英文:
Open GL problem with vertex shader on android emulator, typename expected
问题
我对着色器了解很少，而且这不是我的代码。它无法在我的模拟器上加载，并生成一个日志文件中的错误。为了更详细地说明问题，我正在使用DS游戏的Drastic模拟器，这只是一个用于该模拟器的滤镜或着色器，但似乎无法加载。
日志文件显示：
0:18: L0001: 期望类型名称，找到 '\'
因此，我正在寻找问题所在...
我尝试了很少，因为我了解得很少：
首先，我尝试稍微更改代码，日志之前显示找到 "if"，所以我将它移到下面看看是否会有所作为，结果是找到 "\ "，现在我不知道了，因为我很愚蠢...
代码保存在扩展名为 .dsd 的文件中，如下所示：
<vertex>
attribute vec2 a_vertex_coordinate;
attribute vec2 a_texture_coordinate;
uniform vec4 u_texture_size;
varying vec4 v_texture_coordinate;
varying vec4 v_texture_coordinate_1;
void main()
{
vec2 ps = vec2(1.0 / u_texture_size.z, 1.0 / u_texture_size.w);
float dx = ps.x;
float dy = ps.y;
gl_Position = vec4(a_vertex_coordinate.xy, 0.0, 1.0);
v_texture_coordinate = a_texture_coordinate.xyxy;
v_texture_coordinate_1.xy = vec2(0.0,-dy); // B
v_texture_coordinate_1.zw = vec2(-dx,0.0); // D
}
</vertex>
<fragment>
const vec3 dtt = vec3(65536.0, 255.0, 1.0);
float reduce(vec3 color) {
return dot(color, dtt);
}
uniform sampler2D u_texture;
uniform vec4 u_texture_size;
varying vec4 v_texture_coordinate;
varying vec4 v_texture_coordinate_1;
#define FILTRO(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, C1, I4, I5, N15, N14, N11, F, H)
\
if ( PE!=PH && ((PH==PF && ( (PE!=PI && (PE!=PB || PE!=PD || PB==C1 && PD==G0 || PF!=PB && PF!=PC || PH!=PD && PH!=PG)) \
|| (PE==PG && (PI==PH || PE==PD || PH!=PD)) \
|| (PE==PC && (PI==PH || PE==PB || PF!=PB)) ))\
|| (PE!=PF && (PE==PC && (PF!=PI && (PH==PI && PF!=PB || PE!=PI && PF==C4) || PE!=PI && PE==PG)))) ) \
{\
N11 = (N11+F)*0.5;\
N14 = (N14+H)*0.5;\
N15 = F;\
}\
else if (PE!=PH && PE!=PF && (PH!=PI && PE==PG && (PF==PI && PH!=PD || PE!=PI && PH==G5)))\
{\
N11 = (N11+H)*0.5;\
N14 = N11;\
N15 = H;\
}\
void main()
{
vec2 fp = fract(v_texture_coordinate.xy * u_texture_size.zw);
vec2 g1 = v_texture_coordinate_1.xy * (step(0.5,fp.x) + step(0.5, fp.y) - 1.0) + v_texture_coordinate_1.zw * (step(0.5,fp.x) - step(0.5, fp.y));
vec2 g2 = v_texture_coordinate_1.xy * (step(0.5,fp.y) - step(0.5, fp.x)) + v_texture_coordinate_1.zw * (step(0.5,fp.x) + step(0.5, fp.y) - 1.0);
vec3 A = texture2D(u_texture, v_texture_coordinate.xy + g1 + g2 ).xyz;
vec3 B = texture2D(u_texture, v_texture_coordinate.xy + g1 ).xyz;
vec3 C = texture2D(u_texture, v_texture_coordinate.xy + g1 - g2 ).xyz;
vec3 D = texture2D(u_texture, v_texture_coordinate.xy + g2 ).xyz;
vec3 E = texture2D(u_texture, v_texture_coordinate.xy ).xyz;
vec3 F = texture2D(u_texture, v_texture_coordinate.xy - g2 ).xyz;
vec3 G = texture2D(u_texture, v_texture_coordinate.xy - g1 + g2 ).xyz;
vec3 H = texture2D(u_texture, v_texture_coordinate.xy - g1 ).xyz;
vec3 I = texture2D(u_texture, v_texture_coordinate.xy - g1 - g2 ).xyz;
vec3 A1 = texture2D(u_texture, v_texture_coordinate.xy + 2.0 * g1 + g2 ).xyz;
vec3 C1 = texture2D(u_texture, v_texture_coordinate.xy + 2.0 * g1 - g2 ).xyz;
vec3 A0 = texture2D(u_texture, v_texture_coordinate.xy + g1 + 2.0 * g2 ).xyz;
vec3 G0 = texture2D(u_texture, v_texture_coordinate.xy - g1 + 2.0 * g2 ).xyz;
vec3 C4 = texture2D(u_texture, v_texture_coordinate.xy + g1 - 2.0 * g2 ).xyz;
vec3 I4 = texture2D(u_texture, v_texture_coordinate.xy - g1 - 2.0 * g2 ).xyz;
vec3 G5 = texture2D(u_texture, v_texture_coordinate.xy - 2.0 * g1 + g2 ).xyz;
vec3 I5 = texture2D(u_texture, v_texture_coordinate.xy - 2.0 * g1 - g2 ).xyz;
vec3 E11 = E;
vec3 E14 = E;
vec3 E15 = E;
float a = reduce(A);
float b = reduce(B);
float c = reduce(C);
float d = reduce(D);
float e = reduce(E);
float f = reduce(F);
float g = reduce(G);
float h = reduce(H);
float i = reduce(I);
float a1 = reduce
<details>
<summary>英文:</summary>
I have very little understanding about shaders and this one is not mine. It just can't be loaded on my emulator and it gives me an error in the form of a log file. To elaborate more on the problem: i'm using the Drastic emulator for DS games, this is only a filter o shader for such emulator but i doesn't seem to load.
The log file says:
0:18: L0001: Typename expected, found '\\'
So i'm asking to see where the problem is...
I tried very little, since i know very little:
First i tried changing a bit the code, before the log said it found "if" so i moved it down to see if it would do something and it resulted in founding "\\" and now i don't know anymore since i'm stupid...
The code is in a file with the extension .dsd and is the following:
<vertex>
attribute vec2 a_vertex_coordinate;
attribute vec2 a_texture_coordinate;
uniform vec4 u_texture_size;
varying vec4 v_texture_coordinate;
varying vec4 v_texture_coordinate_1;
void main()
{
vec2 ps = vec2(1.0 / u_texture_size.z, 1.0 / u_texture_size.w);
float dx = ps.x;
float dy = ps.y;
gl_Position = vec4(a_vertex_coordinate.xy, 0.0, 1.0);
v_texture_coordinate = a_texture_coordinate.xyxy;
v_texture_coordinate_1.xy = vec2(0.0,-dy); // B
v_texture_coordinate_1.zw = vec2(-dx,0.0); // D
}
</vertex>
<fragment>
const vec3 dtt = vec3(65536.0, 255.0, 1.0);
float reduce(vec3 color) {
return dot(color, dtt);
}
uniform sampler2D u_texture;
uniform vec4 u_texture_size;
varying vec4 v_texture_coordinate;
varying vec4 v_texture_coordinate_1;
#define FILTRO(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, C1, I4, I5, N15, N14, N11, F, H)
if ( PE!=PH && ((PH==PF && ( (PE!=PI && (PE!=PB || PE!=PD || PB==C1 && PD==G0 || PF!=PB && PF!=PC || PH!=PD && PH!=PG))
|| (PE==PG && (PI==PH || PE==PD || PH!=PD))
|| (PE==PC && (PI==PH || PE==PB || PF!=PB)) ))
|| (PE!=PF && (PE==PC && (PF!=PI && (PH==PI && PF!=PB || PE!=PI && PF==C4) || PE!=PI && PE==PG)))) )
{
N11 = (N11+F)*0.5;
N14 = (N14+H)*0.5;
N15 = F;
}
else if (PE!=PH && PE!=PF && (PH!=PI && PE==PG && (PF==PI && PH!=PD || PE!=PI && PH==G5)))
{
N11 = (N11+H)*0.5;
N14 = N11;
N15 = H;
}\
void main()
{
vec2 fp = fract(v_texture_coordinate.xy * u_texture_size.zw);
vec2 g1 = v_texture_coordinate_1.xy * (step(0.5,fp.x) + step(0.5, fp.y) - 1.0) + v_texture_coordinate_1.zw * (step(0.5,fp.x) - step(0.5, fp.y));
vec2 g2 = v_texture_coordinate_1.xy * (step(0.5,fp.y) - step(0.5, fp.x)) + v_texture_coordinate_1.zw * (step(0.5,fp.x) + step(0.5, fp.y) - 1.0);
vec3 A = texture2D(u_texture, v_texture_coordinate.xy + g1 + g2 ).xyz;
vec3 B = texture2D(u_texture, v_texture_coordinate.xy + g1 ).xyz;
vec3 C = texture2D(u_texture, v_texture_coordinate.xy + g1 - g2 ).xyz;
vec3 D = texture2D(u_texture, v_texture_coordinate.xy + g2 ).xyz;
vec3 E = texture2D(u_texture, v_texture_coordinate.xy ).xyz;
vec3 F = texture2D(u_texture, v_texture_coordinate.xy - g2 ).xyz;
vec3 G = texture2D(u_texture, v_texture_coordinate.xy - g1 + g2 ).xyz;
vec3 H = texture2D(u_texture, v_texture_coordinate.xy - g1 ).xyz;
vec3 I = texture2D(u_texture, v_texture_coordinate.xy - g1 - g2 ).xyz;
vec3 A1 = texture2D(u_texture, v_texture_coordinate.xy + 2.0 * g1 + g2 ).xyz;
vec3 C1 = texture2D(u_texture, v_texture_coordinate.xy + 2.0 * g1 - g2 ).xyz;
vec3 A0 = texture2D(u_texture, v_texture_coordinate.xy + g1 + 2.0 * g2 ).xyz;
vec3 G0 = texture2D(u_texture, v_texture_coordinate.xy - g1 + 2.0 * g2 ).xyz;
vec3 C4 = texture2D(u_texture, v_texture_coordinate.xy + g1 - 2.0 * g2 ).xyz;
vec3 I4 = texture2D(u_texture, v_texture_coordinate.xy - g1 - 2.0 * g2 ).xyz;
vec3 G5 = texture2D(u_texture, v_texture_coordinate.xy - 2.0 * g1 + g2 ).xyz;
vec3 I5 = texture2D(u_texture, v_texture_coordinate.xy - 2.0 * g1 - g2 ).xyz;
vec3 E11 = E;
vec3 E14 = E;
vec3 E15 = E;
float a = reduce(A);
float b = reduce(B);
float c = reduce(C);
float d = reduce(D);
float e = reduce(E);
float f = reduce(F);
float g = reduce(G);
float h = reduce(H);
float i = reduce(I);
float a1 = reduce( A1);
float c1 = reduce( C1);
float a0 = reduce( A0);
float g0 = reduce( G0);
float c4 = reduce( C4);
float i4 = reduce( I4);
float g5 = reduce( G5);
float i5 = reduce( I5);
FILTRO(e, i, h, f, g, c, d, b, a, g5, c4, g0, c1, i4, i5, E15, E14, E11, F, H);
gl_FragColor.rgb = (fp.x < 0.50) ? ((fp.x < 0.25) ? ((fp.y < 0.25) ? E15: (fp.y < 0.50) ? E11: (fp.y < 0.75) ? E14: E15) : ((fp.y < 0.25) ? E14: (fp.y < 0.50) ? E : (fp.y < 0.75) ? E : E11)) : ((fp.x < 0.75) ? ((fp.y < 0.25) ? E11: (fp.y < 0.50) ? E : (fp.y < 0.75) ? E : E14) : ((fp.y < 0.25) ? E15: (fp.y < 0.50) ? E14: (fp.y < 0.75) ? E11 : E15));
}
</fragment>
This code is used from the .dfx file if i'm not mistaken, so here's also the dfx:
<options>
name=4XBR v1.1 Low configuration
textures=1
</options>
<fheader>
#if GL_ES
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif
#endif
</fheader>
<texture:0>
input=framebuffer
min_filter=GL_NEAREST
mag_filter=GL_NEAREST
</texture>
<pass>
shader=4XBR_v1.1_Low configuration.dsd
sampler:u_texture=0
</pass>
This should be everything i have gone through, if anyone can help me it would be immensely appreciated, thanks!
</details>
# 答案1
**得分**: 0
根据所使用的命名，此着色器使用OpenGL ES 2.0着色器语言（`#version 100`）。在ESSL 1.0中不支持行继续，因此此着色器依赖供应商扩展或超出规范的行为。
在OpenGL ES 3.0着色器语言中（`#version 300 es`）添加了行继续支持，但如果启用它，您需要修复着色器的其余部分的输入和输出声明，以使用新的样式（使用`in`而不是`varying`，显式的`out`变量而不是`gl_FragCoord`），并需要ES 3.0上下文。
解决方法是将`FILTRO()`宏展开为单行，以避免行继续（在Mali离线编译器上进行本地测试，它可以成功编译）。
<details>
<summary>英文:</summary>
Based on the naming used this shader is using the OpenGL ES 2.0 shader language (`#version 100`). Line continuation isn't supported in ESSL 1.0, so this shader is relying on a vendor extension or out-of-spec behavior.
Line continuation support was added in OpenGL ES 3.0 shader language (#version 300 es), but if you enable that you need to fix the rest of the shader input and output declarations to use the new style (`in` rather than `varying`, explicit `out` variable rather than `gl_FragCoord`), and need an ES 3.0 context.
The workaround would be to flatten the `FILTRO()` macro to be a single line to avoid the line continuations (tested locally here on the Mali Offline Compiler and it compiles OK).
</details>
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