diff options
| -rw-r--r-- | progs/tests/mipmap_limits.c | 138 |
1 files changed, 62 insertions, 76 deletions
diff --git a/progs/tests/mipmap_limits.c b/progs/tests/mipmap_limits.c index c089bb52c7b..6f6d893f77c 100644 --- a/progs/tests/mipmap_limits.c +++ b/progs/tests/mipmap_limits.c @@ -53,66 +53,56 @@ #include <stdio.h> #include <GL/glut.h> -GLubyte mipmapImage64[64][64][3]; -GLubyte mipmapImage32[32][32][3]; -GLubyte mipmapImage16[16][16][3]; -GLubyte mipmapImage8[8][8][3]; -GLubyte mipmapImage4[4][4][3]; -GLubyte mipmapImage2[2][2][3]; -GLubyte mipmapImage1[1][1][3]; - static GLint BaseLevel = 0, MaxLevel = 8; +static GLfloat LodBias = 0.0; static GLboolean NearestFilter = GL_TRUE; + +static void MakeImage(int level, int width, int height, const GLubyte color[4]) +{ + const int makeStripes = 0; + GLubyte img[256*256*3]; + int i, j; + for (i = 0; i < height; i++) { + for (j = 0; j < width; j++) { + int k = (i * width + j) * 3; + int p = (i/8) & makeStripes; + if (p == 0) { + img[k + 0] = color[0]; + img[k + 1] = color[1]; + img[k + 2] = color[2]; + } + else { + img[k + 0] = 0; + img[k + 1] = 0; + img[k + 2] = 0; + } + } + } + + glTexImage2D(GL_TEXTURE_2D, level, GL_RGB, width, height, 0, + GL_RGB, GL_UNSIGNED_BYTE, img); +} + + static void makeImages(void) { - int i, j; - - for (i = 0; i < 64; i++) { - for (j = 0; j < 64; j++) { - mipmapImage64[i][j][0] = 0; - mipmapImage64[i][j][1] = 255; - mipmapImage64[i][j][2] = 255; - } - } - for (i = 0; i < 32; i++) { - for (j = 0; j < 32; j++) { - mipmapImage32[i][j][0] = 255; - mipmapImage32[i][j][1] = 255; - mipmapImage32[i][j][2] = 0; - } - } - for (i = 0; i < 16; i++) { - for (j = 0; j < 16; j++) { - mipmapImage16[i][j][0] = 255; - mipmapImage16[i][j][1] = 0; - mipmapImage16[i][j][2] = 255; - } - } - for (i = 0; i < 8; i++) { - for (j = 0; j < 8; j++) { - mipmapImage8[i][j][0] = 255; - mipmapImage8[i][j][1] = 0; - mipmapImage8[i][j][2] = 0; - } - } - for (i = 0; i < 4; i++) { - for (j = 0; j < 4; j++) { - mipmapImage4[i][j][0] = 0; - mipmapImage4[i][j][1] = 255; - mipmapImage4[i][j][2] = 0; - } - } - for (i = 0; i < 2; i++) { - for (j = 0; j < 2; j++) { - mipmapImage2[i][j][0] = 0; - mipmapImage2[i][j][1] = 0; - mipmapImage2[i][j][2] = 255; - } - } - mipmapImage1[0][0][0] = 255; - mipmapImage1[0][0][1] = 255; - mipmapImage1[0][0][2] = 255; + static const GLubyte colors[8][3] = { + {128, 128, 128 }, + { 0, 255, 255 }, + { 255, 255, 0 }, + { 255, 0, 255 }, + { 255, 0, 0 }, + { 0, 255, 0 }, + { 0, 0, 255 }, + { 255, 255, 255 } + }; + int i, sz = 128; + + for (i = 0; i < 8; i++) { + MakeImage(i, sz, sz, colors[i]); + sz /= 2; + } } static void myinit(void) @@ -122,22 +112,9 @@ static void myinit(void) glShadeModel(GL_FLAT); glTranslatef(0.0, 0.0, -3.6); - makeImages(); + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - glTexImage2D(GL_TEXTURE_2D, 0, 3, 64, 64, 0, - GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage64[0][0][0]); - glTexImage2D(GL_TEXTURE_2D, 1, 3, 32, 32, 0, - GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage32[0][0][0]); - glTexImage2D(GL_TEXTURE_2D, 2, 3, 16, 16, 0, - GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage16[0][0][0]); - glTexImage2D(GL_TEXTURE_2D, 3, 3, 8, 8, 0, - GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage8[0][0][0]); - glTexImage2D(GL_TEXTURE_2D, 4, 3, 4, 4, 0, - GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage4[0][0][0]); - glTexImage2D(GL_TEXTURE_2D, 5, 3, 2, 2, 0, - GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage2[0][0][0]); - glTexImage2D(GL_TEXTURE_2D, 6, 3, 1, 1, 0, - GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage1[0][0][0]); + makeImages(); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); @@ -146,8 +123,9 @@ static void myinit(void) static void display(void) { - printf("GL_TEXTURE_BASE_LEVEL = %d GL_TEXTURE_MAX_LEVEL = %d filter = %s\n", - BaseLevel, MaxLevel, + GLfloat tcm = 4.0; + printf("GL_TEXTURE_BASE_LEVEL = %d GL_TEXTURE_MAX_LEVEL = %d Bias = %.2g filter = %s\n", + BaseLevel, MaxLevel, LodBias, NearestFilter ? "LINEAR" : "NEAREST"); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel); @@ -163,12 +141,14 @@ static void display(void) GL_LINEAR_MIPMAP_LINEAR); } + glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, LodBias); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glBegin(GL_QUADS); glTexCoord2f(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0); - glTexCoord2f(0.0, 8.0); glVertex3f(-2.0, 1.0, 0.0); - glTexCoord2f(8.0, 8.0); glVertex3f(3000.0, 1.0, -6000.0); - glTexCoord2f(8.0, 0.0); glVertex3f(3000.0, -1.0, -6000.0); + glTexCoord2f(0.0, tcm); glVertex3f(-2.0, 1.0, 0.0); + glTexCoord2f(tcm, tcm); glVertex3f(3000.0, 1.0, -6000.0); + glTexCoord2f(tcm, 0.0); glVertex3f(3000.0, -1.0, -6000.0); glEnd(); glFlush(); } @@ -209,6 +189,12 @@ key(unsigned char k, int x, int y) if (MaxLevel > 10) MaxLevel = 10; break; + case 'l': + LodBias -= 0.02; + break; + case 'L': + LodBias += 0.02; + break; case 'f': NearestFilter = !NearestFilter; break; @@ -235,7 +221,7 @@ int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); - glutInitWindowSize (500, 500); + glutInitWindowSize (600, 600); glutCreateWindow (argv[0]); myinit(); glutReshapeFunc (myReshape); |