mirror of
https://github.com/RetroDECK/ES-DE.git
synced 2024-11-22 14:15:38 +00:00
831 lines
26 KiB
C
831 lines
26 KiB
C
#include "plutovg-private.h"
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#include <limits.h>
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#include <math.h>
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#include <float.h>
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#define COLOR_TABLE_SIZE 1024
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typedef struct {
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plutovg_spread_method_t spread;
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plutovg_matrix_t matrix;
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uint32_t colortable[COLOR_TABLE_SIZE];
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union {
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struct {
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double x1, y1;
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double x2, y2;
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} linear;
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struct {
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double cx, cy, cr;
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double fx, fy, fr;
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} radial;
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};
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} gradient_data_t;
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typedef struct {
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plutovg_matrix_t matrix;
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uint8_t* data;
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int width;
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int height;
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int stride;
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int const_alpha;
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} texture_data_t;
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typedef struct {
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double dx;
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double dy;
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double l;
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double off;
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} linear_gradient_values_t;
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typedef struct {
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double dx;
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double dy;
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double dr;
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double sqrfr;
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double a;
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double inv2a;
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int extended;
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} radial_gradient_values_t;
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static inline uint32_t premultiply_color(const plutovg_color_t* color, double opacity)
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{
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uint32_t alpha = (uint8_t)(color->a * opacity * 255);
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uint32_t pr = (uint8_t)(color->r * alpha);
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uint32_t pg = (uint8_t)(color->g * alpha);
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uint32_t pb = (uint8_t)(color->b * alpha);
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return (alpha << 24) | (pr << 16) | (pg << 8) | (pb);
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}
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static inline uint32_t combine_opacity(const plutovg_color_t* color, double opacity)
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{
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uint32_t a = (uint8_t)(color->a * opacity * 255);
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uint32_t r = (uint8_t)(color->r * 255);
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uint32_t g = (uint8_t)(color->g * 255);
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uint32_t b = (uint8_t)(color->b * 255);
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return (a << 24) | (r << 16) | (g << 8) | (b);
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}
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static inline uint32_t premultiply_pixel(uint32_t color)
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{
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uint32_t a = plutovg_alpha(color);
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uint32_t r = plutovg_red(color);
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uint32_t g = plutovg_green(color);
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uint32_t b = plutovg_blue(color);
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uint32_t pr = (r * a) / 255;
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uint32_t pg = (g * a) / 255;
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uint32_t pb = (b * a) / 255;
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return (a << 24) | (pr << 16) | (pg << 8) | (pb);
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}
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static inline uint32_t interpolate_pixel(uint32_t x, uint32_t a, uint32_t y, uint32_t b)
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{
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uint32_t t = (x & 0xff00ff) * a + (y & 0xff00ff) * b;
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t = (t + ((t >> 8) & 0xff00ff) + 0x800080) >> 8;
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t &= 0xff00ff;
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x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b;
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x = (x + ((x >> 8) & 0xff00ff) + 0x800080);
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x &= 0xff00ff00;
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x |= t;
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return x;
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}
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static inline uint32_t BYTE_MUL(uint32_t x, uint32_t a)
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{
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uint32_t t = (x & 0xff00ff) * a;
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t = (t + ((t >> 8) & 0xff00ff) + 0x800080) >> 8;
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t &= 0xff00ff;
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x = ((x >> 8) & 0xff00ff) * a;
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x = (x + ((x >> 8) & 0xff00ff) + 0x800080);
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x &= 0xff00ff00;
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x |= t;
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return x;
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}
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static inline void memfill32(uint32_t* dest, uint32_t value, int length)
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{
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for(int i = 0;i < length;i++)
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dest[i] = value;
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}
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static inline int gradient_clamp(const gradient_data_t* gradient, int ipos)
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{
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if(gradient->spread == plutovg_spread_method_repeat)
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{
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ipos = ipos % COLOR_TABLE_SIZE;
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ipos = ipos < 0 ? COLOR_TABLE_SIZE + ipos : ipos;
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}
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else if(gradient->spread == plutovg_spread_method_reflect)
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{
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const int limit = COLOR_TABLE_SIZE * 2;
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ipos = ipos % limit;
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ipos = ipos < 0 ? limit + ipos : ipos;
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ipos = ipos >= COLOR_TABLE_SIZE ? limit - 1 - ipos : ipos;
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}
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else
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{
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if(ipos < 0)
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ipos = 0;
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else if(ipos >= COLOR_TABLE_SIZE)
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ipos = COLOR_TABLE_SIZE - 1;
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}
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return ipos;
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}
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#define FIXPT_BITS 8
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#define FIXPT_SIZE (1 << FIXPT_BITS)
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static inline uint32_t gradient_pixel_fixed(const gradient_data_t* gradient, int fixed_pos)
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{
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int ipos = (fixed_pos + (FIXPT_SIZE / 2)) >> FIXPT_BITS;
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return gradient->colortable[gradient_clamp(gradient, ipos)];
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}
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static inline uint32_t gradient_pixel(const gradient_data_t* gradient, double pos)
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{
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int ipos = (int)(pos * (COLOR_TABLE_SIZE - 1) + 0.5);
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return gradient->colortable[gradient_clamp(gradient, ipos)];
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}
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static void fetch_linear_gradient(uint32_t* buffer, const linear_gradient_values_t* v, const gradient_data_t* gradient, int y, int x, int length)
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{
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double t, inc;
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double rx = 0, ry = 0;
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if(v->l == 0.0)
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{
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t = inc = 0;
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}
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else
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{
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rx = gradient->matrix.m01 * (y + 0.5) + gradient->matrix.m00 * (x + 0.5) + gradient->matrix.m02;
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ry = gradient->matrix.m11 * (y + 0.5) + gradient->matrix.m10 * (x + 0.5) + gradient->matrix.m12;
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t = v->dx * rx + v->dy * ry + v->off;
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inc = v->dx * gradient->matrix.m00 + v->dy * gradient->matrix.m10;
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t *= (COLOR_TABLE_SIZE - 1);
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inc *= (COLOR_TABLE_SIZE - 1);
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}
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const uint32_t* end = buffer + length;
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if(inc > -1e-5 && inc < 1e-5)
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{
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memfill32(buffer, gradient_pixel_fixed(gradient, (int)(t * FIXPT_SIZE)), length);
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}
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else
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{
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if(t + inc * length < (double)(INT_MAX >> (FIXPT_BITS + 1)) && t + inc * length > (double)(INT_MIN >> (FIXPT_BITS + 1)))
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{
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int t_fixed = (int)(t * FIXPT_SIZE);
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int inc_fixed = (int)(inc * FIXPT_SIZE);
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while(buffer < end)
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{
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*buffer = gradient_pixel_fixed(gradient, t_fixed);
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t_fixed += inc_fixed;
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++buffer;
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}
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}
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else
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{
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while(buffer < end)
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{
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*buffer = gradient_pixel(gradient, t / COLOR_TABLE_SIZE);
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t += inc;
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++buffer;
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}
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}
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}
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}
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static void fetch_radial_gradient(uint32_t* buffer, const radial_gradient_values_t* v, const gradient_data_t* gradient, int y, int x, int length)
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{
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if(v->a == 0.0)
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{
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memfill32(buffer, 0, length);
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return;
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}
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double rx = gradient->matrix.m01 * (y + 0.5) + gradient->matrix.m02 + gradient->matrix.m00 * (x + 0.5);
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double ry = gradient->matrix.m11 * (y + 0.5) + gradient->matrix.m12 + gradient->matrix.m10 * (x + 0.5);
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rx -= gradient->radial.fx;
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ry -= gradient->radial.fy;
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double inv_a = 1 / (2 * v->a);
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double delta_rx = gradient->matrix.m00;
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double delta_ry = gradient->matrix.m10;
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double b = 2 * (v->dr * gradient->radial.fr + rx * v->dx + ry * v->dy);
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double delta_b = 2 * (delta_rx * v->dx + delta_ry * v->dy);
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double b_delta_b = 2 * b * delta_b;
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double delta_b_delta_b = 2 * delta_b * delta_b;
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double bb = b * b;
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double delta_bb = delta_b * delta_b;
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b *= inv_a;
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delta_b *= inv_a;
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double rxrxryry = rx * rx + ry * ry;
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double delta_rxrxryry = delta_rx * delta_rx + delta_ry * delta_ry;
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double rx_plus_ry = 2 * (rx * delta_rx + ry * delta_ry);
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double delta_rx_plus_ry = 2 * delta_rxrxryry;
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inv_a *= inv_a;
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double det = (bb - 4 * v->a * (v->sqrfr - rxrxryry)) * inv_a;
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double delta_det = (b_delta_b + delta_bb + 4 * v->a * (rx_plus_ry + delta_rxrxryry)) * inv_a;
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double delta_delta_det = (delta_b_delta_b + 4 * v->a * delta_rx_plus_ry) * inv_a;
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const uint32_t* end = buffer + length;
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if(v->extended)
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{
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while(buffer < end)
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{
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uint32_t result = 0;
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det = fabs(det) < DBL_EPSILON ? 0.0 : det;
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if(det >= 0)
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{
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double w = sqrt(det) - b;
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if(gradient->radial.fr + v->dr * w >= 0)
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result = gradient_pixel(gradient, w);
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}
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*buffer = result;
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det += delta_det;
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delta_det += delta_delta_det;
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b += delta_b;
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++buffer;
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}
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}
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else
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{
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while(buffer < end)
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{
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det = fabs(det) < DBL_EPSILON ? 0.0 : det;
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uint32_t result = 0;
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if (det >= 0)
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result = gradient_pixel(gradient, sqrt(det) - b);
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*buffer++ = result;
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det += delta_det;
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delta_det += delta_delta_det;
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b += delta_b;
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}
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}
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}
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static void composition_solid_source(uint32_t* dest, int length, uint32_t color, uint32_t alpha)
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{
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if(alpha == 255)
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{
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memfill32(dest, color, length);
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}
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else
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{
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uint32_t ialpha = 255 - alpha;
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color = BYTE_MUL(color, alpha);
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for(int i = 0;i < length;i++)
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dest[i] = color + BYTE_MUL(dest[i], ialpha);
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}
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}
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static void composition_solid_source_over(uint32_t* dest, int length, uint32_t color, uint32_t const_alpha)
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{
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if(const_alpha != 255) color = BYTE_MUL(color, const_alpha);
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uint32_t ialpha = 255 - plutovg_alpha(color);
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for(int i = 0;i < length;i++)
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dest[i] = color + BYTE_MUL(dest[i], ialpha);
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}
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static void composition_solid_destination_in(uint32_t* dest, int length, uint32_t color, uint32_t const_alpha)
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{
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uint32_t a = plutovg_alpha(color);
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if(const_alpha != 255) a = BYTE_MUL(a, const_alpha) + 255 - const_alpha;
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for(int i = 0;i < length;i++)
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dest[i] = BYTE_MUL(dest[i], a);
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}
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static void composition_solid_destination_out(uint32_t* dest, int length, uint32_t color, uint32_t const_alpha)
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{
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uint32_t a = plutovg_alpha(~color);
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if(const_alpha != 255) a = BYTE_MUL(a, const_alpha) + 255 - const_alpha;
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for(int i = 0; i < length;i++)
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dest[i] = BYTE_MUL(dest[i], a);
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}
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static void composition_source(uint32_t* dest, int length, const uint32_t* src, uint32_t const_alpha)
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{
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if(const_alpha == 255)
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{
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memcpy(dest, src, (size_t)(length) * sizeof(uint32_t));
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}
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else
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{
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uint32_t ialpha = 255 - const_alpha;
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for(int i = 0;i < length;i++)
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dest[i] = interpolate_pixel(src[i], const_alpha, dest[i], ialpha);
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}
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}
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static void composition_source_over(uint32_t* dest, int length, const uint32_t* src, uint32_t const_alpha)
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{
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uint32_t s, sia;
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if(const_alpha == 255)
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{
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for(int i = 0;i < length;i++)
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{
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s = src[i];
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if(s >= 0xff000000)
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dest[i] = s;
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else if(s != 0)
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{
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sia = plutovg_alpha(~s);
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dest[i] = s + BYTE_MUL(dest[i], sia);
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}
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}
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}
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else
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{
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for(int i = 0;i < length;i++)
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{
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s = BYTE_MUL(src[i], const_alpha);
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sia = plutovg_alpha(~s);
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dest[i] = s + BYTE_MUL(dest[i], sia);
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}
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}
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}
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static void composition_destination_in(uint32_t* dest, int length, const uint32_t* src, uint32_t const_alpha)
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{
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if(const_alpha == 255)
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{
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for(int i = 0; i < length;i++)
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dest[i] = BYTE_MUL(dest[i], plutovg_alpha(src[i]));
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}
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else
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{
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uint32_t cia = 255 - const_alpha;
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uint32_t a;
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for(int i = 0;i < length;i++)
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{
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a = BYTE_MUL(plutovg_alpha(src[i]), const_alpha) + cia;
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dest[i] = BYTE_MUL(dest[i], a);
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}
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}
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}
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static void composition_destination_out(uint32_t* dest, int length, const uint32_t* src, uint32_t const_alpha)
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{
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if(const_alpha == 255)
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{
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for(int i = 0;i < length;i++)
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dest[i] = BYTE_MUL(dest[i], plutovg_alpha(~src[i]));
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}
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else
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{
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uint32_t cia = 255 - const_alpha;
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uint32_t sia;
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for(int i = 0;i < length;i++)
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{
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sia = BYTE_MUL(plutovg_alpha(~src[i]), const_alpha) + cia;
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dest[i] = BYTE_MUL(dest[i], sia);
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}
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}
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}
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typedef void(*composition_solid_function_t)(uint32_t* dest, int length, uint32_t color, uint32_t const_alpha);
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typedef void(*composition_function_t)(uint32_t* dest, int length, const uint32_t* src, uint32_t const_alpha);
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static const composition_solid_function_t composition_solid_map[] = {
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composition_solid_source,
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composition_solid_source_over,
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composition_solid_destination_in,
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composition_solid_destination_out
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};
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static const composition_function_t composition_map[] = {
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composition_source,
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composition_source_over,
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composition_destination_in,
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composition_destination_out
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};
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static void blend_solid(plutovg_surface_t* surface, plutovg_operator_t op, const plutovg_rle_t* rle, uint32_t solid)
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{
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composition_solid_function_t func = composition_solid_map[op];
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int count = rle->spans.size;
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const plutovg_span_t* spans = rle->spans.data;
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while(count--)
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{
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uint32_t* target = (uint32_t*)(surface->data + spans->y * surface->stride) + spans->x;
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func(target, spans->len, solid, spans->coverage);
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++spans;
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}
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}
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#define BUFFER_SIZE 1024
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static void blend_linear_gradient(plutovg_surface_t* surface, plutovg_operator_t op, const plutovg_rle_t* rle, const gradient_data_t* gradient)
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{
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composition_function_t func = composition_map[op];
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unsigned int buffer[BUFFER_SIZE];
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linear_gradient_values_t v;
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v.dx = gradient->linear.x2 - gradient->linear.x1;
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v.dy = gradient->linear.y2 - gradient->linear.y1;
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v.l = v.dx * v.dx + v.dy * v.dy;
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v.off = 0.0;
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if(v.l != 0.0)
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{
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v.dx /= v.l;
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v.dy /= v.l;
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v.off = -v.dx * gradient->linear.x1 - v.dy * gradient->linear.y1;
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}
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int count = rle->spans.size;
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const plutovg_span_t* spans = rle->spans.data;
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while(count--)
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{
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int length = spans->len;
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int x = spans->x;
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while(length)
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{
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int l = plutovg_min(length, BUFFER_SIZE);
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fetch_linear_gradient(buffer, &v, gradient, spans->y, x, l);
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uint32_t* target = (uint32_t*)(surface->data + spans->y * surface->stride) + x;
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func(target, l, buffer, spans->coverage);
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x += l;
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length -= l;
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}
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++spans;
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}
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}
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static void blend_radial_gradient(plutovg_surface_t* surface, plutovg_operator_t op, const plutovg_rle_t* rle, const gradient_data_t* gradient)
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{
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composition_function_t func = composition_map[op];
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unsigned int buffer[BUFFER_SIZE];
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radial_gradient_values_t v;
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v.dx = gradient->radial.cx - gradient->radial.fx;
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v.dy = gradient->radial.cy - gradient->radial.fy;
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v.dr = gradient->radial.cr - gradient->radial.fr;
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v.sqrfr = gradient->radial.fr * gradient->radial.fr;
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v.a = v.dr * v.dr - v.dx * v.dx - v.dy * v.dy;
|
|
v.inv2a = 1.0 / (2.0 * v.a);
|
|
v.extended = gradient->radial.fr != 0.0 || v.a <= 0.0;
|
|
|
|
int count = rle->spans.size;
|
|
const plutovg_span_t* spans = rle->spans.data;
|
|
while(count--)
|
|
{
|
|
int length = spans->len;
|
|
int x = spans->x;
|
|
while(length)
|
|
{
|
|
int l = plutovg_min(length, BUFFER_SIZE);
|
|
fetch_radial_gradient(buffer, &v, gradient, spans->y, x, l);
|
|
uint32_t* target = (uint32_t*)(surface->data + spans->y * surface->stride) + x;
|
|
func(target, l, buffer, spans->coverage);
|
|
x += l;
|
|
length -= l;
|
|
}
|
|
|
|
++spans;
|
|
}
|
|
}
|
|
|
|
#define FIXED_SCALE (1 << 16)
|
|
static void blend_transformed_argb(plutovg_surface_t* surface, plutovg_operator_t op, const plutovg_rle_t* rle, const texture_data_t* texture)
|
|
{
|
|
composition_function_t func = composition_map[op];
|
|
uint32_t buffer[BUFFER_SIZE];
|
|
|
|
int image_width = texture->width;
|
|
int image_height = texture->height;
|
|
|
|
int fdx = (int)(texture->matrix.m00 * FIXED_SCALE);
|
|
int fdy = (int)(texture->matrix.m10 * FIXED_SCALE);
|
|
|
|
int count = rle->spans.size;
|
|
const plutovg_span_t* spans = rle->spans.data;
|
|
while(count--)
|
|
{
|
|
uint32_t* target = (uint32_t*)(surface->data + spans->y * surface->stride) + spans->x;
|
|
|
|
const double cx = spans->x + 0.5;
|
|
const double cy = spans->y + 0.5;
|
|
|
|
int x = (int)((texture->matrix.m01 * cy + texture->matrix.m00 * cx + texture->matrix.m02) * FIXED_SCALE);
|
|
int y = (int)((texture->matrix.m11 * cy + texture->matrix.m10 * cx + texture->matrix.m12) * FIXED_SCALE);
|
|
|
|
int length = spans->len;
|
|
const int coverage = (spans->coverage * texture->const_alpha) >> 8;
|
|
while(length)
|
|
{
|
|
int l = plutovg_min(length, BUFFER_SIZE);
|
|
const uint32_t* end = buffer + l;
|
|
uint32_t* b = buffer;
|
|
while(b < end)
|
|
{
|
|
int px = plutovg_clamp(x >> 16, 0, image_width - 1);
|
|
int py = plutovg_clamp(y >> 16, 0, image_height - 1);
|
|
*b = ((const uint32_t*)(texture->data + py * texture->stride))[px];
|
|
|
|
x += fdx;
|
|
y += fdy;
|
|
++b;
|
|
}
|
|
|
|
func(target, l, buffer, coverage);
|
|
target += l;
|
|
length -= l;
|
|
}
|
|
|
|
++spans;
|
|
}
|
|
}
|
|
|
|
static void blend_untransformed_argb(plutovg_surface_t* surface, plutovg_operator_t op, const plutovg_rle_t* rle, const texture_data_t* texture)
|
|
{
|
|
composition_function_t func = composition_map[op];
|
|
|
|
const int image_width = texture->width;
|
|
const int image_height = texture->height;
|
|
|
|
int xoff = (int)(texture->matrix.m02);
|
|
int yoff = (int)(texture->matrix.m12);
|
|
|
|
int count = rle->spans.size;
|
|
const plutovg_span_t* spans = rle->spans.data;
|
|
while(count--)
|
|
{
|
|
int x = spans->x;
|
|
int length = spans->len;
|
|
int sx = xoff + x;
|
|
int sy = yoff + spans->y;
|
|
if(sy >= 0 && sy < image_height && sx < image_width)
|
|
{
|
|
if(sx < 0)
|
|
{
|
|
x -= sx;
|
|
length += sx;
|
|
sx = 0;
|
|
}
|
|
if(sx + length > image_width) length = image_width - sx;
|
|
if(length > 0)
|
|
{
|
|
const int coverage = (spans->coverage * texture->const_alpha) >> 8;
|
|
const uint32_t* src = (const uint32_t*)(texture->data + sy * texture->stride) + sx;
|
|
uint32_t* dest = (uint32_t*)(surface->data + spans->y * surface->stride) + x;
|
|
func(dest, length, src, coverage);
|
|
}
|
|
}
|
|
|
|
++spans;
|
|
}
|
|
}
|
|
|
|
static void blend_untransformed_tiled_argb(plutovg_surface_t* surface, plutovg_operator_t op, const plutovg_rle_t* rle, const texture_data_t* texture)
|
|
{
|
|
composition_function_t func = composition_map[op];
|
|
|
|
int image_width = texture->width;
|
|
int image_height = texture->height;
|
|
|
|
int xoff = (int)(texture->matrix.m02) % image_width;
|
|
int yoff = (int)(texture->matrix.m12) % image_height;
|
|
|
|
if(xoff < 0)
|
|
xoff += image_width;
|
|
if(yoff < 0)
|
|
yoff += image_height;
|
|
|
|
int count = rle->spans.size;
|
|
const plutovg_span_t* spans = rle->spans.data;
|
|
while(count--)
|
|
{
|
|
int x = spans->x;
|
|
int length = spans->len;
|
|
int sx = (xoff + spans->x) % image_width;
|
|
int sy = (spans->y + yoff) % image_height;
|
|
if(sx < 0)
|
|
sx += image_width;
|
|
if(sy < 0)
|
|
sy += image_height;
|
|
|
|
const int coverage = (spans->coverage * texture->const_alpha) >> 8;
|
|
while(length)
|
|
{
|
|
int l = plutovg_min(image_width - sx, length);
|
|
if(BUFFER_SIZE < l)
|
|
l = BUFFER_SIZE;
|
|
const uint32_t* src = (const uint32_t*)(texture->data + sy * texture->stride) + sx;
|
|
uint32_t* dest = (uint32_t*)(surface->data + spans->y * surface->stride) + x;
|
|
func(dest, l, src, coverage);
|
|
x += l;
|
|
length -= l;
|
|
sx = 0;
|
|
}
|
|
|
|
++spans;
|
|
}
|
|
}
|
|
|
|
static void blend_transformed_tiled_argb(plutovg_surface_t* surface, plutovg_operator_t op, const plutovg_rle_t* rle, const texture_data_t* texture)
|
|
{
|
|
composition_function_t func = composition_map[op];
|
|
uint32_t buffer[BUFFER_SIZE];
|
|
|
|
int image_width = texture->width;
|
|
int image_height = texture->height;
|
|
const int scanline_offset = texture->stride / 4;
|
|
|
|
int fdx = (int)(texture->matrix.m00 * FIXED_SCALE);
|
|
int fdy = (int)(texture->matrix.m10 * FIXED_SCALE);
|
|
|
|
int count = rle->spans.size;
|
|
const plutovg_span_t* spans = rle->spans.data;
|
|
while(count--)
|
|
{
|
|
uint32_t* target = (uint32_t*)(surface->data + spans->y * surface->stride) + spans->x;
|
|
const uint32_t* image_bits = (const uint32_t*)texture->data;
|
|
|
|
const double cx = spans->x + 0.5;
|
|
const double cy = spans->y + 0.5;
|
|
|
|
int x = (int)((texture->matrix.m01 * cy + texture->matrix.m00 * cx + texture->matrix.m02) * FIXED_SCALE);
|
|
int y = (int)((texture->matrix.m11 * cy + texture->matrix.m10 * cx + texture->matrix.m12) * FIXED_SCALE);
|
|
|
|
const int coverage = (spans->coverage * texture->const_alpha) >> 8;
|
|
int length = spans->len;
|
|
while(length)
|
|
{
|
|
int l = plutovg_min(length, BUFFER_SIZE);
|
|
const uint32_t* end = buffer + l;
|
|
uint32_t* b = buffer;
|
|
int px16 = x % (image_width << 16);
|
|
int py16 = y % (image_height << 16);
|
|
int px_delta = fdx % (image_width << 16);
|
|
int py_delta = fdy % (image_height << 16);
|
|
while(b < end)
|
|
{
|
|
if(px16 < 0) px16 += image_width << 16;
|
|
if(py16 < 0) py16 += image_height << 16;
|
|
int px = px16 >> 16;
|
|
int py = py16 >> 16;
|
|
int y_offset = py * scanline_offset;
|
|
|
|
*b = image_bits[y_offset + px];
|
|
x += fdx;
|
|
y += fdy;
|
|
px16 += px_delta;
|
|
if(px16 >= image_width << 16)
|
|
px16 -= image_width << 16;
|
|
py16 += py_delta;
|
|
if(py16 >= image_height << 16)
|
|
py16 -= image_height << 16;
|
|
++b;
|
|
}
|
|
|
|
func(target, l, buffer, coverage);
|
|
target += l;
|
|
length -= l;
|
|
}
|
|
|
|
++spans;
|
|
}
|
|
}
|
|
|
|
void plutovg_blend(plutovg_t* pluto, const plutovg_rle_t* rle)
|
|
{
|
|
plutovg_paint_t* source = &pluto->state->paint;
|
|
if(source->type == plutovg_paint_type_color)
|
|
plutovg_blend_color(pluto, rle, &source->color);
|
|
else if(source->type == plutovg_paint_type_gradient)
|
|
plutovg_blend_gradient(pluto, rle, &source->gradient);
|
|
else
|
|
plutovg_blend_texture(pluto, rle, &source->texture);
|
|
}
|
|
|
|
void plutovg_blend_color(plutovg_t* pluto, const plutovg_rle_t* rle, const plutovg_color_t* color)
|
|
{
|
|
plutovg_state_t* state = pluto->state;
|
|
uint32_t solid = premultiply_color(color, state->opacity);
|
|
|
|
uint32_t alpha = plutovg_alpha(solid);
|
|
if(alpha == 255 && state->op == plutovg_operator_src_over)
|
|
blend_solid(pluto->surface, plutovg_operator_src, rle, solid);
|
|
else
|
|
blend_solid(pluto->surface, state->op, rle, solid);
|
|
}
|
|
|
|
void plutovg_blend_gradient(plutovg_t* pluto, const plutovg_rle_t* rle, const plutovg_gradient_t* gradient)
|
|
{
|
|
plutovg_state_t* state = pluto->state;
|
|
gradient_data_t data;
|
|
int i, pos = 0, nstop = gradient->stops.size;
|
|
const plutovg_gradient_stop_t *curr, *next, *start, *last;
|
|
uint32_t curr_color, next_color, last_color;
|
|
uint32_t dist, idist;
|
|
double delta, t, incr, fpos;
|
|
double opacity = state->opacity * gradient->opacity;
|
|
|
|
start = gradient->stops.data;
|
|
curr = start;
|
|
curr_color = combine_opacity(&curr->color, opacity);
|
|
|
|
data.colortable[pos] = premultiply_pixel(curr_color);
|
|
++pos;
|
|
incr = 1.0 / COLOR_TABLE_SIZE;
|
|
fpos = 1.5 * incr;
|
|
|
|
while(fpos <= curr->offset)
|
|
{
|
|
data.colortable[pos] = data.colortable[pos - 1];
|
|
++pos;
|
|
fpos += incr;
|
|
}
|
|
|
|
for(i = 0;i < nstop - 1;i++)
|
|
{
|
|
curr = (start + i);
|
|
next = (start + i + 1);
|
|
delta = 1.0 / (next->offset - curr->offset);
|
|
next_color = combine_opacity(&next->color, opacity);
|
|
while(fpos < next->offset && pos < COLOR_TABLE_SIZE)
|
|
{
|
|
t = (fpos - curr->offset) * delta;
|
|
dist = (uint32_t)(255 * t);
|
|
idist = 255 - dist;
|
|
data.colortable[pos] = premultiply_pixel(interpolate_pixel(curr_color, idist, next_color, dist));
|
|
++pos;
|
|
fpos += incr;
|
|
}
|
|
|
|
curr_color = next_color;
|
|
}
|
|
|
|
last = start + nstop - 1;
|
|
last_color = premultiply_color(&last->color, opacity);
|
|
for(;pos < COLOR_TABLE_SIZE;++pos)
|
|
data.colortable[pos] = last_color;
|
|
|
|
data.spread = gradient->spread;
|
|
data.matrix = gradient->matrix;
|
|
plutovg_matrix_multiply(&data.matrix, &data.matrix, &state->matrix);
|
|
plutovg_matrix_invert(&data.matrix);
|
|
|
|
if(gradient->type==plutovg_gradient_type_linear)
|
|
{
|
|
data.linear.x1 = gradient->values[0];
|
|
data.linear.y1 = gradient->values[1];
|
|
data.linear.x2 = gradient->values[2];
|
|
data.linear.y2 = gradient->values[3];
|
|
blend_linear_gradient(pluto->surface, state->op, rle, &data);
|
|
}
|
|
else
|
|
{
|
|
data.radial.cx = gradient->values[0];
|
|
data.radial.cy = gradient->values[1];
|
|
data.radial.cr = gradient->values[2];
|
|
data.radial.fx = gradient->values[3];
|
|
data.radial.fy = gradient->values[4];
|
|
data.radial.fr = gradient->values[5];
|
|
blend_radial_gradient(pluto->surface, state->op, rle, &data);
|
|
}
|
|
}
|
|
|
|
void plutovg_blend_texture(plutovg_t* pluto, const plutovg_rle_t* rle, const plutovg_texture_t* texture)
|
|
{
|
|
plutovg_state_t* state = pluto->state;
|
|
texture_data_t data;
|
|
data.data = texture->surface->data;
|
|
data.width = texture->surface->width;
|
|
data.height = texture->surface->height;
|
|
data.stride = texture->surface->stride;
|
|
data.const_alpha = (int)(state->opacity * texture->opacity * 256.0);
|
|
|
|
data.matrix = texture->matrix;
|
|
plutovg_matrix_multiply(&data.matrix, &data.matrix, &state->matrix);
|
|
plutovg_matrix_invert(&data.matrix);
|
|
|
|
const plutovg_matrix_t* matrix = &data.matrix;
|
|
int translating = (matrix->m00==1.0 && matrix->m10==0.0 && matrix->m01==0.0 && matrix->m11==1.0);
|
|
if(translating)
|
|
{
|
|
if(texture->type==plutovg_texture_type_plain)
|
|
blend_untransformed_argb(pluto->surface, state->op, rle, &data);
|
|
else
|
|
blend_untransformed_tiled_argb(pluto->surface, state->op, rle, &data);
|
|
}
|
|
else
|
|
{
|
|
if(texture->type==plutovg_texture_type_plain)
|
|
blend_transformed_argb(pluto->surface, state->op, rle, &data);
|
|
else
|
|
blend_transformed_tiled_argb(pluto->surface, state->op, rle, &data);
|
|
}
|
|
}
|