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driver: Add Region and sourceRegion parameter at Draw

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This is a preparation to remove source-region information from
vertices.

Updates #1210
This commit is contained in:
Hajime Hoshi
2020-06-30 00:02:33 +09:00
parent dcba380827
commit 71c9e7ac40
15 changed files with 218 additions and 164 deletions
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26
internal/graphicsdriver/opengl/defaultshader.go
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@@ -114,12 +114,10 @@ attribute vec2 tex;
attribute vec4 tex_region;
attribute vec4 color_scale;
varying vec2 varying_tex;
varying vec4 varying_tex_region;
varying vec4 varying_color_scale;
void main(void) {
varying_tex = tex;
varying_tex_region = tex_region;
varying_color_scale = color_scale;
mat4 projection_matrix = mat4(
@@ -143,6 +141,7 @@ precision mediump float;
{{.Definitions}}
uniform sampler2D texture;
uniform vec4 source_region;
#if defined(USE_COLOR_MATRIX)
uniform mat4 color_matrix_body;
@@ -156,7 +155,6 @@ uniform highp float scale;
#endif
varying highp vec2 varying_tex;
varying highp vec4 varying_tex_region;
varying highp vec4 varying_color_scale;
highp float floorMod(highp float x, highp float y) {
@@ -190,11 +188,11 @@ void main(void) {
# if defined(ADDRESS_UNSAFE)
color = texture2D(texture, pos);
# else
pos = adjustTexelByAddress(pos, varying_tex_region);
if (varying_tex_region[0] <= pos.x &&
varying_tex_region[1] <= pos.y &&
pos.x < varying_tex_region[2] &&
pos.y < varying_tex_region[3]) {
pos = adjustTexelByAddress(pos, source_region);
if (source_region[0] <= pos.x &&
source_region[1] <= pos.y &&
pos.x < source_region[2] &&
pos.y < source_region[3]) {
color = texture2D(texture, pos);
} else {
color = vec4(0, 0, 0, 0);
@@ -212,8 +210,8 @@ void main(void) {
highp vec2 p1 = pos + (texel_size) / 2.0 + (texel_size / 512.0);
# if !defined(ADDRESS_UNSAFE)
p0 = adjustTexelByAddress(p0, varying_tex_region);
p1 = adjustTexelByAddress(p1, varying_tex_region);
p0 = adjustTexelByAddress(p0, source_region);
p1 = adjustTexelByAddress(p1, source_region);
# endif // defined(ADDRESS_UNSAFE)
vec4 c0 = texture2D(texture, p0);
@@ -221,19 +219,19 @@ void main(void) {
vec4 c2 = texture2D(texture, vec2(p0.x, p1.y));
vec4 c3 = texture2D(texture, p1);
# if !defined(ADDRESS_UNSAFE)
if (p0.x < varying_tex_region[0]) {
if (p0.x < source_region[0]) {
c0 = vec4(0, 0, 0, 0);
c2 = vec4(0, 0, 0, 0);
}
if (p0.y < varying_tex_region[1]) {
if (p0.y < source_region[1]) {
c0 = vec4(0, 0, 0, 0);
c1 = vec4(0, 0, 0, 0);
}
if (varying_tex_region[2] <= p1.x) {
if (source_region[2] <= p1.x) {
c1 = vec4(0, 0, 0, 0);
c3 = vec4(0, 0, 0, 0);
}
if (varying_tex_region[3] <= p1.y) {
if (source_region[3] <= p1.y) {
c2 = vec4(0, 0, 0, 0);
c3 = vec4(0, 0, 0, 0);
}