android - OpenGL ES 2.0 - GL_TEXTURE1 -


i'm trying use gl_texture1 texture unit draw simple shape. know how draw using standard gl_texture0, when changing not working.

i thought code, had change following:

glactivetexture(gl_texture1); gluniform1i(utexturelocation, 1);

what i'm missing?

code:

public class rendererclass implements renderer {  context context;  floatbuffer verticesinbuffer;  int apositionlocation; int atexturelocation; int utexturelocation;  int program;  public rendererclass(context context){     this.context = context; }  @override public void onsurfacecreated(gl10 arg0, eglconfig config) {      gles20.glclearcolor(1.0f, 0.0f, 0.0f, 0.0f);      float[] vertices = {          -0.5f, 0.5f, 0.5f, 0.5f,         -1.0f, 0.0f, 0.0f, 0.0f,          0.0f, 0.0f, 1.0f, 0.0f,          0.0f, 1.0f, 1.0f, 1.0f,         -1.0f, 1.0f, 0.0f, 1.0f,         -1.0f, 0.0f, 0.0f, 0.0f    };  verticesinbuffer = bytebuffer.allocatedirect(vertices.length*4).order(byteorder.nativeorder()).asfloatbuffer().put(vertices);  string vss = "attribute vec4 a_position;" +              "attribute vec2 a_texture;" +              "varying vec2 v_texture;" +              "void main(){" +              "    v_texture = a_texture;" +              "    gl_position = a_position;" +              "}";  string fss = "precision mediump float;" +              "varying vec2 v_texture;" +              "uniform sampler2d u_texture;" +              "void main(){" +              "    gl_fragcolor = texture2d(u_texture, v_texture);" +              "}";  int vs = glcreateshader(gl_vertex_shader); int fs = glcreateshader(gl_fragment_shader);  glshadersource(vs, vss); glshadersource(fs, fss);  glcompileshader(vs); glcompileshader(fs);  program = glcreateprogram();  glattachshader(program, vs); glattachshader(program, fs);  gllinkprogram(program);  apositionlocation = glgetattriblocation(program, "a_position");   // ***** texture stuff starts here   </</</</   // fase 1 glactivetexture(gl_texture0);  int[] gentextures = new int[1]; glgentextures(1, gentextures, 0);  glbindtexture(gl_texture_2d, gentextures[0]);  gltexparameteri(gl_texture_2d, gl_texture_min_filter, gl_linear_mipmap_linear); gltexparameteri(gl_texture_2d, gl_texture_mag_filter, gl_nearest);   // fase 2 bitmapfactory.options options = new bitmapfactory.options(); options.inscaled = false;  bitmap bitmap1 = bitmapfactory.decoderesource(context.getresources(), r.drawable.res_for_test_1, options);   // fase 3 teximage2d(gl_texture_2d, 0, bitmap1, 0); glgeneratemipmap(gl_texture_2d);       // fase 4 atexturelocation = glgetattriblocation(program, "a_texture"); utexturelocation = glgetuniformlocation(program, "u_texture");  gluniform1i(utexturelocation, 0);  verticesinbuffer.position(2); glenablevertexattribarray(atexturelocation); glvertexattribpointer(atexturelocation, 2, gl_float, false, 16, verticesinbuffer);   // ***** texture stuff ends here   </</</</   }  @override public void onsurfacechanged(gl10 arg0, int width, int height) {      gles20.glviewport(0, 0, width, height);  }  @override public void ondrawframe(gl10 glunused) {  gles20.glclear(gles20.gl_color_buffer_bit);  gluseprogram(program);  verticesinbuffer.position(0); glenablevertexattribarray(apositionlocation); glvertexattribpointer(apositionlocation, 2, gl_float, false, 16, verticesinbuffer);  gldrawarrays(gl_triangle_fan, 0, 6);  }  }

you need bind texture glbindtexture() after setting active texture unit glactivetexture():

gles20.glactivetexture(gles20.gl_texture0 + textureunit); gles20.glbindtexture(gles20.gl_texture_2d, textureid); gles20.gluniform1i(uniformid, textureunit);

i've answered in other question: https://stackoverflow.com/a/22906451/405681


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