vptest2 \
vptest3 \
vptorus \
- vpwarpmesh
+ vpwarpmesh \
+ yuvrect \
+ yuvsquare
##### RULES #####
-/* $Id: texrect.c,v 1.2 2002/10/15 14:43:55 brianp Exp $ */
+/* $Id: texrect.c,v 1.3 2003/05/20 09:54:58 keithw Exp $ */
/* GL_NV_texture_rectangle test
*
#include <string.h>
#include <GL/glut.h>
-#include "readtex.c" /* I know, this is a hack. */
-
#define TEXTURE_0_FILE "../images/girl.rgb"
#define TEXTURE_1_FILE "../images/reflect.rgb"
static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
static GLint ImgWidth, ImgHeight;
static GLenum ImgFormat;
-static GLubyte *Image = NULL;
static GLushort *ImageYUV = NULL;
}
-#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[] )
{
else
file = TEXTURE_FILE;
- Image = LoadRGBImage(file, &ImgWidth, &ImgHeight, &ImgFormat);
- if (!Image) {
+ ImageYUV = LoadYUVImage(file, &ImgWidth, &ImgHeight);
+ if (!ImageYUV) {
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);
static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
static GLint ImgWidth, ImgHeight;
-static GLenum ImgFormat;
static GLushort *ImageYUV = NULL;
#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 */
else
file = TEXTURE_FILE;
- ImageYUV = LoadYUVImage(file, &ImgWidth, &ImgHeight, &ImgFormat);
+ ImageYUV = LoadYUVImage(file, &ImgWidth, &ImgHeight );
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);
return buffer;
}
+#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, converted
+ * to 422 yuv.
+ *
+ * Input: imageFile - name of .rgb to read
+ * Output: width - width of image
+ * height - height of image
+ * Return: pointer to image data or NULL if error
+ */
+GLushort *LoadYUVImage( const char *imageFile, GLint *width, GLint *height )
+{
+ TK_RGBImageRec *image;
+ GLint bytes;
+ GLushort *buffer;
+
+ image = tkRGBImageLoad( imageFile );
+ if (!image) {
+ return NULL;
+ }
+
+ if (image->components != 3 && image->components !=4 ) {
+ /* 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;
+}
+
LoadRGBImage( const char *imageFile,
GLint *width, GLint *height, GLenum *format );
+extern GLushort *
+LoadYUVImage( const char *imageFile, GLint *width, GLint *height );
#endif
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