diff options
author | Brian Paul <[email protected]> | 2009-02-10 16:44:02 -0700 |
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committer | Brian Paul <[email protected]> | 2009-02-10 16:44:02 -0700 |
commit | 5340b6dff73a0a23531ce2a5f28fba8303adab6e (patch) | |
tree | b141fc3648568dd8b941c966059e6ed32a8bd0ad /progs/demos/textures.c | |
parent | 9fd26daec24f21dbe17afcb2e2ab272667ee9a69 (diff) | |
parent | ee4c921b65fb76998711f3c40330505cbc49a0e0 (diff) |
Merge commit 'origin/gallium-master-merge'
This is the big merge of the gallium-0.2 branch into master.
gallium-master-merge was just the staging area for it.
Both gallium-0.2 and gallium-master-merge are considered closed now.
Conflicts:
progs/demos/Makefile
src/mesa/main/state.c
src/mesa/main/texenvprogram.c
Diffstat (limited to 'progs/demos/textures.c')
-rw-r--r-- | progs/demos/textures.c | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/progs/demos/textures.c b/progs/demos/textures.c new file mode 100644 index 00000000000..b7bf135d219 --- /dev/null +++ b/progs/demos/textures.c @@ -0,0 +1,374 @@ +/* + * Simple test of multiple textures + */ + + +#include <stdio.h> +#include <stdlib.h> +#include <math.h> +#include <GL/glut.h> +#include "readtex.h" + +#define TEST_CLAMP 0 +#define TEST_MIPMAPS 0 + +#define MAX_TEXTURES 8 + + +static int Win; +static GLfloat Xrot = 0, Yrot = 0, Zrot = 0; +static GLboolean Anim = GL_TRUE; +static GLboolean Blend = GL_FALSE; +static GLuint Filter = 0; +static GLboolean Clamp = GL_FALSE; + +static GLuint NumTextures; +static GLuint Textures[MAX_TEXTURES]; +static float TexRot[MAX_TEXTURES][3]; +static float TexPos[MAX_TEXTURES][3]; +static float TexAspect[MAX_TEXTURES]; + +static const char *DefaultFiles[] = { + "../images/arch.rgb", + "../images/reflect.rgb", + "../images/tree2.rgba", + "../images/tile.rgb" +}; + + +#define NUM_FILTERS 5 +static +struct filter { + GLenum min, mag; + const char *name; +} FilterModes[NUM_FILTERS] = { + { GL_NEAREST, GL_NEAREST, "Nearest,Nearest" }, + { GL_LINEAR, GL_LINEAR, "Linear,Linear" }, + { GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST, "NearestMipmapNearest,Nearest" }, + { GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR, "LinearMipmapNearest,Linear" }, + { GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR, "LinearMipmapLinear,Linear" } +}; + + + + +static void +Idle(void) +{ + Xrot = glutGet(GLUT_ELAPSED_TIME) * 0.02; + Yrot = glutGet(GLUT_ELAPSED_TIME) * 0.04; + //Zrot += 2.0; + glutPostRedisplay(); +} + + +static void +DrawTextures(void) +{ + GLuint i; + + for (i = 0; i < NumTextures; i++) { + GLfloat ar = TexAspect[i]; + + glPushMatrix(); + glTranslatef(TexPos[i][0], TexPos[i][1], TexPos[i][2]); + glRotatef(TexRot[i][0], 1, 0, 0); + glRotatef(TexRot[i][1], 0, 1, 0); + glRotatef(TexRot[i][2], 0, 0, 1); + + glBindTexture(GL_TEXTURE_2D, Textures[i]); + glBegin(GL_POLYGON); +#if TEST_CLAMP + glTexCoord2f( -0.5, -0.5 ); glVertex2f( -ar, -1.0 ); + glTexCoord2f( 1.5, -0.5 ); glVertex2f( ar, -1.0 ); + glTexCoord2f( 1.5, 1.5 ); glVertex2f( ar, 1.0 ); + glTexCoord2f( -0.5, 1.5 ); glVertex2f( -ar, 1.0 ); +#else + glTexCoord2f( 0.0, 0.0 ); glVertex2f( -ar, -1.0 ); + glTexCoord2f( 1.0, 0.0 ); glVertex2f( ar, -1.0 ); + glTexCoord2f( 1.0, 1.0 ); glVertex2f( ar, 1.0 ); + glTexCoord2f( 0.0, 1.0 ); glVertex2f( -ar, 1.0 ); +#endif + glEnd(); + + glPopMatrix(); + } +} + +static void +Draw(void) +{ + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + if (Blend) { + glEnable(GL_BLEND); + glDisable(GL_DEPTH_TEST); + } + else { + glDisable(GL_BLEND); + glEnable(GL_DEPTH_TEST); + } + + glPushMatrix(); + glRotatef(Xrot, 1, 0, 0); + glRotatef(Yrot, 0, 1, 0); + glRotatef(Zrot, 0, 0, 1); + + DrawTextures(); + + glPopMatrix(); + + glutSwapBuffers(); +} + + +static void +Reshape(int width, int height) +{ + glViewport(0, 0, width, height); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 50.0); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glTranslatef(0.0, 0.0, -10.0); +} + + +static GLfloat +RandFloat(float min, float max) +{ + float x = (float) (rand() % 1000) * 0.001; + x = x * (max - min) + min; + return x; +} + + +static void +Randomize(void) +{ + GLfloat k = 1.0; + GLuint i; + + srand(glutGet(GLUT_ELAPSED_TIME)); + + for (i = 0; i < NumTextures; i++) { + TexRot[i][0] = RandFloat(0.0, 360); + TexRot[i][1] = RandFloat(0.0, 360); + TexRot[i][2] = RandFloat(0.0, 360); + TexPos[i][0] = RandFloat(-k, k); + TexPos[i][1] = RandFloat(-k, k); + TexPos[i][2] = RandFloat(-k, k); + } +} + + +static void +SetTexParams(void) +{ + GLuint i; + for (i = 0; i < NumTextures; i++) { + glBindTexture(GL_TEXTURE_2D, Textures[i]); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, + FilterModes[Filter].min); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, + FilterModes[Filter].mag); + + if (Clamp) { + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + } + else { + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); + } + } +} + + +static void +Key(unsigned char key, int x, int y) +{ + const GLfloat step = 3.0; + (void) x; + (void) y; + switch (key) { + case 'a': + case ' ': + Anim = !Anim; + if (Anim) + glutIdleFunc(Idle); + else + glutIdleFunc(NULL); + break; + case 'b': + Blend = !Blend; + break; + case 'f': + Filter = (Filter + 1) % NUM_FILTERS; + SetTexParams(); + break; + case 'r': + Randomize(); + break; +#if TEST_CLAMP + case 'c': + Clamp = !Clamp; + SetTexParams(); + break; +#endif + case 'z': + Zrot -= step; + break; + case 'Z': + Zrot += step; + break; + case 27: + glutDestroyWindow(Win); + exit(0); + break; + } + + printf("Blend=%s Filter=%s\n", + Blend ? "Y" : "n", + FilterModes[Filter].name); + + glutPostRedisplay(); +} + + +static void +SpecialKey(int key, int x, int y) +{ + const GLfloat step = 3.0; + (void) x; + (void) y; + switch (key) { + case GLUT_KEY_UP: + Xrot -= step; + break; + case GLUT_KEY_DOWN: + Xrot += step; + break; + case GLUT_KEY_LEFT: + Yrot -= step; + break; + case GLUT_KEY_RIGHT: + Yrot += step; + break; + } + glutPostRedisplay(); +} + + +static void +LoadTextures(GLuint n, const char *files[]) +{ + GLuint i; + + NumTextures = n < MAX_TEXTURES ? n : MAX_TEXTURES; + + glGenTextures(n, Textures); + + SetTexParams(); + + for (i = 0; i < n; i++) { + GLint w, h; + glBindTexture(GL_TEXTURE_2D, Textures[i]); +#if TEST_MIPMAPS + { + static const GLubyte color[9][4] = { + {255, 0, 0}, + {0, 255, 0}, + {0, 0, 255}, + {0, 255, 255}, + {255, 0, 255}, + {255, 255, 0}, + {255, 128, 255}, + {128, 128, 128}, + {64, 64, 64} + }; + + GLubyte image[256*256*4]; + int i, level; + w = h = 256; + for (level = 0; level <= 8; level++) { + for (i = 0; i < w * h; i++) { + image[i*4+0] = color[level][0]; + image[i*4+1] = color[level][1]; + image[i*4+2] = color[level][2]; + image[i*4+3] = color[level][3]; + } + printf("Load level %d: %d x %d\n", level, w>>level, h>>level); + glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, w>>level, h>>level, 0, + GL_RGBA, GL_UNSIGNED_BYTE, image); + } + } +#else + if (!LoadRGBMipmaps2(files[i], GL_TEXTURE_2D, GL_RGB, &w, &h)) { + printf("Error: couldn't load %s\n", files[i]); + exit(1); + } +#endif + TexAspect[i] = (float) w / (float) h; + printf("Loaded %s\n", files[i]); + } +} + + +static void +Init(int argc, const char *argv[]) +{ + if (argc == 1) + LoadTextures(4, DefaultFiles); + else + LoadTextures(argc - 1, argv + 1); + + Randomize(); + + glEnable(GL_TEXTURE_2D); + + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + glColor4f(1, 1, 1, 0.5); + +#if 0 + /* setup lighting, etc */ + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); +#endif +} + + +static void +Usage(void) +{ + printf("Usage:\n"); + printf(" textures [file.rgb] ...\n"); + printf("Keys:\n"); + printf(" a - toggle animation\n"); + printf(" b - toggle blending\n"); + printf(" f - change texture filter mode\n"); + printf(" r - randomize\n"); + printf(" ESC - exit\n"); +} + + +int +main(int argc, char *argv[]) +{ + glutInit(&argc, argv); + glutInitWindowPosition(0, 0); + glutInitWindowSize(700, 700); + glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); + Win = glutCreateWindow(argv[0]); + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutSpecialFunc(SpecialKey); + glutDisplayFunc(Draw); + if (Anim) + glutIdleFunc(Idle); + Init(argc, (const char **) argv); + Usage(); + glutMainLoop(); + return 0; +} |