--- /dev/null
+/*
+ * Test the GL_NV_texture_rectangle and GL_MESA_ycrcb_texture extensions.
+ *
+ * Brian Paul 13 September 2002
+ */
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+#include "../util/readtex.c" /* I know, this is a hack. */
+
+#define TEXTURE_FILE "../images/girl.rgb"
+
+static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
+static GLint ImgWidth, ImgHeight;
+static GLenum ImgFormat;
+static GLubyte *Image = NULL;
+static GLushort *ImageYUV = NULL;
+
+
+static void DrawObject(void)
+{
+ glBegin(GL_QUADS);
+
+ glTexCoord2f(0, 0);
+ glVertex2f(-1.0, -1.0);
+
+ glTexCoord2f(ImgWidth, 0);
+ glVertex2f(1.0, -1.0);
+
+ glTexCoord2f(ImgWidth, ImgHeight);
+ glVertex2f(1.0, 1.0);
+
+ glTexCoord2f(0, ImgHeight);
+ glVertex2f(-1.0, 1.0);
+
+ glEnd();
+}
+
+
+static void Display( void )
+{
+ glClear( GL_COLOR_BUFFER_BIT );
+
+ glPushMatrix();
+ glRotatef(Xrot, 1.0, 0.0, 0.0);
+ glRotatef(Yrot, 0.0, 1.0, 0.0);
+ glRotatef(Zrot, 0.0, 0.0, 1.0);
+ DrawObject();
+ 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, 10.0, 100.0 );
+ glMatrixMode( GL_MODELVIEW );
+ glLoadIdentity();
+ glTranslatef( 0.0, 0.0, -15.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+ (void) x;
+ (void) y;
+ switch (key) {
+ case 27:
+ exit(0);
+ break;
+ }
+ glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+ float 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();
+}
+
+
+#define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
+
+static void ConvertRGBtoYUV(GLint w, GLint h, const GLubyte *src,
+ GLushort *dest)
+{
+ GLint i, j;
+
+ for (i = 0; i < h; i++) {
+ for (j = 0; j < w; j++) {
+ const GLfloat r = (*src++) / 255.0;
+ const GLfloat g = (*src++) / 255.0;
+ const GLfloat b = (*src++) / 255.0;
+ GLfloat y, cr, cb;
+ GLint iy, icr, icb;
+
+ y = r * 65.481 + g * 128.553 + b * 24.966 + 16;
+ cb = r * -37.797 + g * -74.203 + b * 112.0 + 128;
+ cr = r * 112.0 + g * -93.786 + b * -18.214 + 128;
+ /*printf("%f %f %f -> %f %f %f\n", r, g, b, y, cb, cr);*/
+ iy = (GLint) CLAMP(y, 0, 254);
+ icb = (GLint) CLAMP(cb, 0, 254);
+ icr = (GLint) CLAMP(cr, 0, 254);
+
+ if (j & 1) {
+ /* odd */
+ *dest = (iy << 8) | icr;
+ }
+ else {
+ /* even */
+ *dest = (iy << 8) | icb;
+ }
+ dest++;
+ }
+ }
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+ GLuint texObj = 100;
+ const char *file;
+
+ if (!glutExtensionSupported("GL_NV_texture_rectangle")) {
+ printf("Sorry, GL_NV_texture_rectangle is required\n");
+ exit(0);
+ }
+
+ if (!glutExtensionSupported("GL_MESA_ycbcr_texture")) {
+ printf("Sorry, GL_MESA_ycbcr_texture is required\n");
+ exit(0);
+ }
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+ glBindTexture(GL_TEXTURE_RECTANGLE_NV, texObj);
+#ifdef LINEAR_FILTER
+ /* linear filtering looks much nicer but is much slower for Mesa */
+ glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+#else
+ glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+#endif
+
+ if (argc > 1)
+ file = argv[1];
+ else
+ file = TEXTURE_FILE;
+
+ Image = LoadRGBImage(file, &ImgWidth, &ImgHeight, &ImgFormat);
+ if (!Image) {
+ printf("Couldn't read %s\n", TEXTURE_FILE);
+ exit(0);
+ }
+
+ printf("Image: %dx%d\n", ImgWidth, ImgHeight);
+
+ ImageYUV = (GLushort *) malloc(ImgWidth * ImgHeight * sizeof(GLushort));
+ ConvertRGBtoYUV(ImgWidth, ImgHeight, Image, ImageYUV);
+ glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0,
+ GL_YCBCR_MESA, ImgWidth, ImgHeight, 0,
+ GL_YCBCR_MESA, GL_UNSIGNED_SHORT_8_8_MESA, ImageYUV);
+
+ assert(glGetError() == GL_NO_ERROR);
+ glTexSubImage2D(GL_TEXTURE_RECTANGLE_NV, 0,
+ 0, 0, ImgWidth, ImgHeight,
+ GL_YCBCR_MESA, GL_UNSIGNED_SHORT_8_8_MESA, ImageYUV);
+
+ assert(glGetError() == GL_NO_ERROR);
+
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+ glEnable(GL_TEXTURE_RECTANGLE_NV);
+
+ glShadeModel(GL_FLAT);
+ glClearColor(0.3, 0.3, 0.4, 1.0);
+
+ if (argc > 1 && strcmp(argv[1], "-info")==0) {
+ printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+ printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
+ printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
+ printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+ }
+}
+
+
+int main( int argc, char *argv[] )
+{
+ glutInit( &argc, argv );
+ glutInitWindowSize( 300, 300 );
+ glutInitWindowPosition( 0, 0 );
+ glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+ glutCreateWindow(argv[0] );
+
+ Init( argc, argv );
+
+ glutReshapeFunc( Reshape );
+ glutKeyboardFunc( Key );
+ glutSpecialFunc( SpecialKey );
+ glutDisplayFunc( Display );
+
+ glutMainLoop();
+ return 0;
+}
--- /dev/null
+/*
+ * Test the GL_NV_texture_rectangle and GL_MESA_ycrcb_texture extensions.
+ *
+ * Brian Paul 13 September 2002
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+#include "../util/readtex.c" /* I know, this is a hack. */
+
+#define TEXTURE_FILE "../images/tile.rgb"
+
+static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
+static GLint ImgWidth, ImgHeight;
+static GLenum ImgFormat;
+static GLushort *ImageYUV = NULL;
+
+
+static void DrawObject(void)
+{
+ glBegin(GL_QUADS);
+
+ glTexCoord2f(0, 0);
+ glVertex2f(-1.0, -1.0);
+
+ glTexCoord2f(1, 0);
+ glVertex2f(1.0, -1.0);
+
+ glTexCoord2f(1, 1);
+ glVertex2f(1.0, 1.0);
+
+ glTexCoord2f(0, 1);
+ glVertex2f(-1.0, 1.0);
+
+ glEnd();
+}
+
+
+static void Display( void )
+{
+ glClear( GL_COLOR_BUFFER_BIT );
+
+ glPushMatrix();
+ glRotatef(Xrot, 1.0, 0.0, 0.0);
+ glRotatef(Yrot, 0.0, 1.0, 0.0);
+ glRotatef(Zrot, 0.0, 0.0, 1.0);
+ DrawObject();
+ 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, 10.0, 100.0 );
+ glMatrixMode( GL_MODELVIEW );
+ glLoadIdentity();
+ glTranslatef( 0.0, 0.0, -15.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+ (void) x;
+ (void) y;
+ switch (key) {
+ case 27:
+ exit(0);
+ break;
+ }
+ glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+ float 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();
+}
+
+
+#define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
+
+static void ConvertRGBtoYUV(GLint w, GLint h, GLint texel_bytes,
+ const GLubyte *src,
+ GLushort *dest)
+{
+ GLint i, j;
+
+ for (i = 0; i < h; i++) {
+ for (j = 0; j < w; j++) {
+ const GLfloat r = (src[0]) / 255.0;
+ const GLfloat g = (src[1]) / 255.0;
+ const GLfloat b = (src[2]) / 255.0;
+ GLfloat y, cr, cb;
+ GLint iy, icr, icb;
+
+ y = r * 65.481 + g * 128.553 + b * 24.966 + 16;
+ cb = r * -37.797 + g * -74.203 + b * 112.0 + 128;
+ cr = r * 112.0 + g * -93.786 + b * -18.214 + 128;
+ /*printf("%f %f %f -> %f %f %f\n", r, g, b, y, cb, cr);*/
+ iy = (GLint) CLAMP(y, 0, 254);
+ icb = (GLint) CLAMP(cb, 0, 254);
+ icr = (GLint) CLAMP(cr, 0, 254);
+
+ if (j & 1) {
+ /* odd */
+ *dest = (iy << 8) | icr;
+ }
+ else {
+ /* even */
+ *dest = (iy << 8) | icb;
+ }
+ dest++;
+ src += texel_bytes;
+ }
+ }
+}
+
+
+/*
+ * Load an SGI .rgb file and return a pointer to the image data.
+ * Input: imageFile - name of .rgb to read
+ * Output: width - width of image
+ * height - height of image
+ * format - format of image (GL_RGB or GL_RGBA)
+ * Return: pointer to image data or NULL if error
+ */
+GLushort *LoadYUVImage( const char *imageFile, GLint *width, GLint *height,
+ GLenum *format )
+{
+ TK_RGBImageRec *image;
+ GLint bytes;
+ GLushort *buffer;
+
+ image = tkRGBImageLoad( imageFile );
+ if (!image) {
+ return NULL;
+ }
+
+ if (image->components==3) {
+ *format = GL_RGB;
+ }
+ else if (image->components==4) {
+ *format = GL_RGBA;
+ }
+ else {
+ /* not implemented */
+ fprintf(stderr,
+ "Error in LoadYUVImage %d-component images not implemented\n",
+ image->components );
+ return NULL;
+ }
+
+ *width = image->sizeX;
+ *height = image->sizeY;
+
+ buffer = (GLushort *) malloc( image->sizeX * image->sizeY * 2 );
+
+ if (buffer)
+ ConvertRGBtoYUV( image->sizeX,
+ image->sizeY,
+ image->components,
+ image->data,
+ buffer );
+
+
+ FreeImage(image);
+ return buffer;
+}
+
+
+
+/* #define LINEAR_FILTER */
+
+static void Init( int argc, char *argv[] )
+{
+ GLuint texObj = 100;
+ const char *file;
+ int error;
+
+ if (!glutExtensionSupported("GL_MESA_ycbcr_texture")) {
+ printf("Sorry, GL_MESA_ycbcr_texture is required\n");
+ exit(0);
+ }
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+ glBindTexture(GL_TEXTURE_2D, texObj);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ if (argc > 1)
+ file = argv[1];
+ else
+ file = TEXTURE_FILE;
+
+ ImageYUV = LoadYUVImage(file, &ImgWidth, &ImgHeight, &ImgFormat);
+ if (!ImageYUV) {
+ printf("Couldn't read %s\n", TEXTURE_FILE);
+ exit(0);
+ }
+
+ printf("Image: %dx%d\n", ImgWidth, ImgHeight);
+
+/* error = gluBuild2DMipmaps( GL_TEXTURE_2D, */
+/* GL_YCBCR_MESA, */
+/* ImgWidth, ImgHeight, */
+/* GL_YCBCR_MESA, */
+/* GL_UNSIGNED_SHORT_8_8_MESA, */
+/* ImageYUV ); */
+
+
+
+#if 0
+ glTexImage2D(GL_TEXTURE_2D, 0,
+ GL_RGB,
+ ImgWidth, ImgHeight, 0,
+ GL_RGB,
+ GL_UNSIGNED_SHORT_5_6_5, ImageYUV);
+#else
+ glTexImage2D(GL_TEXTURE_2D, 0,
+ GL_YCBCR_MESA,
+ ImgWidth, ImgHeight, 0,
+ GL_YCBCR_MESA,
+ GL_UNSIGNED_SHORT_8_8_MESA, ImageYUV);
+#endif
+
+ glEnable(GL_TEXTURE_2D);
+
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+
+ glShadeModel(GL_FLAT);
+ glClearColor(0.3, 0.3, 0.4, 1.0);
+
+ if (argc > 1 && strcmp(argv[1], "-info")==0) {
+ printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+ printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
+ printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
+ printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+ }
+}
+
+
+int main( int argc, char *argv[] )
+{
+ glutInit( &argc, argv );
+ glutInitWindowSize( 300, 300 );
+ glutInitWindowPosition( 0, 0 );
+ glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+ glutCreateWindow(argv[0] );
+
+ Init( argc, argv );
+
+ glutReshapeFunc( Reshape );
+ glutKeyboardFunc( Key );
+ glutSpecialFunc( SpecialKey );
+ glutDisplayFunc( Display );
+
+ glutMainLoop();
+ return 0;
+}
projects / mesa.git / commitdiff