test handling of lots of textures

1 files changed, 326 insertions, 0 deletions

diff --git a/progs/tests/manytex.c b/progs/tests/manytex.c
new file mode 100644
index 0000000000..be776249e1
--- /dev/null
+++ b/progs/tests/manytex.c
@@ -0,0 +1,326 @@
+/* $Id: manytex.c,v 1.1 2000/08/02 17:57:56 brianp Exp $ */
+
+/*
+ * test handling of many texture maps
+ * Also tests texture priority and residency.
+ *
+ * Brian Paul
+ * August 2, 2000
+ */
+
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+
+static GLint NumTextures = 20;
+static GLuint *TextureID = NULL;
+static GLboolean *TextureResidency = NULL;
+static GLint TexWidth = 128, TexHeight = 128;
+static GLfloat Zrot = 0;
+static GLboolean Anim = GL_TRUE;
+static GLint WinWidth = 500, WinHeight = 400;
+static GLboolean MipMap = GL_FALSE;
+static GLboolean LinearFilter = GL_FALSE;
+static GLboolean RandomSize = GL_FALSE;
+static GLint Rows, Columns;
+static GLuint LowPriorityCount = 0;
+
+
+
+static void Idle( void )
+{
+   Zrot += 1.0;
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   GLfloat spacing = WinWidth / Columns;
+   GLfloat size = spacing * 0.4;
+   GLint i;
+
+   /* test residency */
+   {
+      GLboolean b;
+      GLint i, resident;
+      b = glAreTexturesResident(NumTextures, TextureID, TextureResidency);
+      if (b) {
+         printf("all resident\n");
+      }
+      else {
+         resident = 0;
+         for (i = 0; i < NumTextures; i++) {
+            if (TextureResidency[i]) {
+               resident++;
+            }
+         }
+         printf("%d of %d texture resident\n", resident, NumTextures);
+      }
+   }
+
+   /* render the textured quads */
+   glClear( GL_COLOR_BUFFER_BIT );
+   for (i = 0; i < NumTextures; i++) {
+      GLint row = i / Columns;
+      GLint col = i % Columns;
+      GLfloat x = col * spacing + spacing * 0.5;
+      GLfloat y = row * spacing + spacing * 0.5;
+
+      glPushMatrix();
+         glTranslatef(x, y, 0.0);
+         glRotatef(Zrot, 0, 0, 1);
+         glScalef(size, size, 1);
+
+         glBindTexture(GL_TEXTURE_2D, TextureID[i]);
+         glBegin(GL_POLYGON);
+         glTexCoord2f(0, 0);  glVertex2f(-1, -1);
+         glTexCoord2f(1, 0);  glVertex2f( 1, -1);
+         glTexCoord2f(1, 1);  glVertex2f( 1,  1);
+         glTexCoord2f(0, 1);  glVertex2f(-1,  1);
+         glEnd();
+      glPopMatrix();
+   }
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   WinWidth = width;
+   WinHeight = height;
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho(0, width, 0, height, -1, 1);
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+
+static void Init( void )
+{
+   GLint i;
+
+   if (RandomSize) {
+      printf("Creating %d %s random-size textures, ", NumTextures,
+             MipMap ? "Mipmapped" : "non-Mipmapped");
+   }
+   else {
+      printf("Creating %d %s %d x %d textures, ", NumTextures,
+             MipMap ? "Mipmapped" : "non-Mipmapped",
+             TexWidth, TexHeight);
+   }
+
+   if (LinearFilter) {
+      printf("bilinear filtering\n");
+   }
+   else {
+      printf("nearest filtering\n");
+   }
+
+
+   /* compute number of rows and columns of rects */
+   {
+      GLfloat area = (GLfloat) (WinWidth * WinHeight) / (GLfloat) NumTextures;
+      GLfloat edgeLen = sqrt(area);
+
+      Columns = WinWidth / edgeLen;
+      Rows = (NumTextures + Columns - 1) / Columns;
+      printf("Rows: %d  Cols: %d\n", Rows, Columns);
+   }
+
+
+   if (!TextureID) {
+      TextureID = (GLuint *) malloc(sizeof(GLuint) * NumTextures);
+      assert(TextureID);
+      glGenTextures(NumTextures, TextureID);
+   }
+
+   if (!TextureResidency) {
+      TextureResidency = (GLboolean *) malloc(sizeof(GLboolean) * NumTextures);
+      assert(TextureResidency);
+   }
+
+   for (i = 0; i < NumTextures; i++) {
+      GLubyte color[4];
+      GLubyte *texImage;
+      GLint j, row, col;
+
+      row = i / Columns;
+      col = i % Columns;
+
+      glBindTexture(GL_TEXTURE_2D, TextureID[i]);
+
+      if (i < LowPriorityCount)
+         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_PRIORITY, 0.5F);
+
+      if (RandomSize) {
+         int k = (glutGet(GLUT_ELAPSED_TIME) % 7) + 2;
+         TexWidth  = 1 << k;
+         TexHeight = 1 << k;
+      }
+
+      texImage = (GLubyte*) malloc(4 * TexWidth * TexHeight * sizeof(GLubyte));
+      assert(texImage);
+
+      /* determine texture color */
+      color[0] = (GLint) (255.0 * ((float) col / (Columns - 1)));
+      color[1] = 127;
+      color[2] = (GLint) (255.0 * ((float) row / (Rows - 1)));
+      color[3] = 255;
+
+      /* fill in solid-colored teximage */
+      for (j = 0; j < TexWidth * TexHeight; j++) {
+         texImage[j*4+0] = color[0];
+         texImage[j*4+1] = color[1];
+         texImage[j*4+2] = color[2];
+         texImage[j*4+3] = color[3];
+     }
+
+      if (MipMap) {
+         GLint level = 0;
+         GLint w = TexWidth, h = TexHeight;
+         while (1) {
+            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0,
+                         GL_RGBA, GL_UNSIGNED_BYTE, texImage);
+            if (w == 1 && h == 1)
+               break;
+            if (w > 1)
+               w /= 2;
+            if (h > 1)
+               h /= 2;
+            level++;
+            /*printf("%d: %d x %d\n", level, w, h);*/
+         }
+         if (LinearFilter) {
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+                            GL_LINEAR_MIPMAP_LINEAR);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+         }
+         else {
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+                            GL_NEAREST_MIPMAP_NEAREST);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+         }
+      }
+      else {
+         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TexWidth, TexHeight, 0,
+                      GL_RGBA, GL_UNSIGNED_BYTE, texImage);
+         if (LinearFilter) {
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+         }
+         else {
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+         }
+      }
+
+      free(texImage);
+   }
+
+   glEnable(GL_TEXTURE_2D);
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   const GLfloat step = 3.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 'a':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc(Idle);
+         else
+            glutIdleFunc(NULL);
+         break;
+      case 'z':
+         Zrot -= step;
+         break;
+      case 'Z':
+         Zrot += step;
+         break;
+      case ' ':
+         Init();
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+int main( int argc, char *argv[] )
+{
+   GLint i;
+
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( WinWidth, WinHeight );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+   if (Anim)
+      glutIdleFunc(Idle);
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "-n") == 0) {
+         NumTextures = atoi(argv[i+1]);
+         if (NumTextures <= 0) {
+            printf("Error, bad number of textures\n");
+            return 1;
+         }
+         i++;
+      }
+      else if (strcmp(argv[i], "-mipmap") == 0) {
+         MipMap = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-linear") == 0) {
+         LinearFilter = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-size") == 0) {
+         TexWidth = atoi(argv[i+1]);
+         TexHeight = atoi(argv[i+2]);
+         assert(TexWidth >= 1);
+         assert(TexHeight >= 1);
+         i += 2;
+      }
+      else if (strcmp(argv[i], "-randomsize") == 0) {
+         RandomSize = GL_TRUE;
+      }
+      else if (strcmp(argv[i], "-lowpri") == 0) {
+         LowPriorityCount = atoi(argv[i+1]);
+         i++;
+      }
+      else {
+         printf("Usage:\n");
+         printf("  manytex [options]\n");
+         printf("Options:\n");
+         printf("  -n <number of texture objects>\n");
+         printf("  -size <width> <height>  - specify texture size\n");
+         printf("  -randomsize  - use random size textures\n");
+         printf("  -mipmap      - generate mipmaps\n");
+         printf("  -linear      - use linear filtering instead of nearest\n");
+         printf("  -lowpri <n>  - Set lower priority on <n> textures\n");
+         return 0;
+      }
+   }
+
+   Init();
+
+   glutMainLoop();
+
+   return 0;
+}