forked from enlightenment/efl
Evas filters: Implement other masking functions
These functions differ from normal blending as they will use a mask on top of input and output buffers. So, basically they blend input+mask into a third buffer output. If output is RGBA then mask or input MUST be RGBA.
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/* Implementation of some masking functions for the software engine */
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#include "evas_common_private.h"
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#include "evas_private.h"
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#include "evas_filter.h"
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#include "evas_filter_private.h"
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#include "evas_blend_private.h"
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// Naming convention: _func_engine_incolor_maskcolor_outcolor()
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static Eina_Bool _mask_cpu_alpha_alpha_alpha(Evas_Filter_Command *cmd);
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static Eina_Bool _mask_cpu_alpha_rgba_rgba(Evas_Filter_Command *cmd);
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static Eina_Bool _mask_cpu_alpha_alpha_rgba(Evas_Filter_Command *cmd);
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static Eina_Bool _mask_cpu_rgba_alpha_rgba(Evas_Filter_Command *cmd);
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Evas_Filter_Apply_Func
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evas_filter_mask_cpu_func_get(Evas_Filter_Command *cmd)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(cmd, NULL);
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EINA_SAFETY_ON_NULL_RETURN_VAL(cmd->input, NULL);
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EINA_SAFETY_ON_NULL_RETURN_VAL(cmd->output, NULL);
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EINA_SAFETY_ON_NULL_RETURN_VAL(cmd->mask, NULL);
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EINA_SAFETY_ON_NULL_RETURN_VAL(cmd->input->backing, NULL);
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EINA_SAFETY_ON_NULL_RETURN_VAL(cmd->output->backing, NULL);
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EINA_SAFETY_ON_NULL_RETURN_VAL(cmd->mask->backing, NULL);
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EINA_SAFETY_ON_FALSE_RETURN_VAL(cmd->input->w == cmd->output->w, NULL);
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EINA_SAFETY_ON_FALSE_RETURN_VAL(cmd->input->h == cmd->output->h, NULL);
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if (cmd->input->alpha_only)
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{
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if (cmd->mask->alpha_only && cmd->output->alpha_only)
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return _mask_cpu_alpha_alpha_alpha;
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else if (!cmd->mask->alpha_only && !cmd->output->alpha_only)
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return _mask_cpu_alpha_rgba_rgba;
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else if (cmd->mask->alpha_only && !cmd->output->alpha_only)
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return _mask_cpu_alpha_alpha_rgba;
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}
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else
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{
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if (cmd->mask->alpha_only && !cmd->output->alpha_only)
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return _mask_cpu_rgba_alpha_rgba;
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else if (!cmd->mask->alpha_only && !cmd->output->alpha_only)
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return evas_filter_blend_cpu_func_get(cmd); // Check this. Merge?
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}
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CRI("If input or mask is RGBA, then output must also be RGBA: %s [%s] %s",
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cmd->input->alpha_only ? "alpha" : "rgba",
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cmd->mask->alpha_only ? "alpha" : "rgba",
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cmd->output->alpha_only ? "alpha" : "rgba");
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return NULL;
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}
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static Eina_Bool
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_mask_cpu_alpha_alpha_alpha(Evas_Filter_Command *cmd)
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{
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Alpha_Gfx_Func func;
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RGBA_Image *in, *out, *mask;
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DATA8 *src, *dst, *msk;
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int render_op = cmd->draw.render_op;
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int w, h, mw, mh, x, y, my;
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int stepsize, stepcount, step;
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/* Mechanism:
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* 1. Copy source to destination
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* 2. Render mask into destination using alpha function
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*
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* FIXME: Could probably be optimized into a single op :)
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*/
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in = (RGBA_Image *) cmd->input->backing;
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out = (RGBA_Image *) cmd->output->backing;
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mask = (RGBA_Image *) cmd->mask->backing;
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w = cmd->input->w;
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h = cmd->input->h;
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mw = cmd->mask->w;
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mh = cmd->mask->h;
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src = in->mask.data;
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dst = out->mask.data;
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msk = mask->mask.data;
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EINA_SAFETY_ON_FALSE_RETURN_VAL((w > 0) && (mw > 0), EINA_FALSE);
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stepsize = MIN(mw, w);
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stepcount = w / stepsize;
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// First pass: copy to dest
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if (src != dst)
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memcpy(dst, src, w * h * sizeof(DATA8));
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// Second pass: apply render op
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func = evas_common_alpha_func_get(render_op);
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for (y = 0, my = 0; y < h; y++, my++, msk += mw)
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{
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if (my >= mh)
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{
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my = 0;
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msk = mask->mask.data;
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}
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for (step = 0; step < stepcount; step++, dst += stepsize)
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func(msk, dst, stepsize);
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x = stepsize * stepcount;
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if (x < w)
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{
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func(msk, dst, w - x);
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dst += w - x;
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}
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}
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return EINA_TRUE;
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}
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static Eina_Bool
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_mask_cpu_rgba_alpha_rgba(Evas_Filter_Command *cmd)
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{
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Evas_Filter_Buffer *fb;
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Eina_Bool ok;
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fb = cmd->input;
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cmd->input = cmd->mask;
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cmd->mask = fb;
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ok = _mask_cpu_alpha_rgba_rgba(cmd);
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fb = cmd->input;
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cmd->input = cmd->mask;
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cmd->mask = fb;
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return ok;
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}
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static Eina_Bool
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_mask_cpu_alpha_rgba_rgba(Evas_Filter_Command *cmd)
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{
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RGBA_Gfx_Func func1, func2;
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RGBA_Image *in, *out, *mask;
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DATA8 *src;
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DATA32 *dst, *msk, *span;
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int op = cmd->draw.render_op;
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int w, h, mw, mh, x, y, my;
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int stepsize, stepcount, step;
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DATA32 color2;
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/* Mechanism:
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* 1. Render mask to span using input as mask
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* 2. Render span into destination
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*
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* FIXME: Could probably be optimized into a single op :)
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*/
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in = (RGBA_Image *) cmd->input->backing;
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out = (RGBA_Image *) cmd->output->backing;
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mask = (RGBA_Image *) cmd->mask->backing;
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w = cmd->input->w;
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h = cmd->input->h;
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mw = cmd->mask->w;
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mh = cmd->mask->h;
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src = in->mask.data;
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dst = out->image.data;
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msk = mask->image.data;
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color2 = ARGB_JOIN(cmd->draw.A, cmd->draw.R, cmd->draw.G, cmd->draw.B);
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EINA_SAFETY_ON_NULL_RETURN_VAL(src, EINA_FALSE);
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EINA_SAFETY_ON_NULL_RETURN_VAL(dst, EINA_FALSE);
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EINA_SAFETY_ON_NULL_RETURN_VAL(msk, EINA_FALSE);
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EINA_SAFETY_ON_FALSE_RETURN_VAL((w > 0) && (mw > 0), EINA_FALSE);
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stepsize = MIN(mw, w);
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stepcount = w / stepsize;
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span = malloc(stepsize * sizeof(DATA32));
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func1 = evas_common_gfx_func_composite_pixel_mask_span_get(mask, out, 1, EVAS_RENDER_COPY);
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func2 = evas_common_gfx_func_composite_pixel_color_span_get(mask, color2, out, 1, op);
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for (y = 0, my = 0; y < h; y++, my++, msk += stepsize)
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{
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if (my >= mh)
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{
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my = 0;
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msk = mask->image.data;
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}
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for (step = 0; step < stepcount; step++, dst += stepsize, src += stepsize)
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{
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memset(span, 0, stepsize * sizeof(DATA32));
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func1(msk, src, 0, span, stepsize);
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func2(span, NULL, color2, dst, stepsize);
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}
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x = stepsize * stepcount;
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if (x < w)
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{
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memset(span, 0, (w - x) * sizeof(DATA32));
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func1(msk, src, 0, span, w - x);
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func2(span, NULL, color2, dst, w - x);
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dst += w - x;
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src += w - x;
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}
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}
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free(span);
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return EINA_TRUE;
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}
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static Eina_Bool
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_mask_cpu_alpha_alpha_rgba(Evas_Filter_Command *cmd)
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{
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RGBA_Gfx_Func func;
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Alpha_Gfx_Func span_func;
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RGBA_Image *in, *out, *mask;
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DATA8 *src, *msk, *span;
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DATA32 *dst;
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DATA32 color;
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int op = cmd->draw.render_op;
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int w, h, mw, mh, x, y, my;
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int stepsize, stepcount, step;
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/* Mechanism:
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* 1. Copy mask to span buffer (1 line)
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* 2. Multiply source by span (so that: span = mask * source)
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* 3. Render span to destination using color (blend)
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*
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* FIXME: Could probably be optimized into a single op :)
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*/
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in = (RGBA_Image *) cmd->input->backing;
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out = (RGBA_Image *) cmd->output->backing;
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mask = (RGBA_Image *) cmd->mask->backing;
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w = cmd->input->w;
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h = cmd->input->h;
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mw = cmd->mask->w;
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mh = cmd->mask->h;
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src = in->mask.data;
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dst = out->image.data;
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msk = mask->mask.data;
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color = ARGB_JOIN(cmd->draw.A, cmd->draw.R, cmd->draw.G, cmd->draw.B);
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EINA_SAFETY_ON_FALSE_RETURN_VAL((w > 0) && (mw > 0), EINA_FALSE);
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stepsize = MIN(mw, w);
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stepcount = w / stepsize;
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span = malloc(stepsize * sizeof(DATA8));
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func = evas_common_gfx_func_composite_mask_color_span_get(color, out, 1, op);
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span_func = evas_common_alpha_func_get(EVAS_RENDER_MASK);
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for (y = 0, my = 0; y < h; y++, my++, msk += stepsize)
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{
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if (my >= mh)
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{
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my = 0;
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msk = mask->mask.data;
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}
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for (step = 0; step < stepcount; step++, dst += stepsize, src += stepsize)
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{
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memcpy(span, msk, stepsize * sizeof(DATA8));
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span_func(src, span, stepsize);
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func(NULL, span, color, dst, stepsize);
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}
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x = stepsize * stepcount;
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if (x < w)
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{
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memcpy(span, msk, (w - x) * sizeof(DATA8));
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span_func(src, span, w - x);
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func(NULL, span, color, dst, w - x);
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dst += w - x;
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src += w - x;
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}
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}
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free(span);
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return EINA_TRUE;
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}
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