diff options
Diffstat (limited to 'progs/tests/texcompress2.c')
| -rw-r--r-- | progs/tests/texcompress2.c | 292 |
1 files changed, 0 insertions, 292 deletions
diff --git a/progs/tests/texcompress2.c b/progs/tests/texcompress2.c deleted file mode 100644 index b95aca9fb98..00000000000 --- a/progs/tests/texcompress2.c +++ /dev/null @@ -1,292 +0,0 @@ -/* - * Test texture compression. - */ - - -#include <assert.h> -#include <stdio.h> -#include <GL/glew.h> -#include <GL/glut.h> -#include "readtex.c" - -#define IMAGE_FILE "../images/arch.rgb" - -static int ImgWidth, ImgHeight; -static GLenum ImgFormat; -static GLenum CompFormat; -static GLfloat EyeDist = 5.0; -static GLfloat Rot = 0.0; -const GLenum Target = GL_TEXTURE_2D; - - -static void -CheckError(int line) -{ - GLenum err = glGetError(); - if (err) { - printf("GL Error %d at line %d\n", (int) err, line); - } -} - - -static const char * -LookupFormat(GLenum format) -{ - switch (format) { - case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: - return "GL_COMPRESSED_RGB_S3TC_DXT1_EXT"; - case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: - return "GL_COMPRESSED_RGBA_S3TC_DXT1_EXT"; - case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT: - return "GL_COMPRESSED_RGBA_S3TC_DXT3_EXT"; - default: - return "other"; - } -} - - -static void -TestSubTex(void) -{ - GLboolean all = 0*GL_TRUE; - GLubyte *buffer; - GLint size, fmt; - - glGetTexLevelParameteriv(Target, 0, - GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB, &size); - glGetTexLevelParameteriv(Target, 0, GL_TEXTURE_INTERNAL_FORMAT, &fmt); - - buffer = (GLubyte *) malloc(size); - glGetCompressedTexImageARB(Target, 0, buffer); - - printf("Testing sub-texture replacement\n"); - if (all) - glCompressedTexImage2DARB(Target, 0, - fmt, ImgWidth, ImgHeight, 0, - size, buffer); - else { - /* bottom half */ - glCompressedTexSubImage2DARB(Target, 0, - 0, 0, /* pos */ - ImgWidth, ImgHeight / 2, - fmt, size/2, buffer); - /* top half */ - glCompressedTexSubImage2DARB(Target, 0, - 0, ImgHeight / 2, /* pos */ - ImgWidth, ImgHeight / 2, - fmt, size/2, buffer + size / 2); - } - - free(buffer); -} - - -static void -TestGetTex(void) -{ - GLubyte *buffer; - - buffer = (GLubyte *) malloc(3 * ImgWidth * ImgHeight); - - glGetTexImage(GL_TEXTURE_2D, - 0, - GL_RGB, - GL_UNSIGNED_BYTE, - buffer); - - free(buffer); -} - - -static void -LoadCompressedImage(const char *file) -{ - const GLenum filter = GL_LINEAR; - GLubyte *image; - GLint p; - - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - glPixelStorei(GL_PACK_ALIGNMENT, 1); - - /* - * Load image and scale if needed. - */ - image = LoadRGBImage( file, &ImgWidth, &ImgHeight, &ImgFormat ); - if (!image) { - printf("Couldn't read %s\n", IMAGE_FILE); - exit(0); - } - printf("Image is %d x %d\n", ImgWidth, ImgHeight); - - /* power of two */ - assert(ImgWidth == 128 || ImgWidth == 256 || ImgWidth == 512); - assert(ImgWidth == 128 || ImgHeight == 256 || ImgHeight == 512); - - if (ImgFormat == GL_RGB) - CompFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; - else - CompFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT; - - if (ImgFormat == GL_RGBA) { - int i, numAlpha = 0; - for (i = 0; i < ImgWidth * ImgHeight; i++) { - if (image[i*4+3] != 0 && image[i*4+3] != 0xff) { - numAlpha++; - } - if (image[i*4+3] == 0) - image[i*4+3] = 4 * i / ImgWidth; - } - printf("Num Alpha !=0,255: %d\n", numAlpha); - } - - CompFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT; - - - /* - * Give image to OpenGL and have it compress it. - */ - glTexImage2D(Target, 0, CompFormat, ImgWidth, ImgHeight, 0, - ImgFormat, GL_UNSIGNED_BYTE, image); - CheckError(__LINE__); - - free(image); - - glGetTexLevelParameteriv(Target, 0, GL_TEXTURE_INTERNAL_FORMAT, &p); - printf("Compressed Internal Format: %s (0x%x)\n", LookupFormat(p), p); - assert(p == CompFormat); - - printf("Original size: %d bytes\n", ImgWidth * ImgHeight * 3); - glGetTexLevelParameteriv(Target, 0, GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB, &p); - printf("Compressed size: %d bytes\n", p); - - glTexParameteri(Target, GL_TEXTURE_MIN_FILTER, filter); - glTexParameteri(Target, GL_TEXTURE_MAG_FILTER, filter); - - if (0) - TestSubTex(); - else - TestGetTex(); - -} - - -static void -Init(const char *file) -{ - GLint numFormats, formats[100]; - GLint p; - - if (!glutExtensionSupported("GL_ARB_texture_compression")) { - printf("Sorry, GL_ARB_texture_compression is required.\n"); - exit(1); - } - if (!glutExtensionSupported("GL_EXT_texture_compression_s3tc")) { - printf("Sorry, GL_EXT_texture_compression_s3tc is required.\n"); - exit(1); - } - - printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); - printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); - - glGetIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB, &numFormats); - glGetIntegerv(GL_COMPRESSED_TEXTURE_FORMATS_ARB, formats); - printf("%d supported compression formats: ", numFormats); - for (p = 0; p < numFormats; p++) - printf("0x%x ", formats[p]); - printf("\n"); - - LoadCompressedImage(file); - - glEnable(GL_TEXTURE_2D); - - if (ImgFormat == GL_RGBA) { - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); - glEnable(GL_BLEND); - } -} - - -static void -Reshape( int width, int height ) -{ - glViewport( 0, 0, width, height ); - glMatrixMode( GL_PROJECTION ); - glLoadIdentity(); - glFrustum(-1, 1, -1, 1, 4, 100); - glMatrixMode( GL_MODELVIEW ); - glLoadIdentity(); -} - - -static void -Key( unsigned char key, int x, int y ) -{ - (void) x; - (void) y; - switch (key) { - case 'd': - EyeDist -= 1.0; - if (EyeDist < 4.0) - EyeDist = 4.0; - break; - case 'D': - EyeDist += 1.0; - break; - case 'z': - Rot += 5.0; - break; - case 'Z': - Rot -= 5.0; - break; - case 27: - exit(0); - break; - } - glutPostRedisplay(); -} - - -static void -Draw( void ) -{ - glClearColor(0.3, 0.3, .8, 0); - glClear(GL_COLOR_BUFFER_BIT); - - glPushMatrix(); - glTranslatef(0, 0, -(EyeDist+0.01)); - glRotatef(Rot, 0, 0, 1); - 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(); -} - - -int -main( int argc, char *argv[] ) -{ - glutInit( &argc, argv ); - glutInitWindowSize( 600, 600 ); - - glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE); - - glutCreateWindow(argv[0]); - glewInit(); - - glutReshapeFunc( Reshape ); - glutKeyboardFunc( Key ); - glutDisplayFunc( Draw ); - - if (argc > 1) - Init(argv[1]); - else - Init(IMAGE_FILE); - - glutMainLoop(); - return 0; -} |