forked from enlightenment/efl
518 lines
15 KiB
C
518 lines
15 KiB
C
#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <Eina.h>
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#include <Ector.h>
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#include <software/Ector_Software.h>
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#include "ector_private.h"
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#include "ector_software_private.h"
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#include "ector_blend_private.h"
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static void
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_blend_color_argb(int count, const SW_FT_Span *spans, void *user_data)
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{
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Span_Data *data = (Span_Data *)(user_data);
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// multiply the color with mul_col if any
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uint color = ECTOR_MUL4_SYM(data->color, data->mul_col);
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Eina_Bool solid_source = ((color >> 24) == 255);
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// move to the offset location
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uint *buffer = data->raster_buffer.buffer + (data->raster_buffer.width * data->offy + data->offx);
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if (solid_source)
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{
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while (count--)
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{
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uint *target = buffer + (data->raster_buffer.width * spans->y + spans->x);
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if (spans->coverage == 255)
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{
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_ector_memfill(target, color, spans->len);
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}
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else
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{
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uint c = ECTOR_MUL_256(color, spans->coverage);
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int ialpha = 255 - spans->coverage;
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for (int i = 0; i < spans->len; ++i)
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target[i] = c + ECTOR_MUL_256(target[i], ialpha);
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}
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++spans;
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}
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return;
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}
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while (count--)
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{
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uint *target = buffer + (data->raster_buffer.width * spans->y + spans->x);
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uint c = ECTOR_MUL_256(color, spans->coverage);
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int ialpha = (~c) >> 24;
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for (int i = 0; i < spans->len; ++i)
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target[i] = c + ECTOR_MUL_256(target[i], ialpha);
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++spans;
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}
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}
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int buffer_size = 2048;
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typedef void (*src_fetch) (unsigned int *buffer, Span_Data *data, int y, int x, int length);
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static void
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_blend_gradient(int count, const SW_FT_Span *spans, void *user_data)
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{
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Span_Data *data = (Span_Data *)(user_data);
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src_fetch fetchfunc = NULL;
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if(data->type == LinearGradient) fetchfunc = &fetch_linear_gradient;
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if(data->type == RadialGradient) fetchfunc = &fetch_radial_gradient;
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unsigned int buffer[buffer_size];
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// move to the offset location
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unsigned int *destbuffer = data->raster_buffer.buffer + (data->raster_buffer.width * data->offy + data->offx);
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while (count--)
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{
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unsigned int *target = destbuffer + (data->raster_buffer.width * spans->y + spans->x);
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int length = spans->len;
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while (length)
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{
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int l = MIN(length, buffer_size);
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if (fetchfunc)
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fetchfunc(buffer, data, spans->y, spans->x, l);
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if (data->mul_col == 0xffffffff)
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_ector_comp_func_source_over(target, buffer, l, spans->coverage); // TODO use proper composition func
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else
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_ector_comp_func_source_over_mul_c(target, buffer, data->mul_col, l, spans->coverage);
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target += 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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/*!
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\internal
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spans must be sorted on y
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*/
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static const
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SW_FT_Span *_intersect_spans_rect(const Eina_Rectangle *clip, const SW_FT_Span *spans, const SW_FT_Span *end,
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SW_FT_Span **out_spans, int available)
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{
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SW_FT_Span *out = *out_spans;
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const short minx = clip->x;
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const short miny = clip->y;
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const short maxx = minx + clip->w - 1;
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const short maxy = miny + clip->h - 1;
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while (available && spans < end )
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{
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if (spans->y > maxy)
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{
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spans = end;// update spans so that we can breakout
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break;
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}
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if (spans->y < miny
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|| spans->x > maxx
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|| spans->x + spans->len <= minx)
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{
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++spans;
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continue;
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}
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if (spans->x < minx)
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{
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out->len = MIN(spans->len - (minx - spans->x), maxx - minx + 1);
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out->x = minx;
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}
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else
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{
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out->x = spans->x;
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out->len = MIN(spans->len, (maxx - spans->x + 1));
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}
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if (out->len != 0)
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{
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out->y = spans->y;
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out->coverage = spans->coverage;
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++out;
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}
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++spans;
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--available;
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}
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*out_spans = out;
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return spans;
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}
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static inline int
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_div_255(int x) { return (x + (x>>8) + 0x80) >> 8; }
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static const
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SW_FT_Span *_intersect_spans_region(const Shape_Rle_Data *clip, int *currentClip,
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const SW_FT_Span *spans, const SW_FT_Span *end,
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SW_FT_Span **out_spans, int available)
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{
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SW_FT_Span *out = *out_spans;
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const SW_FT_Span *clipSpans = clip->spans + *currentClip;
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const SW_FT_Span *clipEnd = clip->spans + clip->size;
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while (available && spans < end ) {
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if (clipSpans >= clipEnd) {
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spans = end;
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break;
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}
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if (clipSpans->y > spans->y) {
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++spans;
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continue;
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}
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if (spans->y != clipSpans->y) {
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++clipSpans;
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continue;
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}
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//assert(spans->y == clipSpans->y);
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int sx1 = spans->x;
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int sx2 = sx1 + spans->len;
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int cx1 = clipSpans->x;
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int cx2 = cx1 + clipSpans->len;
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if (cx1 < sx1 && cx2 < sx1) {
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++clipSpans;
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continue;
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} else if (sx1 < cx1 && sx2 < cx1) {
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++spans;
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continue;
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}
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int x = MAX(sx1, cx1);
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int len = MIN(sx2, cx2) - x;
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if (len) {
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out->x = MAX(sx1, cx1);
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out->len = MIN(sx2, cx2) - out->x;
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out->y = spans->y;
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out->coverage = _div_255(spans->coverage * clipSpans->coverage);
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++out;
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--available;
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}
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if (sx2 < cx2) {
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++spans;
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} else {
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++clipSpans;
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}
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}
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*out_spans = out;
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*currentClip = clipSpans - clip->spans;
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return spans;
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}
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static void
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_span_fill_clipRect(int span_count, const SW_FT_Span *spans, void *user_data)
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{
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const int NSPANS = 256;
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int clip_count, i;
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SW_FT_Span cspans[NSPANS];
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Span_Data *fill_data = (Span_Data *) user_data;
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Clip_Data clip = fill_data->clip;
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clip_count = eina_array_count(clip.clips);
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for (i = 0; i < clip_count ; i ++)
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{
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Eina_Rectangle *rect = (Eina_Rectangle *)eina_array_data_get(clip.clips, i);
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Eina_Rectangle tmpRect;
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// invert transform the offset
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tmpRect.x = rect->x - fill_data->offx;
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tmpRect.y = rect->y - fill_data->offy;
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tmpRect.w = rect->w;
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tmpRect.h = rect->h;
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const SW_FT_Span *end = spans + span_count;
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while (spans < end)
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{
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SW_FT_Span *clipped = cspans;
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spans = _intersect_spans_rect(&tmpRect,spans, end, &clipped, NSPANS);
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if (clipped - cspans)
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fill_data->unclipped_blend(clipped - cspans, cspans, fill_data);
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}
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}
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}
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static void
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_span_fill_clipPath(int span_count, const SW_FT_Span *spans, void *user_data)
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{
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const int NSPANS = 256;
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int current_clip = 0;
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SW_FT_Span cspans[NSPANS];
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Span_Data *fill_data = (Span_Data *) user_data;
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Clip_Data clip = fill_data->clip;
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//TODO take clip path offset into account.
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const SW_FT_Span *end = spans + span_count;
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while (spans < end)
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{
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SW_FT_Span *clipped = cspans;
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spans = _intersect_spans_region(clip.path, ¤t_clip, spans, end, &clipped, NSPANS);
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if (clipped - cspans)
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fill_data->unclipped_blend(clipped - cspans, cspans, fill_data);
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}
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}
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static void
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_adjust_span_fill_methods(Span_Data *spdata)
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{
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switch(spdata->type)
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{
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case None:
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spdata->unclipped_blend = 0;
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break;
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case Solid:
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spdata->unclipped_blend = &_blend_color_argb;
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break;
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case LinearGradient:
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case RadialGradient:
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spdata->unclipped_blend = &_blend_gradient;
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break;
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case Image:
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spdata->unclipped_blend = 0;//&_blend_image;
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break;
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}
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// setup clipping
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if (!spdata->unclipped_blend)
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{
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spdata->blend = 0;
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}
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else if (!spdata->clip.enabled)
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{
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spdata->blend = spdata->unclipped_blend;
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}
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else if (spdata->clip.has_rect_clip)
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{
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spdata->blend = &_span_fill_clipRect;
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}
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else
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{
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spdata->blend = &_span_fill_clipPath;
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}
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}
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void ector_software_rasterizer_init(Software_Rasterizer *rasterizer)
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{
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// initialize the rasterizer and stroker
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unsigned char* renderPool = (unsigned char*) malloc(1024 * 100);
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sw_ft_grays_raster.raster_new(&rasterizer->raster);
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sw_ft_grays_raster.raster_reset(rasterizer->raster, renderPool, 1024*100);
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SW_FT_Stroker_New(&rasterizer->stroker);
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SW_FT_Stroker_Set(rasterizer->stroker, 1<<6,SW_FT_STROKER_LINECAP_BUTT,SW_FT_STROKER_LINEJOIN_MITER,0);
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//initialize the span data.
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rasterizer->fill_data.raster_buffer.buffer = NULL;
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rasterizer->fill_data.clip.enabled = EINA_FALSE;
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rasterizer->fill_data.unclipped_blend = 0;
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rasterizer->fill_data.blend = 0;
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}
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void ector_software_rasterizer_done(Software_Rasterizer *rasterizer)
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{
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sw_ft_grays_raster.raster_done(rasterizer->raster);
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SW_FT_Stroker_Done(rasterizer->stroker);
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//TODO free the pool memory
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}
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void ector_software_rasterizer_stroke_set(Software_Rasterizer *rasterizer, double width,
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Efl_Gfx_Cap cap_style, Efl_Gfx_Join join_style)
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{
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SW_FT_Stroker_LineCap cap;
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SW_FT_Stroker_LineJoin join;
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switch (cap_style)
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{
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case EFL_GFX_CAP_SQUARE:
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cap = SW_FT_STROKER_LINECAP_SQUARE;
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break;
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case EFL_GFX_CAP_ROUND:
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cap = SW_FT_STROKER_LINECAP_ROUND;
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break;
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default:
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cap = SW_FT_STROKER_LINECAP_BUTT;
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break;
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}
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switch (join_style)
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{
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case EFL_GFX_JOIN_BEVEL:
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join = SW_FT_STROKER_LINEJOIN_BEVEL;
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break;
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case EFL_GFX_JOIN_ROUND:
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join = SW_FT_STROKER_LINEJOIN_ROUND;
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break;
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default:
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join = SW_FT_STROKER_LINEJOIN_MITER;
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break;
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}
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int stroke_width = (int)(width * 64);
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SW_FT_Stroker_Set(rasterizer->stroker, stroke_width, cap, join, 0);
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}
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static void
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_rle_generation_cb( int count, const SW_FT_Span* spans,void *user)
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{
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Shape_Rle_Data *rle = (Shape_Rle_Data *) user;
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int newsize = rle->size + count;
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// allocate enough memory for new spans
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// alloc is required to prevent free and reallocation
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// when the rle needs to be regenerated because of attribute change.
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if(rle->alloc < newsize)
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{
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rle->spans = (SW_FT_Span *) realloc(rle->spans, newsize * sizeof(SW_FT_Span));
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rle->alloc = newsize;
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}
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// copy the new spans to the allocated memory
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SW_FT_Span *lastspan = (rle->spans + rle->size);
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memcpy(lastspan,spans, count * sizeof(SW_FT_Span));
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// update the size
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rle->size = newsize;
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}
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Shape_Rle_Data *
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ector_software_rasterizer_generate_rle_data(Software_Rasterizer *rasterizer, SW_FT_Outline *outline)
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{
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Shape_Rle_Data *rle_data = (Shape_Rle_Data *) calloc(1, sizeof(Shape_Rle_Data));
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SW_FT_Raster_Params params;
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params.flags = SW_FT_RASTER_FLAG_DIRECT | SW_FT_RASTER_FLAG_AA ;
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params.gray_spans = &_rle_generation_cb;
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params.user = rle_data;
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params.source = outline;
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sw_ft_grays_raster.raster_render(rasterizer->raster, ¶ms);
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return rle_data;
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}
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Shape_Rle_Data *
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ector_software_rasterizer_generate_stroke_rle_data(Software_Rasterizer *rasterizer, SW_FT_Outline *outline, Eina_Bool closePath)
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{
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uint points,contors;
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SW_FT_Stroker_ParseOutline(rasterizer->stroker, outline, !closePath);
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SW_FT_Stroker_GetCounts(rasterizer->stroker,&points, &contors);
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SW_FT_Outline strokeOutline = {0};
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strokeOutline.points = (SW_FT_Vector *) calloc(points, sizeof(SW_FT_Vector));
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strokeOutline.tags = (char *) calloc(points, sizeof(char));
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strokeOutline.contours = (short *) calloc(contors, sizeof(short));
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SW_FT_Stroker_Export(rasterizer->stroker, &strokeOutline);
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Shape_Rle_Data *rle_data = ector_software_rasterizer_generate_rle_data(rasterizer, &strokeOutline);
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// cleanup the outline data.
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free(strokeOutline.points);
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free(strokeOutline.tags);
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free(strokeOutline.contours);
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return rle_data;
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}
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void ector_software_rasterizer_destroy_rle_data(Shape_Rle_Data *rle)
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{
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if (rle)
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{
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if (rle->spans)
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free(rle->spans);
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free(rle);
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}
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}
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static
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void _setup_span_fill_matrix(Software_Rasterizer *rasterizer)
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{
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if (rasterizer->transform)
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{
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eina_matrix3_inverse(rasterizer->transform, &rasterizer->fill_data.inv);
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}
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else
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{
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eina_matrix3_identity(&rasterizer->fill_data.inv);
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eina_matrix3_identity(&rasterizer->fill_data.inv);
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}
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}
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void ector_software_rasterizer_transform_set(Software_Rasterizer *rasterizer, Eina_Matrix3 *t)
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{
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rasterizer->transform = t;
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}
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void ector_software_rasterizer_clip_rect_set(Software_Rasterizer *rasterizer, Eina_Array *clips)
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{
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if (clips)
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{
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rasterizer->fill_data.clip.clips = clips;
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rasterizer->fill_data.clip.has_rect_clip = EINA_TRUE;
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rasterizer->fill_data.clip.enabled = EINA_TRUE;
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}
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else
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{
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rasterizer->fill_data.clip.clips = NULL;
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rasterizer->fill_data.clip.has_rect_clip = EINA_FALSE;
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rasterizer->fill_data.clip.enabled = EINA_FALSE;
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}
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}
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void ector_software_rasterizer_clip_shape_set(Software_Rasterizer *rasterizer, Shape_Rle_Data *clip)
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{
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rasterizer->fill_data.clip.path = clip;
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rasterizer->fill_data.clip.has_path_clip = EINA_TRUE;
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rasterizer->fill_data.clip.enabled = EINA_TRUE;
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}
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void ector_software_rasterizer_color_set(Software_Rasterizer *rasterizer, int r, int g, int b, int a)
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{
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rasterizer->fill_data.color = ECTOR_ARGB_JOIN(a, r, g, b);
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rasterizer->fill_data.type = Solid;
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}
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void ector_software_rasterizer_linear_gradient_set(Software_Rasterizer *rasterizer, Ector_Renderer_Software_Gradient_Data *linear)
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{
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rasterizer->fill_data.gradient = linear;
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rasterizer->fill_data.type = LinearGradient;
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}
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void ector_software_rasterizer_radial_gradient_set(Software_Rasterizer *rasterizer, Ector_Renderer_Software_Gradient_Data *radial)
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{
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rasterizer->fill_data.gradient = radial;
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rasterizer->fill_data.type = RadialGradient;
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}
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void ector_software_rasterizer_draw_rle_data(Software_Rasterizer *rasterizer,
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int x, int y, uint mul_col, Ector_Rop op, Shape_Rle_Data* rle)
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{
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// check for NULL rle data
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if (!rle) return;
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rasterizer->fill_data.offx = x;
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rasterizer->fill_data.offy = y;
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rasterizer->fill_data.mul_col = mul_col;
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rasterizer->fill_data.op = op;
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_setup_span_fill_matrix(rasterizer);
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_adjust_span_fill_methods(&rasterizer->fill_data);
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if(rasterizer->fill_data.blend)
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rasterizer->fill_data.blend(rle->size, rle->spans, &rasterizer->fill_data);
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}
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