psd_status psd_layer_effects_blend_gradient_overlay(psd_context * context, psd_layer_record * layer, psd_layer_effects * data)
{
psd_layer_effects_gradient_overlay * gradient_overlay = &data->gradient_overlay;
psd_bitmap src_bmp, dst_bmp;
psd_layer_mask_info layer_mask_info;
psd_int width, height, center_x, center_y, radius_x, radius_y, radius_corner;
psd_int corner_angle, angle;
psd_int sign_x = 1, sign_y = 1;
data->left[psd_layer_effects_type_gradient_overlay] = 0;
data->top[psd_layer_effects_type_gradient_overlay] = 0;
data->right[psd_layer_effects_type_gradient_overlay] = layer->width;
data->bottom[psd_layer_effects_type_gradient_overlay] = layer->height;
data->blend_mode[psd_layer_effects_type_gradient_overlay] = gradient_overlay->blend_mode;
data->opacity[psd_layer_effects_type_gradient_overlay] = gradient_overlay->opacity;
data->width[psd_layer_effects_type_gradient_overlay] = layer->width;
data->height[psd_layer_effects_type_gradient_overlay] = layer->height;
if(data->image_data[psd_layer_effects_type_gradient_overlay] == NULL)
{
data->image_data[psd_layer_effects_type_gradient_overlay] = (psd_argb_color *)psd_malloc(layer->width * layer->height * 4);
if(data->image_data[psd_layer_effects_type_gradient_overlay] == NULL)
return psd_status_malloc_failed;
}
src_bmp.width = layer->width;
src_bmp.height = layer->height;
src_bmp.image_data = layer->image_data;
dst_bmp.width = layer->width;
dst_bmp.height = layer->height;
dst_bmp.image_data = data->image_data[psd_layer_effects_type_gradient_overlay];
if(gradient_overlay->align_width_layer == psd_false)
{
center_x = context->width / 2 + gradient_overlay->horz_offset * context->width / 100;
center_y = context->height / 2 + gradient_overlay->vert_offset * context->height / 100;
center_x -= layer->left;
center_y -= layer->top;
corner_angle = (psd_int)(atan((psd_float)context->height / context->width) * 180 / PSD_PI + 0.5);
angle = gradient_overlay->angle;
width = (context->width * gradient_overlay->scale + 100) / 200;
height = (context->height * gradient_overlay->scale + 100) / 200;
}
else
{
center_x = layer->width / 2 + gradient_overlay->horz_offset * layer->width / 100;
center_y = layer->height / 2 + gradient_overlay->vert_offset * layer->height / 100;
corner_angle = (psd_int)(atan((psd_float)layer->height / layer->width) * 180 / PSD_PI + 0.5);
angle = gradient_overlay->angle;
width = (layer->width * gradient_overlay->scale + 100) / 200;
height = (layer->height * gradient_overlay->scale + 100) / 200;
}
if(angle < 0)
angle += 360;
if(angle >= 90 && angle < 180)
{
angle = 180 - angle;
sign_x = -1;
}
else if(angle >= 180 && angle < 270)
{
angle = angle - 180;
sign_x = -1;
sign_y = -1;
}
else if(angle >= 270 && angle <= 360)
{
angle = 360 - angle;
sign_y = -1;
}
if(angle <= corner_angle)
{
radius_x = width;
radius_y = (psd_int)(radius_x * PSD_TAN(angle) + 0.5);
}
else
{
radius_y = height;
radius_x = (psd_int)(radius_y / PSD_TAN(angle) + 0.5);
}
radius_corner = (psd_int)(psd_carm_sqrt((psd_float)(radius_x * radius_x + radius_y * radius_y)) + 0.5);
switch(gradient_overlay->style)
{
case psd_gradient_style_linear:
psd_gradient_fill_linear(&dst_bmp, &gradient_overlay->gradient_color, gradient_overlay->reverse,
center_x - sign_x * radius_x, center_y + sign_y * radius_y,
center_x + sign_x * radius_x, center_y - sign_y * radius_y);
break;
case psd_gradient_style_radial:
psd_gradient_fill_radial(&dst_bmp, &gradient_overlay->gradient_color, gradient_overlay->reverse,
center_x, center_y, radius_corner);
break;
case psd_gradient_style_angle:
psd_gradient_fill_angle(&dst_bmp, &gradient_overlay->gradient_color, gradient_overlay->reverse,
center_x, center_y, gradient_overlay->angle);
break;
case psd_gradient_style_reflected:
psd_gradient_fill_reflected(&dst_bmp, &gradient_overlay->gradient_color, gradient_overlay->reverse,
center_x - sign_x * radius_x, center_y + sign_y * radius_y,
center_x + sign_x * radius_x, center_y - sign_y * radius_y);
break;
case psd_gradient_style_diamond:
psd_gradient_fill_diamond(&dst_bmp, &gradient_overlay->gradient_color, gradient_overlay->reverse,
center_x, center_y, radius_corner, gradient_overlay->angle);
break;
default:
psd_assert(0);
break;
}
psd_bitmap_mix_alpha_channel(&dst_bmp, &src_bmp);
memcpy(&layer_mask_info, &layer->layer_mask_info, sizeof(psd_layer_mask_info));
if(layer_mask_info.disabled == psd_false && (layer_mask_info.default_color != 255 || layer_mask_info.mask_data != NULL))
{
layer_mask_info.left -= layer->left;
layer_mask_info.top -= layer->top;
layer_mask_info.right -= layer->left;
layer_mask_info.bottom -= layer->top;
psd_bitmap_blend_mask(&dst_bmp, &layer_mask_info);
}
data->valid[psd_layer_effects_type_gradient_overlay] = psd_false;
return psd_status_done;
}
psd_status psd_layer_effects_blend_stroke(psd_context * context, psd_layer_record * layer, psd_layer_effects * data)
{
psd_layer_effects_stroke * stroke = &data->stroke;
psd_int i, width, height, center_x, center_y, radius_x, radius_y, radius_corner;
psd_int corner_angle, angle;
psd_int sign_x = 1, sign_y = 1;
psd_bitmap layer_bmp, src_bmp, dst_bmp;
psd_layer_mask_info layer_mask_info;
width = layer->width + stroke->size * 2;
height = layer->height + stroke->size * 2;
data->left[psd_layer_effects_type_stroke] = -stroke->size;
data->top[psd_layer_effects_type_stroke] = -stroke->size;
data->right[psd_layer_effects_type_stroke] = layer->width + stroke->size;
data->bottom[psd_layer_effects_type_stroke] = layer->height + stroke->size;
data->blend_mode[psd_layer_effects_type_stroke] = stroke->blend_mode;
data->opacity[psd_layer_effects_type_stroke] = stroke->opacity;
if(data->image_data[psd_layer_effects_type_stroke] != NULL)
{
if(data->width[psd_layer_effects_type_stroke] != width ||
data->height[psd_layer_effects_type_stroke] != height)
{
psd_free(data->image_data[psd_layer_effects_type_stroke]);
data->image_data[psd_layer_effects_type_stroke] = (psd_argb_color *)psd_malloc(width * height * 4);
if(data->image_data[psd_layer_effects_type_stroke] == NULL)
return psd_status_malloc_failed;
}
}
else
{
data->image_data[psd_layer_effects_type_stroke] = (psd_argb_color *)psd_malloc(width * height * 4);
if(data->image_data[psd_layer_effects_type_stroke] == NULL)
return psd_status_malloc_failed;
}
data->width[psd_layer_effects_type_stroke] = width;
data->height[psd_layer_effects_type_stroke] = height;
layer_bmp.width = layer->width;
layer_bmp.height = layer->height;
layer_bmp.image_data = layer->image_data;
psd_create_bitmap(&src_bmp, width, height);
psd_inflate_bitmap(&src_bmp, &layer_bmp, stroke->size, stroke->size);
dst_bmp.width = width;
dst_bmp.height = height;
dst_bmp.image_data = data->image_data[psd_layer_effects_type_stroke];
psd_fill_bitmap(&dst_bmp, psd_color_clear);
switch(stroke->position)
{
case psd_stroke_outside:
psd_draw_stroke(&dst_bmp, &src_bmp, stroke->size * 2);
psd_bitmap_find_edge(&src_bmp, psd_true);
psd_bitmap_knock_out(&dst_bmp, &src_bmp);
break;
case psd_stroke_inside:
psd_draw_stroke(&dst_bmp, &src_bmp, stroke->size * 2);
psd_bitmap_find_edge(&src_bmp, psd_true);
psd_bitmap_reverse_alpha_channel(&src_bmp);
psd_bitmap_knock_out(&dst_bmp, &src_bmp);
break;
case psd_stroke_center:
psd_draw_stroke(&dst_bmp, &src_bmp, stroke->size);
break;
default:
psd_assert(0);
break;
}
psd_inflate_bitmap(&src_bmp, &layer_bmp, stroke->size, stroke->size);
memcpy(&layer_mask_info, &layer->layer_mask_info, sizeof(psd_layer_mask_info));
if(layer_mask_info.disabled == psd_false && (layer_mask_info.default_color != 255 || layer_mask_info.mask_data != NULL))
{
layer_mask_info.left -= layer->left - stroke->size;
layer_mask_info.top -= layer->top - stroke->size;
layer_mask_info.right -= layer->left - stroke->size;
layer_mask_info.bottom -= layer->top - stroke->size;
psd_bitmap_blend_mask(&src_bmp, &layer_mask_info);
}
psd_bitmap_reverse_mixed_alpha_channel(&src_bmp);
psd_bitmap_blend_alpha_channel(&dst_bmp, &src_bmp);
switch(stroke->fill_type)
{
case psd_fill_solid_color:
psd_fill_bitmap_without_alpha_channel(&dst_bmp, stroke->fill_color);
break;
case psd_fill_gradient:
if(stroke->gradient_align == psd_false)
{
center_x = context->width / 2 + stroke->gradient_horz_offset * context->width / 100;
center_y = context->height / 2 + stroke->gradient_vert_offset * context->height / 100;
center_x -= layer->left;
center_y -= layer->top;
corner_angle = (psd_int)(atan((psd_float)context->height / context->width) * 180 / PSD_PI + 0.5);
angle = stroke->gradient_angle;
width = (context->width * stroke->gradient_scale + 100) / 200;
height = (context->height * stroke->gradient_scale + 100) / 200;
}
else
{
center_x = width / 2 + stroke->gradient_horz_offset * layer->width / 100;
center_y = height / 2 + stroke->gradient_vert_offset * layer->height / 100;
switch(stroke->position)
{
case psd_stroke_outside:
width = layer->width + stroke->size * 2;
height = layer->height + stroke->size * 2;
break;
case psd_stroke_inside:
width = layer->width;
height = layer->height;
break;
case psd_stroke_center:
width = layer->width + stroke->size;
height = layer->height + stroke->size;
break;
}
center_x += stroke->gradient_horz_offset * width / 100;
center_y += stroke->gradient_vert_offset * height / 100;
corner_angle = (psd_int)(atan((psd_float)height / width) * 180 / PSD_PI + 0.5);
angle = stroke->gradient_angle;
width = (width * stroke->gradient_scale + 100) / 200;
height = (height * stroke->gradient_scale + 100) / 200;
}
if(angle < 0)
angle += 360;
if(angle >= 90 && angle < 180)
{
angle = 180 - angle;
sign_x = -1;
}
else if(angle >= 180 && angle < 270)
{
angle = angle - 180;
sign_x = -1;
sign_y = -1;
}
else if(angle >= 270 && angle <= 360)
{
angle = 360 - angle;
sign_y = -1;
}
if(angle <= corner_angle)
{
radius_x = width;
radius_y = (psd_int)(radius_x * PSD_TAN(angle) + 0.5);
}
else
{
radius_y = height;
radius_x = (psd_int)(radius_y / PSD_TAN(angle) + 0.5);
}
radius_corner = (psd_int)(psd_carm_sqrt((psd_float)(radius_x * radius_x + radius_y * radius_y)) + 0.5);
switch(stroke->gradient_style)
{
case psd_gradient_style_linear:
psd_gradient_fill_linear(&src_bmp, &stroke->gradient_color, stroke->gradient_reverse,
center_x - sign_x * radius_x, center_y + sign_y * radius_y,
center_x + sign_x * radius_x, center_y - sign_y * radius_y);
break;
case psd_gradient_style_radial:
psd_gradient_fill_radial(&src_bmp, &stroke->gradient_color, stroke->gradient_reverse,
center_x, center_y, radius_corner);
break;
case psd_gradient_style_angle:
psd_gradient_fill_angle(&src_bmp, &stroke->gradient_color, stroke->gradient_reverse,
center_x, center_y, stroke->gradient_angle);
break;
case psd_gradient_style_reflected:
psd_gradient_fill_reflected(&src_bmp, &stroke->gradient_color, stroke->gradient_reverse,
center_x - sign_x * radius_x, center_y + sign_y * radius_y,
center_x + sign_x * radius_x, center_y - sign_y * radius_y);
break;
case psd_gradient_style_diamond:
psd_gradient_fill_diamond(&src_bmp, &stroke->gradient_color, stroke->gradient_reverse,
center_x, center_y, radius_corner, stroke->gradient_angle);
break;
default:
psd_assert(0);
break;
}
psd_bitmap_copy_without_alpha_channel(&dst_bmp, &src_bmp);
break;
case psd_fill_pattern:
for(i = 0; i < context->pattern_count; i ++)
{
if(strcmp(context->patterns[i].unique_id, stroke->pattern_info.identifier) == 0)
{
psd_pattern_fill(&src_bmp, &context->patterns[i], stroke->pattern_scale,
stroke->pattern_horz_phase + stroke->size,
stroke->pattern_vert_phase + stroke->size);
break;
}
}
psd_bitmap_copy_without_alpha_channel(&dst_bmp, &src_bmp);
break;
default:
psd_assert(0);
break;
}
psd_free_bitmap(&src_bmp);
data->valid[psd_layer_effects_type_stroke] = psd_false;
return psd_status_done;
}
