RT. 没兴趣更新了~
适合：
1：想初步学习shader的同学可以了解下。
2：想用cocos2dx做点效果的同学可以了解下。
请直接下载当前页面附件的rar包就可以了。
如果需要直接运行程序的可以到百度盘下载：http://pan.baidu.com/s/1jGoRCmM
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//--------------------------------------------------------// 模糊效果static const GLchar* s_szBlurFSH = "
precision mediump float;
uniform sampler2D u_Texture;
uniform vec2 u_TextureCoordOffset[25];
varying vec2 v_texCoord;
varying vec4 v_fragmentColor;
void main(void)
{
vec4 sample[25];
for (int i = 0; i < 25; i++)
{
sample[i] = texture2D(u_Texture,
v_texCoord.st + u_TextureCoordOffset[i]);
}
//--------------------------------------------------------
// 1 3 1
// 3 1 3 / 11
// 1 3 1
//gl_FragColor = (sample[0] + (3.0*sample[1]) + sample[2] +
// (3.0*sample[3]) + sample[4] + (3.0*sample[5]) +
// sample[6] + (3.0*sample[7]) + sample[8]) / 11.0;
//--------------------------------------------------------
// Gaussian weighting:
// 1 4 7 4 1
// 4 16 26 16 4
// 7 26 41 26 7 / 273 (i.e. divide by total of weightings)
// 4 16 26 16 4
// 1 4 7 4 1
gl_FragColor = (
(1.0 * (sample[0] + sample[4] + sample[20] + sample[24])) +
(4.0 * (sample[1] + sample[3] + sample[5] + sample[9] +
sample[15] + sample[19] + sample[21] + sample[23])) +
(7.0 * (sample[2] + sample[10] + sample[14] + sample[22])) +
(16.0 * (sample[6] + sample[8] + sample[16] + sample[18])) +
(26.0 * (sample[7] + sample[11] + sample[13] + sample[17])) +
(41.0 * sample[12])
) / 273.0;
}";//--------------------------------------------------------// 磨砂static const GLchar* s_szSharpenFSH = "
precision mediump float;
uniform sampler2D u_Texture;
uniform vec2 u_TextureCoordOffset[25];
varying vec2 v_texCoord;
varying vec4 v_fragmentColor;
void main(void)
{
vec4 sample[25];
for (int i = 0; i < 25; i++)
{
sample[i] = texture2D(u_Texture,
v_texCoord.st + u_TextureCoordOffset[i]);
}
//--------------------------------------------------------
// -1 -1 -1
// -1 9 -1
// -1 -1 -1
//gl_FragColor = (sample[4] * 9.0) -
// (sample[0] + sample[1] + sample[2] +
// sample[3] + sample[5] +
// sample[6] + sample[7] + sample[8]);
//--------------------------------------------------------
// Sharpen weighting:
// 0 -1 -1 -1 0
// -1 2 -4 2 -1
// -1 -4 13 -4 -1
// -1 2 -4 2 -1
// 0 -1 -1 -1 0
//gl_FragColor = (
//(-1.0 * ( sample[1] + sample[2] + sample[3] + sample[5] +
//sample[9] + sample[10] + sample[14] + sample[15] +
//sample[19] + sample[21] + sample[22] + sample[23]) ) +
//(2.0 * (sample[6] + sample[8] + sample[16] + sample[18])) +
//(-4.0 *(sample[7] + sample[11] + sample[13] + sample[17]))+
//( 13.0 * sample[12] )
//);
// 1 1 1 1 1
// 1 1 1 1 1
// 1 1 -14 1 1
// 1 1 1 1 1
// 1 1 1 1 1
gl_FragColor = -14.0 * sample[12];
for (int i = 0; i < 25; i++)
{
if (i != 12)
gl_FragColor += sample[i];
}
gl_FragColor /= 14.0;
}";//-------------------------------------------------------- // 膨胀static const GLchar* s_szDilateFSH = "
precision mediump float;
uniform sampler2D u_Texture;
uniform vec2 u_TextureCoordOffset[25];
varying vec2 v_texCoord;
varying vec4 v_fragmentColor;
void main(void)
{
vec4 sample[25];
vec4 maxValue = vec4(0.0);
for (int i = 0; i < 25; i++)
{
// Sample a grid around and including our texel
sample[i] = texture2D(u_Texture, v_texCoord.st + u_TextureCoordOffset[i]);
// Keep the maximum value
maxValue = max(sample[i], maxValue);
}
gl_FragColor = maxValue;
}"; //-------------------------------------------------------- // 侵蚀效果static const GLchar* s_szErodeFSH = "
precision mediump float;
uniform sampler2D u_Texture;
uniform vec2 u_TextureCoordOffset[25];
varying vec2 v_texCoord;
varying vec4 v_fragmentColor;
void main(void)
{
vec4 sample[25];
vec4 minValue = vec4(1.0);
for (int i = 0; i < 25; i++)
{
// Sample a grid around and including our texel
sample[i] = texture2D(u_Texture, v_texCoord.st + u_TextureCoordOffset[i]);
// Keep the minimum value
minValue = min(sample[i], minValue);
}
gl_FragColor = minValue;
}"; //--------------------------------------------------------// Laplacian描边效果 static const GLchar* s_szLaplacianEdgeDetectionFSH = "
precision mediump float;
uniform sampler2D u_Texture;
uniform vec2 u_TextureCoordOffset[25];
varying vec2 v_texCoord;
varying vec4 v_fragmentColor;
void main(void)
{
vec4 sample[25];
for (int i = 0; i < 25; i++)
{
// Sample a grid around and including our texel
sample[i] = texture2D(u_Texture, v_texCoord.st + u_TextureCoordOffset[i]);
}
// Laplacian weighting:
// -1 -1 -1 -1 -1
// -1 -1 -1 -1 -1
// -1 -1 24 -1 -1
// -1 -1 -1 -1 -1
// -1 -1 -1 -1 -1
gl_FragColor = 24.0 * sample[12];
for (int i = 0; i < 25; i++)
{
if (i != 12)
gl_FragColor -= sample[i];
}
}";//--------------------------------------------------------// Sobel边缘检测static const GLchar* s_szSobelEdgeDetectionFSH = "
precision mediump float;
uniform sampler2D u_Texture;
uniform vec2 u_TextureCoordOffset[25];
varying vec2 v_texCoord;
varying vec4 v_fragmentColor;
void main(void)
{
vec4 sample[25];
for (int i = 0; i < 25; i++)
{
sample[i] = texture2D(u_Texture,
v_texCoord.st + u_TextureCoordOffset[i]);
}
// Sobel x:
// 1 2 0 -2 -1
// 4 8 0 -8 -4
// 6 12 0 -12-6 / 12
// 4 8 0 -8 -4
// 1 2 0 -2 -1
// Sobel y:
// -1 -4 -6 -4 -1
// -2 -8 -12-8 -2
// 0 0 0 0 0 / 12
// 2 8 12 8 2
// 1 4 6 4 1
vec4 vertEdge = sample[0] + 4.0 * sample[1] +
6.0 * sample[2] + 4.0 * sample[3] + sample[4] +
2.0 * sample[5] + 8.0 * sample[6] + 12.0 * sample[7] +
8.0 * sample[8] + 2.0 * sample[9] - 2.0 * sample[15] -
8.0 * sample[16] - 12.0 * sample[17] - 8.0 * sample[18] -
2.0 * sample[19] - sample[20] - 4.0 * sample[21] -
6.0 * sample[22] - 4.0 * sample[23] - sample[24];
vec4 horizEdge = - sample[0] - 2.0 * sample[1] +
2.0 * sample[3] + sample[4] - 4.0 * sample[5] -
8.0 * sample[6] + 8.0 * sample[8] + 4.0 * sample[9] -
6.0 * sample[10] - 12.0 * sample[11] + 12.0 * sample[13] +
6.0 * sample[14] - 4.0 * sample[15] - 8.0 * sample[16] +
8.0 * sample[18] + 4.0 * sample[19] - sample[20] -
2.0 * sample[21] + 2.0 * sample[23] + sample[24];
//gl_FragColor.rgb = sqrt(horizEdge.rgb) + sqrt(vertEdge.rgb);
gl_FragColor.rgb = sqrt((horizEdge.rgb * horizEdge.rgb) +
(vertEdge.rgb * vertEdge.rgb)) / 12.0f;
gl_FragColor.a = 1.0;
}";//-------------------------------------------------------- |
http://www.oschina.net/code/snippet_1159242_38156