color-blending

问题 I am using glBindFragDataLocationIndexed() and writing two colors in fragment shader. Following is my code : glBindFragDataLocationIndexed(shader_data.psId, 0, 0, "Frag_Out_Color0"); glBindFragDataLocationIndexed(shader_data.psId, 0, 1, "Frag_Out_Color1"); glActiveTexture ( GL_TEXTURE0 ); LoadTexture(texture1); glBindTexture ( GL_TEXTURE_2D, tex_id1); glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA,width, height, 0, GL_RGBA,GL_UNSIGNED_BYTE, texture1_data); glActiveTexture ( GL_TEXTURE1 );

问题 I am using glBindFragDataLocationIndexed() and writing two colors in fragment shader. Following is my code : glBindFragDataLocationIndexed(shader_data.psId, 0, 0, "Frag_Out_Color0"); glBindFragDataLocationIndexed(shader_data.psId, 0, 1, "Frag_Out_Color1"); glActiveTexture ( GL_TEXTURE0 ); LoadTexture(texture1); glBindTexture ( GL_TEXTURE_2D, tex_id1); glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA,width, height, 0, GL_RGBA,GL_UNSIGNED_BYTE, texture1_data); glActiveTexture ( GL_TEXTURE1 );

问题 I'm trying to blend two colors that are coded as integers. Here is my little function: int blend (int a, int b, float ratio) { if (ratio > 1f) { ratio = 1f; } else if (ratio < 0f) { ratio = 0f; } float iRatio = 1.0f - ratio; int aA = (a >> 24 & 0xff); int aR = ((a & 0xff0000) >> 16); int aG = ((a & 0xff00) >> 8); int aB = (a & 0xff); int bA = (b >> 24 & 0xff); int bR = ((b & 0xff0000) >> 16); int bG = ((b & 0xff00) >> 8); int bB = (b & 0xff); int A = ((int)(aA * iRatio) + (int)(bA * ratio));

问题 I'm trying to blend two colors that are coded as integers. Here is my little function: int blend (int a, int b, float ratio) { if (ratio > 1f) { ratio = 1f; } else if (ratio < 0f) { ratio = 0f; } float iRatio = 1.0f - ratio; int aA = (a >> 24 & 0xff); int aR = ((a & 0xff0000) >> 16); int aG = ((a & 0xff00) >> 8); int aB = (a & 0xff); int bA = (b >> 24 & 0xff); int bR = ((b & 0xff0000) >> 16); int bG = ((b & 0xff00) >> 8); int bB = (b & 0xff); int A = ((int)(aA * iRatio) + (int)(bA * ratio));

问题 I am taking two images in python and overlapping the first image onto the second image. What I would like to do is blend the images where they overlap. Is there a way to do this in python other than a for loop? 回答1: PIL has a blend function which combines two RGB images with a fixed alpha: out = image1 * (1.0 - alpha) + image2 * alpha However, to use blend , image1 and image2 must be the same size. So to prepare your images you'll need to paste each of them into a new image of the appropriate

问题 In my Windows Forms program, I have a PictureBox . The bitmap image inside it is small, 5 x 5 pixels. When assigned to a PictureBox , it becomes very blurry. I tried finding something like blending mode, blurring mode, or anti-aliasing mode, but I had no luck. This is what I want This is not what I want 回答1: The problem : A Bitmap, with a size that is much smaller than the container used to show it, is blurred and the otherwise sharp edges of the well-defined areas of color are

问题 In my Windows Forms program, I have a PictureBox . The bitmap image inside it is small, 5 x 5 pixels. When assigned to a PictureBox , it becomes very blurry. I tried finding something like blending mode, blurring mode, or anti-aliasing mode, but I had no luck. This is what I want This is not what I want 回答1: The problem : A Bitmap, with a size that is much smaller than the container used to show it, is blurred and the otherwise sharp edges of the well-defined areas of color are

问题 In my Windows Forms program, I have a PictureBox . The bitmap image inside it is small, 5 x 5 pixels. When assigned to a PictureBox , it becomes very blurry. I tried finding something like blending mode, blurring mode, or anti-aliasing mode, but I had no luck. This is what I want This is not what I want 回答1: The problem : A Bitmap, with a size that is much smaller than the container used to show it, is blurred and the otherwise sharp edges of the well-defined areas of color are

问题 I have two SKSpriteNode and their colors are defined like this: colorNode[0].color = UIColor(red: 255, green: 0, blue: 0, alpha: 1) colorNode[1].color = UIColor(red: 0, green: 255, blue: 0, alpha: 1) and I want to have a third SKSpriteNode colorized with a blend of the two first ones, the result should be like this : colorNode[2].color = UIColor(red: 255, green: 255, blue: 0, alpha: 1) but is there a way to addition two UIColors ? Like this : colorNode[2].color = colorNode[0].color +

问题 I saw this Java code that does a perfect 50% blend between two RGB888 colors extremely efficiently: public static int blendRGB(int a, int b) { return (a + b - ((a ^ b) & 0x00010101)) >> 1; } That's apparently equivalent to extracting and averaging the channels individually. Something like this: public static int blendRGB_(int a, int b) { int aR = a >> 16; int bR = b >> 16; int aG = (a >> 8) & 0xFF; int bG = (b >> 8) & 0xFF; int aB = a & 0xFF; int bB = b & 0xFF; int cR = (aR + bR) >> 1; int cG