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authorValentin Zagura <puthre@gmail.com>2019-10-07 13:19:27 +0100
committerValentin Zagura <puthre@gmail.com>2019-10-07 13:19:27 +0100
commit100d05cbecb8e00fb9b8063feb236f2e18d0cd7a (patch)
treef07cf831910efb431a8088c861f8ede49f88e3f4
parent6ee84f53a912f25afdaae256e70ffb2908ad1b7a (diff)
GLES3 Fixes for ninepatch margins when patch size is smaller than the patch texture resolution
Scaled ninepatch margins in screen space to be relative of the ninepatch size when the patch size is smaller than the patch texture resolution.
-rw-r--r--drivers/gles3/shaders/canvas.glsl26
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/gles3/shaders/canvas.glsl b/drivers/gles3/shaders/canvas.glsl
index 10c8764b8e..d0dab6a558 100644
--- a/drivers/gles3/shaders/canvas.glsl
+++ b/drivers/gles3/shaders/canvas.glsl
@@ -379,14 +379,16 @@ uniform bool np_draw_center;
// left top right bottom in pixel coordinates
uniform vec4 np_margins;
-float map_ninepatch_axis(float pixel, float draw_size, float tex_pixel_size, float margin_begin, float margin_end, int np_repeat, inout int draw_center) {
+float map_ninepatch_axis(float pixel, float draw_size, float tex_pixel_size, float margin_begin, float margin_end, float s_ratio, int np_repeat, inout int draw_center) {
float tex_size = 1.0 / tex_pixel_size;
- if (pixel < margin_begin) {
- return pixel * tex_pixel_size;
- } else if (pixel >= draw_size - margin_end) {
- return (tex_size - (draw_size - pixel)) * tex_pixel_size;
+ float screen_margin_begin = margin_begin / s_ratio;
+ float screen_margin_end = margin_end / s_ratio;
+ if (pixel < screen_margin_begin) {
+ return pixel * s_ratio * tex_pixel_size;
+ } else if (pixel >= draw_size - screen_margin_end) {
+ return (tex_size - (draw_size - pixel) * s_ratio) * tex_pixel_size;
} else {
if (!np_draw_center) {
draw_center--;
@@ -394,22 +396,22 @@ float map_ninepatch_axis(float pixel, float draw_size, float tex_pixel_size, flo
if (np_repeat == 0) { //stretch
//convert to ratio
- float ratio = (pixel - margin_begin) / (draw_size - margin_begin - margin_end);
+ float ratio = (pixel - screen_margin_begin) / (draw_size - screen_margin_begin - screen_margin_end);
//scale to source texture
return (margin_begin + ratio * (tex_size - margin_begin - margin_end)) * tex_pixel_size;
} else if (np_repeat == 1) { //tile
//convert to ratio
- float ofs = mod((pixel - margin_begin), tex_size - margin_begin - margin_end);
+ float ofs = mod((pixel - screen_margin_begin), tex_size - margin_begin - margin_end);
//scale to source texture
return (margin_begin + ofs) * tex_pixel_size;
} else if (np_repeat == 2) { //tile fit
//convert to ratio
- float src_area = draw_size - margin_begin - margin_end;
+ float src_area = draw_size - screen_margin_begin - screen_margin_end;
float dst_area = tex_size - margin_begin - margin_end;
float scale = max(1.0, floor(src_area / max(dst_area, 0.0000001) + 0.5));
//convert to ratio
- float ratio = (pixel - margin_begin) / src_area;
+ float ratio = (pixel - screen_margin_begin) / src_area;
ratio = mod(ratio * scale, 1.0);
return (margin_begin + ratio * dst_area) * tex_pixel_size;
}
@@ -431,9 +433,11 @@ void main() {
#ifdef USE_NINEPATCH
int draw_center = 2;
+ float s_ratio = max((1.0 / color_texpixel_size.x) / abs(dst_rect.z), (1.0 / color_texpixel_size.y) / abs(dst_rect.w));
+ s_ratio = max(1.0, s_ratio);
uv = vec2(
- map_ninepatch_axis(pixel_size_interp.x, abs(dst_rect.z), color_texpixel_size.x, np_margins.x, np_margins.z, np_repeat_h, draw_center),
- map_ninepatch_axis(pixel_size_interp.y, abs(dst_rect.w), color_texpixel_size.y, np_margins.y, np_margins.w, np_repeat_v, draw_center));
+ map_ninepatch_axis(pixel_size_interp.x, abs(dst_rect.z), color_texpixel_size.x, np_margins.x, np_margins.z, s_ratio, np_repeat_h, draw_center),
+ map_ninepatch_axis(pixel_size_interp.y, abs(dst_rect.w), color_texpixel_size.y, np_margins.y, np_margins.w, s_ratio, np_repeat_v, draw_center));
if (draw_center == 0) {
color.a = 0.0;