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progs/tests: Update mipmap_limits to show image and colors
This commit is contained in:
Jakob Bornecrantz
parent
d405ba3151
commit
a528eb51eb
2 changed files with 130 additions and 62 deletions
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@ -184,6 +184,11 @@ mipmap_view: mipmap_view.o readtex.o
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mipmap_view.o: mipmap_view.c readtex.h
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$(APP_CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) $< -o $@
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mipmap_limits: mipmap_limits.o readtex.o
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$(APP_CC) $(CFLAGS) mipmap_limits.o readtex.o $(LIBS) -o $@
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mipmap_limits.o: mipmap_limits.c readtex.h
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$(APP_CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) $< -o $@
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fillrate: fillrate.o readtex.o
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$(APP_CC) $(CFLAGS) fillrate.o readtex.o $(LIBS) -o $@
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@ -54,17 +54,22 @@
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#include <GL/glew.h>
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#include <GL/glut.h>
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static GLint BaseLevel = 0, MaxLevel = 8;
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#include "readtex.h"
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#define TEXTURE_FILE "../images/girl.rgb"
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static GLint BaseLevel = 0, MaxLevel = 9;
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static GLfloat MinLod = -1, MaxLod = 9;
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static GLfloat LodBias = 0.0;
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static GLboolean NearestFilter = GL_TRUE;
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static GLuint texImage, texColor, texCurrent;
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static void
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InitValues(void)
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{
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BaseLevel = 0;
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MaxLevel = 8;
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MaxLevel = 9;
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MinLod = -1;
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MaxLod = 9;
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LodBias = 0.0;
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@ -75,7 +80,7 @@ InitValues(void)
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static void MakeImage(int level, int width, int height, const GLubyte color[4])
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{
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const int makeStripes = 0;
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GLubyte img[256*256*3];
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GLubyte img[512*512*3];
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int i, j;
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for (i = 0; i < height; i++) {
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for (j = 0; j < width; j++) {
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@ -99,87 +104,138 @@ static void MakeImage(int level, int width, int height, const GLubyte color[4])
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}
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static void makeImages(void)
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static void makeImages(int image)
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{
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static const GLubyte colors[8][3] = {
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{128, 128, 128 },
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{ 0, 255, 255 },
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{ 255, 255, 0 },
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{ 255, 0, 255 },
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{ 255, 0, 0 },
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{ 0, 255, 0 },
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{ 0, 0, 255 },
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{ 255, 255, 255 }
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};
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int i, sz = 128;
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#define WIDTH 512
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#define HEIGHT 512
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if (glutExtensionSupported("GL_SGIS_generate_mipmap") && image) {
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/* test auto mipmap generation */
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GLint width, height, i;
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GLenum format;
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GLubyte *image = LoadRGBImage(TEXTURE_FILE, &width, &height, &format);
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if (!image) {
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printf("Error: could not load texture image %s\n", TEXTURE_FILE);
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exit(1);
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}
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/* resize */
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if (width != WIDTH || height != HEIGHT) {
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GLubyte *newImage = malloc(WIDTH * HEIGHT * 4);
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gluScaleImage(format, width, height, GL_UNSIGNED_BYTE, image,
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WIDTH, HEIGHT, GL_UNSIGNED_BYTE, newImage);
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free(image);
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image = newImage;
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}
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printf("Using GL_SGIS_generate_mipmap\n");
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glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
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glTexImage2D(GL_TEXTURE_2D, 0, format, WIDTH, HEIGHT, 0,
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format, GL_UNSIGNED_BYTE, image);
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glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_FALSE);
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free(image);
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for (i = 0; i < 8; i++) {
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MakeImage(i, sz, sz, colors[i]);
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sz /= 2;
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/* make sure mipmap was really generated correctly */
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width = WIDTH; height = HEIGHT;
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for (i = 0; i < 10; i++) {
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GLint w, h;
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glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_WIDTH, &w);
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glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_HEIGHT, &h);
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printf("Level %d size: %d x %d\n", i, w, h);
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width /= 2;
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height /= 2;
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}
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} else {
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static const GLubyte colors[10][3] = {
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{128, 128, 128 },
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{ 0, 255, 255 },
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{ 255, 255, 0 },
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{ 255, 0, 255 },
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{ 255, 0, 0 },
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{ 0, 255, 0 },
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{ 0, 0, 255 },
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{ 0, 255, 255 },
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{ 255, 255, 0 },
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{ 255, 255, 255 }
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};
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int i, sz = 512;
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for (i = 0; i < 10; i++) {
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MakeImage(i, sz, sz, colors[i]);
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printf("Level %d size: %d x %d\n", i, sz, sz);
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sz /= 2;
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}
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}
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}
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static void myinit(void)
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{
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InitValues();
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InitValues();
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glEnable(GL_DEPTH_TEST);
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glDepthFunc(GL_LESS);
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glShadeModel(GL_FLAT);
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glEnable(GL_DEPTH_TEST);
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glDepthFunc(GL_LESS);
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glShadeModel(GL_FLAT);
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glTranslatef(0.0, 0.0, -3.6);
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glTranslatef(0.0, 0.0, -3.6);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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makeImages();
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
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glEnable(GL_TEXTURE_2D);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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glGenTextures(1, &texImage);
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glBindTexture(GL_TEXTURE_2D, texImage);
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makeImages(1);
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glGenTextures(1, &texColor);
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glBindTexture(GL_TEXTURE_2D, texColor);
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makeImages(0);
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texCurrent = texImage;
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
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glEnable(GL_TEXTURE_2D);
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}
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static void display(void)
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{
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GLfloat tcm = 4.0;
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printf("BASE_LEVEL=%d MAX_LEVEL=%d MIN_LOD=%.2g MAX_LOD=%.2g Bias=%.2g Filter=%s\n",
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BaseLevel, MaxLevel, MinLod, MaxLod, LodBias,
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NearestFilter ? "NEAREST" : "LINEAR");
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
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GLfloat tcm = 1.0;
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glBindTexture(GL_TEXTURE_2D, texCurrent);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, MinLod);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, MaxLod);
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printf("BASE_LEVEL=%d MAX_LEVEL=%d MIN_LOD=%.2g MAX_LOD=%.2g Bias=%.2g Filter=%s\n",
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BaseLevel, MaxLevel, MinLod, MaxLod, LodBias,
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NearestFilter ? "NEAREST" : "LINEAR");
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
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if (NearestFilter) {
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
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GL_NEAREST_MIPMAP_NEAREST);
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}
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else {
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
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GL_LINEAR_MIPMAP_LINEAR);
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}
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, MinLod);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, MaxLod);
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glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, LodBias);
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if (NearestFilter) {
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
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GL_NEAREST_MIPMAP_NEAREST);
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}
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else {
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
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GL_LINEAR_MIPMAP_LINEAR);
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}
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0);
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glTexCoord2f(0.0, tcm); glVertex3f(-2.0, 1.0, 0.0);
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glTexCoord2f(tcm, tcm); glVertex3f(3000.0, 1.0, -6000.0);
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glTexCoord2f(tcm, 0.0); glVertex3f(3000.0, -1.0, -6000.0);
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glEnd();
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glFlush();
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glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, LodBias);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0);
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glTexCoord2f(0.0, tcm); glVertex3f(-2.0, 1.0, 0.0);
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glTexCoord2f(tcm * 3000.0, tcm); glVertex3f(3000.0, 1.0, -6000.0);
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glTexCoord2f(tcm * 3000.0, 0.0); glVertex3f(3000.0, -1.0, -6000.0);
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glEnd();
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glFlush();
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}
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static void myReshape(int w, int h)
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{
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glViewport(0, 0, w, h);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(60.0, 1.0*(GLfloat)w/(GLfloat)h, 1.0, 30000.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glViewport(0, 0, w, h);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(60.0, 1.0*(GLfloat)w/(GLfloat)h, 1.0, 30000.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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}
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static void
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@ -229,6 +285,12 @@ key(unsigned char k, int x, int y)
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case 'f':
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NearestFilter = !NearestFilter;
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break;
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case 't':
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if (texCurrent == texColor)
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texCurrent = texImage;
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else
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texCurrent = texColor;
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break;
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case ' ':
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InitValues();
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break;
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@ -251,6 +313,7 @@ static void usage(void)
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printf(" x/X decrease/increase GL_TEXTURE_MAX_LOD\n");
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printf(" l/L decrease/increase GL_TEXTURE_LOD_BIAS\n");
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printf(" f toggle nearest/linear filtering\n");
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printf(" t toggle texture color/image\n");
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printf(" SPACE reset values\n");
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}
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