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examples/moire: Add a smaller scale, and remove AdjustTexel function from shaders

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This can reproduce the bug reported at #669.

Apparently, the fix (8827520d4a) is
no longer required after 3550abef7a.
That's pretty odd, but examples/moire proves this fact.

Updates #669
Updates #759
This commit is contained in:
Hajime Hoshi 2020-06-15 00:17:13 +09:00
parent 6d25f7eaeb
commit 1785b6a670
3 changed files with 3 additions and 33 deletions
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4
examples/moire/main.go
View File

@ -71,12 +71,14 @@ func (g *game) Update(screen *ebiten.Image) error {
if inpututil.IsKeyJustPressed(ebiten.KeyS) {
switch g.scale {
case 0.5:
g.scale = 1
case 1:
g.scale = 1.5
case 1.5:
g.scale = 2
case 2:
g.scale = 1
g.scale = 0.5
default:
panic("not reached")
}

15
internal/graphicsdriver/metal/graphics.go
View File

@ -93,19 +93,6 @@ vertex VertexOut VertexShader(
return out;
}
// AdjustTexels adjust texels.
// See #669, #759
float2 AdjustTexel(float2 source_size, float2 p0, float2 p1) {
const float2 texel_size = 1.0 / source_size;
if (fract((p1.x-p0.x)*source_size.x) == 0.0) {
p1.x -= texel_size.x / 512.0;
}
if (fract((p1.y-p0.y)*source_size.y) == 0.0) {
p1.y -= texel_size.y / 512.0;
}
return p1;
}
float FloorMod(float x, float y) {
if (x < 0.0) {
return y - (-x - y * floor(-x/y));
@ -154,7 +141,6 @@ struct ColorFromTexel<FILTER_LINEAR, address> {
float2 p0 = v.tex - texel_size / 2.0;
float2 p1 = v.tex + texel_size / 2.0;
p1 = AdjustTexel(source_size, p0, p1);
p0 = AdjustTexelByAddress<address>(p0, v.tex_region);
p1 = AdjustTexelByAddress<address>(p1, v.tex_region);
@ -193,7 +179,6 @@ struct ColorFromTexel<FILTER_SCREEN, address> {
float2 p0 = v.tex - texel_size / 2.0 / scale;
float2 p1 = v.tex + texel_size / 2.0 / scale;
p1 = AdjustTexel(source_size, p0, p1);
float4 c0 = texture.sample(texture_sampler, p0);
float4 c1 = texture.sample(texture_sampler, float2(p1.x, p0.y));

17
internal/graphicsdriver/opengl/defaultshader.go
View File

@ -156,20 +156,6 @@ varying highp vec2 varying_tex;
varying highp vec4 varying_tex_region;
varying highp vec4 varying_color_scale;
// adjustTexel adjusts the two texels and returns the adjusted second texel.
// When p1 - p0 is exactly equal to the texel size, jaggy can happen on macOS (#669).
// In order to avoid this jaggy, subtract a little bit from the second texel.
highp vec2 adjustTexel(highp vec2 p0, highp vec2 p1) {
highp vec2 texel_size = 1.0 / source_size;
if (fract((p1.x-p0.x)*source_size.x) == 0.0) {
p1.x -= texel_size.x / 512.0;
}
if (fract((p1.y-p0.y)*source_size.y) == 0.0) {
p1.y -= texel_size.y / 512.0;
}
return p1;
}
highp float floorMod(highp float x, highp float y) {
if (x < 0.0) {
return y - (-x - y * floor(-x/y));
@ -211,7 +197,6 @@ void main(void) {
highp vec2 p0 = pos - texel_size / 2.0;
highp vec2 p1 = pos + texel_size / 2.0;
p1 = adjustTexel(p0, p1);
p0 = adjustTexelByAddress(p0, varying_tex_region);
p1 = adjustTexelByAddress(p1, varying_tex_region);
@ -246,8 +231,6 @@ void main(void) {
highp vec2 p0 = pos - half_scaled_texel_size;
highp vec2 p1 = pos + half_scaled_texel_size;
p1 = adjustTexel(p0, p1);
vec4 c0 = texture2D(texture, p0);
vec4 c1 = texture2D(texture, vec2(p1.x, p0.y));
vec4 c2 = texture2D(texture, vec2(p0.x, p1.y));