android 用opengles實現幾個簡單的ps疊加方法和簡單的濾鏡再轉成bitmap

原創 红色与青色 2020-06-23 22:24

最近修改濾鏡，發現這篇文章終於把photoshop圖層疊加模式講清楚了 ，就想着實現這篇文章的效果，就做了個小demo

2019/09/04更新

增加了把各種濾鏡轉bitmap的方法

至於效果對不對我也不知道，因爲我沒裝ps就算裝了我也不會用

那篇文章的最後兩個沒有實現，收縮和補償值不知道是啥，也就跳過了

關於A和B，我理解爲A是背景圖片,B是疊加圖片，所以shader代碼內A是color1,B是color2，如果我的理解和文章剛好相反的話直接對調一下就可以了

接下來貼shader代碼，至於文件名，我實在不知道這麼多方法英文叫啥，而且我也懶得查就直接用拼音了

變暗  color_bian_an_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = min(color1,color2);
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

變亮  color_bian_liang_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = max(color1,color2);
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

正片疊底  color_zheng_pian_die_di_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = color1*color2;
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

濾色  color_lv_se_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = 1.0 - (1.0 - color1)*(1.0 - color2);
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

顏色加深  color_yan_se_jia_shen_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = color1 - (1.0 - color1)*(1.0 - color2)/color2;
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

顏色減淡  color_yan_se_jian_dan_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = color1 + color1*color2/(1.0 - color2);
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

線性加深  color_xian_xing_jia_shen_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = color1 + color2 - 1.0;
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

線性減淡  color_xian_xing_jian_dan_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = color1 + color2;
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

疊加  color_die_jia_fs.glsl

uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba;
        if(color1.r > 0.5)
            rgba.r = 1.0 - 2.0 * (1.0 - color1.r) * (1.0 - color2.r);
        else
            rgba.r = 2.0 * color1.r * color2.r;
        if(color1.g > 0.5)
            rgba.g = 1.0 - 2.0 * (1.0 - color1.g) * (1.0 - color2.g);
        else
            rgba.g = 2.0 * color1.g * color2.g;
        if(color1.b > 0.5)
            rgba.b = 1.0 - 2.0 * (1.0 - color1.b) * (1.0 - color2.b);
        else
            rgba.b = 2.0 * color1.b * color2.b;
        rgba.a = 1.0;
        gl_FragColor = rgba;
    }
}

強光  color_qiang_guang_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba;
        if(color2.r > 0.5)
            rgba.r = 1.0 - 2.0 * (1.0 - color1.r) * (1.0 - color2.r);
        else
            rgba.r = 2.0 * color1.r * color2.r;
        if(color2.g > 0.5)
            rgba.g = 1.0 - 2.0 * (1.0 - color1.g) * (1.0 - color2.g);
        else
            rgba.g = 2.0 * color1.g * color2.g;
        if(color2.b > 0.5)
            rgba.b = 1.0 - 2.0 * (1.0 - color1.b) * (1.0 - color2.b);
        else
            rgba.b = 2.0 * color1.b * color2.b;
        rgba.a = 1.0;
        gl_FragColor = rgba;
    }
}

柔光  color_rou_guang_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba;
        if(color2.r > 0.5)
            rgba.r = color1.r*(1.0 - color2.r)+sqrt(color1.r)*(2.0*color2.r - 1.0);
        else
            rgba.r = 2.0 * color1.r * color2.r + color1.r * color1.r *(1.0 - 2.0*color2.r);
        if(color2.g > 0.5)
            rgba.g = color1.g*(1.0 - color2.g)+sqrt(color1.g)*(2.0*color2.g - 1.0);
        else
            rgba.g = 2.0 * color1.g * color2.g + color1.g * color1.g *(1.0 - 2.0*color2.g);
        if(color2.b > 0.5)
            rgba.b = color1.b*(1.0 - color2.b)+sqrt(color1.b)*(2.0*color2.b - 1.0);
        else
            rgba.b = 2.0 * color1.b * color2.b + color1.b * color1.b *(1.0 - 2.0*color2.b);
        rgba.a = 1.0;
        gl_FragColor = rgba;
    }
}

亮光  color_liang_guang_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba;
        if(color2.r > 0.5)
            rgba.r = color1.r + color1.r*(2.0*color2.r - 1.0)/(2.0*(1.0 - color2.r));
        else
            rgba.r = color1.r - (1.0 - color1.r)*(1.0 - 2.0*color2.r)/(2.0*color2.r);
        if(color2.g > 0.5)
            rgba.g = color1.g + color1.g*(2.0*color2.g - 1.0)/(2.0*(1.0 - color2.g));
        else
            rgba.g = color1.g - (1.0 - color1.g)*(1.0 - 2.0*color2.g)/(2.0*color2.g);
        if(color2.b > 0.5)
            rgba.b = color1.b + color1.b*(2.0*color2.b - 1.0)/(2.0*(1.0 - color2.b));
        else
            rgba.b = color1.b - (1.0 - color1.b)*(1.0 - 2.0*color2.b)/(2.0*color2.b);
        rgba.a = 1.0;
        gl_FragColor = rgba;
    }
}

點光  color_dian_guang_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba;
        if(color2.r > 0.5)
            rgba.r = min(color1.r,2.0 * color2.r - 1.0);
        else
            rgba.r = min(color1.r,2.0 * color2.r);
        if(color2.g > 0.5)
            rgba.g = min(color1.g,2.0 * color2.g - 1.0);
        else
            rgba.g = min(color1.g,2.0 * color2.g);
        if(color2.b > 0.5)
            rgba.b = min(color1.b,2.0 * color2.b - 1.0);
        else
            rgba.b = min(color1.b,2.0 * color2.b);
        rgba.a = 1.0;
        gl_FragColor = rgba;
    }
}

線性光  color_xian_xing_guang_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = color1 + 2.0 * color2 - 1.0;
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

實色混合  color_shi_se_hun_he_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba;
        if(color1.r + color2.r >= 1.0)
            rgba.r = 1.0;
        else
            rgba.r = 0.0;
        if(color1.g + color2.g >= 1.0)
            rgba.g = 1.0;
        else
            rgba.g = 0.0;
        if(color1.b + color2.b >= 1.0)
            rgba.b = 1.0;
        else
            rgba.b = 0.0;
        rgba.a = 1.0;
        gl_FragColor = rgba;
    }
}

排除  color_pai_chu_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = color1 + color2 - 2.0 * color1 * color2;
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

差值  color_cha_zhi_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp vec4 color2 = texture2D(sTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    if(color2.a == 0.0){
        gl_FragColor = color1;
    }else if(color2.a != 1.0){
        gl_FragColor = mix(color1,color2,color2.a);
    }else{
        highp vec4 rgba = abs(color1 - color2);
        gl_FragColor = vec4(rgba.rgb,1.0);
    }
}

2019/8/30更新

又找到一篇文章圖像處理的濾鏡算法，也試着做了一下

在測試去色濾鏡的時候發現顯示效果和灰度濾鏡差不多，看代碼和他的圖片感覺不對，當rgb三個值是一樣的時候，這一像素就是灰色的，而示例圖片明顯發綠，然後我百度了一下發現去色就是指將彩色圖像通過運算轉化成灰度圖像，所以代碼應該是對的，可能圖片用錯了，當然這只是我的理解，僅供參考

裏頭的高斯模糊在我的這篇文章Android opengles 動態調節高斯模糊內實現了，我就沒加上

貼shader代碼，文件名當然還是拼音

灰度  color_hui_du_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp float grey = (color1.r+color1.g+color1.b)/3.0;
    gl_FragColor = vec4(grey,grey,grey,1.0);
}

黑白  color_hei_bai_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp float grey = (color1.r+color1.g+color1.b)/3.0;
    if(grey >= 100.0/255.0){
        grey = 1.0;
    }else{
        grey = 0.0;
    }
    gl_FragColor = vec4(grey,grey,grey,1.0);
}

反向  color_fan_xiang_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    gl_FragColor = vec4(1.0 - color1.r,1.0 - color1.g,1.0 - color1.b,1.0);
}

去色 color_qu_se_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp float min_color = min(min(color1.r,color1.g),color1.b);
    highp float max_color = max(max(color1.r,color1.g),color1.b);
    highp float floor_color =(min_color + max_color)*0.5;
    gl_FragColor = vec4(floor_color,floor_color,floor_color,1.0);
}

單色  color_dan_se_fs.glsl文章裏是紅色，我測試改成綠色了

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    gl_FragColor = vec4(0.0,color1.g,0.0,1.0);
}

懷舊  color_huai_jiu_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp float r = 0.393 * color1.r + 0.769 * color1.g + 0.189 * color1.b;
    highp float g = 0.349 * color1.r + 0.686 * color1.g + 0.168 * color1.b;
    highp float b = 0.272 * color1.r + 0.534 * color1.g + 0.131 * color1.b;
    r = r < 0.0 ? 0.0 : r > 1.0 ? 1.0 : r;
    g = g < 0.0 ? 0.0 : g > 1.0 ? 1.0 : g;
    b = b < 0.0 ? 0.0 : b > 1.0 ? 1.0 : b;
    gl_FragColor = vec4(r,g,b,1.0);
}

熔鑄  color_rong_zhu_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp float r = color1.r * 0.5 / (color1.g + color1.b);
    highp float g = color1.g * 0.5 / (color1.r + color1.b);
    highp float b = color1.b * 0.5 / (color1.r + color1.g);
    r = r < 0.0 ? 0.0 : r > 1.0 ? 1.0 : r;
    g = g < 0.0 ? 0.0 : g > 1.0 ? 1.0 : g;
    b = b < 0.0 ? 0.0 : b > 1.0 ? 1.0 : b;
    gl_FragColor = vec4(r,g,b,1.0);
}

冰凍  color_bing_dong_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp float r = (color1.r - color1.g - color1.b)*3.0*0.5;
    highp float g = (color1.g - color1.r - color1.b)*3.0*0.5;
    highp float b = (color1.b - color1.g - color1.r)*3.0*0.5;
    r = r < 0.0 ? 0.0 : r > 1.0 ? 1.0 : r;
    g = g < 0.0 ? 0.0 : g > 1.0 ? 1.0 : g;
    b = b < 0.0 ? 0.0 : b > 1.0 ? 1.0 : b;
    gl_FragColor = vec4(r,g,b,1.0);
}

連環畫  color_lian_huan_hua_fs.glsl

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp float r = abs(color1.g - color1.b + color1.g + color1.r) * color1.r;
    highp float g = abs(color1.b - color1.g + color1.b + color1.r) * color1.r;
    highp float b = abs(color1.b - color1.g + color1.b + color1.r) * color1.g;
    gl_FragColor = vec4(r,g,b,1.0);
}

褐色  color_he_se_fs.glsl代碼和懷舊一樣的

varying highp vec2 vTexCoord;
uniform highp sampler2D sTexture;
uniform highp sampler2D uTexture;
void main() {
    highp vec4 color1 = texture2D(uTexture, vec2(vTexCoord.x,1.0-vTexCoord.y));
    highp float r = 0.393 * color1.r + 0.769 * color1.g + 0.189 * color1.b;
    highp float g = 0.349 * color1.r + 0.686 * color1.g + 0.168 * color1.b;
    highp float b = 0.272 * color1.r + 0.534 * color1.g + 0.131 * color1.b;
    gl_FragColor = vec4(r,g,b,1.0);
}

 

Github

發表評論
所有評論
還沒有人評論，想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.
相關文章

Android使用MediaCodec和OpenGL對多段視頻畫面進行裁剪和拼接

太久沒寫博客了，由於工作，過年還有孩子出生搞得自己焦頭爛額，現在有些時間了就搞點東西。發現瀏覽量突破10萬了，也是挺高興的，雖然很多東西寫的不好，可也看到了自己的進步，也是前年到現在的累積。剛開始我只是學習視頻解碼，渲染和視頻編碼，慢慢的

红色与青色 2020-06-08 03:40:00

Android opengles 傳數組給shader着色器

最近在研究高斯模糊，有用到傳數組給着色器這個功能就記錄一下 先貼fragment_shader.glsl代碼 uniform highp float vt[4]; void main() { gl_FragColor = vec

红色与青色 2020-06-08 03:40:00

Android opengles 法線貼圖(Normal Mapping)

红色与青色 2020-05-20 16:06:17

OpenGL ES 2.0 - Matrix. setLookAtM/.frustumM/.multiplyMM

空白的泡 2020-05-12 23:21:00

android OpenGL開發使用JPCT-AE引擎顯示3D立方體

SakuraMashiro 2020-02-21 06:39:04

Android OpenGL 座標系理解

OpenGL 要求輸入的頂點座標都是標準化設備座標，即每個頂點的 x、y、z 都在 -1 到 1 之間，由標準化設備座標轉換爲屏幕座標的過程中會經歷變換多個座標系統，在這些特定的座標系中，一些操作和計算可以更加方便。 局部座標

hipeboy 2020-06-16 17:01:30

Android OpenGL10 多紋理效果

接着前面那一篇文章,上一篇沒有特別介紹API,這裏先介紹幾個常見的API,然後給出驗證程序: glGenTextures(GLsizei n, GLuint *textures) 參數一:用來生成文理數量; 參數二:儲存一個紋理索引,傳入

喝醉了的熊猫 2020-06-14 22:45:07

Android OpenGL10 輸入響應

OpenGL的承載體是GLSurfaceView,而GLSurfaceView類在很多方面類似於View,那麼它同樣具有與View的一些待遇,比如也能夠響應KeyEvent,MotionEvent事件等等,從前面幾篇中,有很多立方體的圖形

喝醉了的熊猫 2020-06-14 22:45:07

Android OpenGL10 紋理

前面一篇中簡述了基本圖形的繪製,並且給出着色,下面看看如何在一個立方體上面覆蓋一層紋理,就像在地板上貼了一層地板磚的效果. 同樣新建一個android studio工程,PumpKinBasicTexture工程: 主類如下: packa

喝醉了的熊猫 2020-06-14 22:45:07

Android OpenGL20 世界座標系,屏幕座標系,紋理座標系

在  http://blog.csdn.net/qq_31726827/article/details/51265186這一篇大概介紹了座標系,

喝醉了的熊猫 2020-06-14 22:45:07

Android OpenGL20 模型，視圖，投影與Viewport

對於很多初學者,視圖投影之類非常的難理解,然而這個東西非常非常的重要,如果不是非常清楚,根本無法定位3D Object(空間座標)和觀察角度(觀察角度不一樣,效果就不一樣),自己閱博無數,發現了一篇非常棒的blog文章: http://b

喝醉了的熊猫 2020-06-14 22:45:07

Android OpenGL 座標系

計算機中任何繪圖都離不開座標系只是在每種繪圖中座標系形式有些差異,比如平時做android的View,在自定義View中繪製直線,那麼這個時候默認的是採用的是屏幕座標系,即座標原點在屏幕左上角,X軸向右,Y向下: 而在opengl中採用

喝醉了的熊猫 2020-06-14 22:45:07

Android OpenGL 開始篇

我常給一些人的建議:如果條件不錯,就不要來做程序員了,因爲這不是人乾的事!程序員睡覺的時候也是清潔工人開始掃馬路的時候! 廢話不多說,自己也是作爲學習筆記而已,也是督促自己,因爲如果僅僅運行一個例子很簡單.自己研究這個當然也是需要應用到一

喝醉了的熊猫 2020-06-14 22:45:07

Android OpenGL10 基本圖形繪製

下面程序的opengl的圖形是根據Opengl1.0版本API進行的. <a> : 首先繪製點: <1> : 新建一個android studio工程,這個工程參考前一篇座標系的.工程名:PumpKinBasicGL10,主類如下: pa

喝醉了的熊猫 2020-06-14 22:44:56

Android使用MediaCodec和OpenGL對多段視頻畫面進行裁剪和拼接

太久沒寫博客了，由於工作，過年還有孩子出生搞得自己焦頭爛額，現在有些時間了就搞點東西。發現瀏覽量突破10萬了，也是挺高興的，雖然很多東西寫的不好，可也看到了自己的進步，也是前年到現在的累積。剛開始我只是學習視頻解碼，渲染和視頻編碼，慢慢的

红色与青色 2020-06-08 03:40:00