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[drape] in GLSL ES we can access to sampler array cell only by constant value. Is't sad

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ExMix 2014-03-28 11:48:31 +03:00 • committed by Alex Zolotarev
parent 3b6d445bdb
commit eadb163277
3 changed files with 26 additions and 23 deletions
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0
drape/shaders/doc/line_fragment_shader_fsh.txt Normal file
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37
drape/shaders/texturing_fragment_shader.fsh
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@ -1,5 +1,6 @@
uniform sampler2D u_textures[8];
varying highp vec4 v_texCoords;
varying highp vec2 v_texCoords;
varying highp float v_textureIndex;
const int Index0 = 0;
const int Index1 = 1;
@ -12,24 +13,24 @@ const int Index7 = 7;
void main(void)
{
int index = int(floor(v_texCoords.z));
highp vec4 color;
if (index == Index0)
color = texture2D(u_textures[Index0], v_texCoords.st);
else if (index == Index1)
color = texture2D(u_textures[Index1], v_texCoords.st);
else if (index == Index2)
color = texture2D(u_textures[Index2], v_texCoords.st);
else if (index == Index3)
color = texture2D(u_textures[Index3], v_texCoords.st);
else if (index == Index4)
color = texture2D(u_textures[Index4], v_texCoords.st);
else if (index == Index5)
color = texture2D(u_textures[Index5], v_texCoords.st);
else if (index == Index6)
color = texture2D(u_textures[Index6], v_texCoords.st);
else if (index == Index7)
color = texture2D(u_textures[Index7], v_texCoords.st);
int textureIndex = int(v_textureIndex);
if (textureIndex == Index0)
color = texture2D(u_textures[Index0], v_texCoords);
else if (textureIndex == Index1)
color = texture2D(u_textures[Index1], v_texCoords);
else if (textureIndex == Index2)
color = texture2D(u_textures[Index2], v_texCoords);
else if (textureIndex == Index3)
color = texture2D(u_textures[Index3], v_texCoords);
else if (textureIndex == Index4)
color = texture2D(u_textures[Index4], v_texCoords);
else if (textureIndex == Index5)
color = texture2D(u_textures[Index5], v_texCoords);
else if (textureIndex == Index6)
color = texture2D(u_textures[Index6], v_texCoords);
else if (textureIndex == Index7)
color = texture2D(u_textures[Index7], v_texCoords);
gl_FragColor = color;
}

12
drape/shaders/texturing_vertex_shader.vsh
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@ -1,14 +1,16 @@
attribute highp vec4 a_position;
attribute highp vec4 a_normal;
attribute highp vec4 a_texCoords;
attribute highp vec2 a_normal;
attribute highp vec3 a_texCoords;
uniform highp mat4 modelView;
uniform highp mat4 projection;
varying highp vec4 v_texCoords;
varying highp vec2 v_texCoords;
varying float v_textureIndex;
void main(void)
{
gl_Position = ((a_position * modelView) + a_normal) * projection;
v_texCoords = a_texCoords;
gl_Position = (vec4(a_normal.xy, 0, 0) + (a_position * modelView)) * projection;
v_texCoords = a_texCoords.st;
v_textureIndex = a_texCoords.z;
}