = nullptr;
}
fill->translucent = false;
}
void fillFree(SwFill* fill)
{
if (!fill) return;
if (fill->ctable) free(fill->ctable);
free(fill);
}
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