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Some code for the multitexture combiners functionality (GLES 1.1 fixed pipeline)

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codeanticode
2010-11-23 16:47:48 +00:00
parent 128bc69b45
commit 2c646d3b0b
1 changed files with 97 additions and 13 deletions
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android/core/src/processing/core/PGraphicsAndroid3D.java
+97 -13
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@@ -1294,20 +1294,104 @@ public class PGraphicsAndroid3D extends PGraphics {
public void multitextureBlend(int mode) {
multitextureBlendMode = mode;
// http://www.opengl.org/wiki/Texture_Combiners
// http://techconficio.ca/Blog/files/OpenGL_ES_multiTex_example.html
// http://www.khronos.org/opengles/documentation/opengles1_0/html/glTexEnv.html
// http://www.opengl.org/wiki/GLSL_:_common_mistakes (mix function for blending)
/*
int t = GL11.GL_COMBINE_RGB;
t = GL11.GL_OPERAND0_RGB;
t = GL11.GL_SRC0_ALPHA;
t = GL11.GL_OPERAND1_ALPHA;
*/
}
protected void setMulitextureCombiners(int[] glids) {
// http://www.opengl.org/wiki/Texture_Combiners
// http://www.khronos.org/opengles/sdk/1.1/docs/man/glTexEnv.xml
// http://techconficio.ca/Blog/files/OpenGL_ES_multiTex_example.html
if (multitextureBlendMode == MULTIPLY) {
// multiply tex0 and tex1
// The keyword here is GL_MODULATE, which does the actual multiplication.
gl11.glActiveTexture(GL11.GL_TEXTURE0);
gl11.glBindTexture(GL11.GL_TEXTURE_2D, glids[0]);
//Simply sample the texture
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_TEXTURE_ENV_MODE, GL11.GL_DECAL);
//------------------------
gl11.glActiveTexture(GL11.GL_TEXTURE1);
gl11.glBindTexture(GL11.GL_TEXTURE_2D, glids[1]);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_TEXTURE_ENV_MODE, GL11.GL_COMBINE);
//Sample RGB, multiply by previous texunit result
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_COMBINE_RGB, GL11.GL_MODULATE); //Modulate RGB with RGB
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC0_RGB, GL11.GL_PREVIOUS);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC1_RGB, GL11.GL_TEXTURE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND0_RGB, GL11.GL_SRC_COLOR);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND1_RGB, GL11.GL_SRC_COLOR);
//Sample ALPHA, multiply by previous texunit result
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_COMBINE_ALPHA, GL11.GL_MODULATE); //Modulate ALPHA with ALPHA
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC0_ALPHA, GL11.GL_PREVIOUS);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC1_ALPHA, GL11.GL_TEXTURE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND0_ALPHA, GL11.GL_SRC_ALPHA);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND1_ALPHA, GL11.GL_SRC_ALPHA);
} else if (multitextureBlendMode == BLEND) {
// Blend tex1 and tex2 based on alpha of tex0
// The keyword here is GL_INTERPOLATE.
gl11.glActiveTexture(GL11.GL_TEXTURE0);
gl11.glBindTexture(GL11.GL_TEXTURE_2D, glids[0]);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_TEXTURE_ENV_MODE, GL11.GL_DECAL);
//------------------------
gl11.glActiveTexture(GL11.GL_TEXTURE1);
gl11.glBindTexture(GL11.GL_TEXTURE_2D, glids[1]);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_TEXTURE_ENV_MODE, GL11.GL_COMBINE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_COMBINE_RGB, GL11.GL_DECAL); //Get RGB of this texture (tex1)
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC0_RGB, GL11.GL_TEXTURE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND0_RGB, GL11.GL_SRC_COLOR);
//------------------------
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_COMBINE_ALPHA, GL11.GL_DECAL); //Get ALPHA of previous TUI (tex0)
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC0_ALPHA, GL11.GL_PREVIOUS);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND0_ALPHA, GL11.GL_SRC_ALPHA);
gl11.glActiveTexture(GL11.GL_TEXTURE2);
gl11.glBindTexture(GL11.GL_TEXTURE_2D, glids[2]);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_TEXTURE_ENV_MODE, GL11.GL_COMBINE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_COMBINE_RGB, GL11.GL_INTERPOLATE); //Interpolate RGB with RGB
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC0_RGB, GL11.GL_PREVIOUS);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC1_RGB, GL11.GL_TEXTURE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC2_RGB, GL11.GL_PREVIOUS);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND0_RGB, GL11.GL_SRC_COLOR);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND1_RGB, GL11.GL_SRC_COLOR);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND2_RGB, GL11.GL_SRC_ALPHA);
//------------------------
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_COMBINE_ALPHA, GL11.GL_INTERPOLATE); //Interpolate ALPHA with ALPHA
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC0_ALPHA, GL11.GL_PREVIOUS);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC1_ALPHA, GL11.GL_TEXTURE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC2_ALPHA, GL11.GL_PREVIOUS);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND0_ALPHA, GL11.GL_SRC_ALPHA);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND1_ALPHA, GL11.GL_SRC_ALPHA);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND2_ALPHA, GL11.GL_SRC_ALPHA);
} else if (multitextureBlendMode == ADD) {
// Add tex0 and tex1
// The keyword here is GL_ADD.
gl11.glActiveTexture(GL11.GL_TEXTURE0);
gl11.glBindTexture(GL11.GL_TEXTURE_2D, glids[0]);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_TEXTURE_ENV_MODE, GL11.GL_REPLACE);
//------------------------
gl11.glActiveTexture(GL11.GL_TEXTURE1);
gl11.glBindTexture(GL11.GL_TEXTURE_2D, glids[1]);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_TEXTURE_ENV_MODE, GL11.GL_COMBINE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_COMBINE_RGB, GL11.GL_ADD); //Add RGB with RGB
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC0_RGB, GL11.GL_PREVIOUS);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC1_RGB, GL11.GL_TEXTURE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND0_RGB, GL11.GL_SRC_COLOR);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND1_RGB, GL11.GL_SRC_COLOR);
// We have up to:
// GL11.GL_SRC2_RGB
// GL11.GL_OPERAND2_RGB
// ...
//
//------------------------
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_COMBINE_ALPHA, GL11.GL_ADD); //Add ALPHA with ALPHA
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC0_ALPHA, GL11.GL_PREVIOUS);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_SRC1_ALPHA, GL11.GL_TEXTURE);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND0_ALPHA, GL11.GL_SRC_ALPHA);
gl11.glTexEnvi(GL11.GL_TEXTURE_ENV, GL11.GL_OPERAND1_ALPHA, GL11.GL_SRC_ALPHA);
}
}
public void vertex(float x, float y) {
super.vertex(x, y);