summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authordok666 <dok666>2003-05-21 17:05:09 +0000
committerdok666 <dok666>2003-05-21 17:05:09 +0000
commit9467e7e226811cd6327cfd047fead99023c650b9 (patch)
tree88639ab42ad6505a18a0f47fe4265dd2f1367d87
parent7dfd7f2c30106195173e13eae53304e41b9eaa90 (diff)
Test program for GL_MESA_ycbcr_texture.
-rw-r--r--progs/tests/yuvsquare.c233
-rw-r--r--progs/util/readtex.c85
-rw-r--r--progs/util/readtex.h2
3 files changed, 320 insertions, 0 deletions
diff --git a/progs/tests/yuvsquare.c b/progs/tests/yuvsquare.c
new file mode 100644
index 00000000000..494586776a0
--- /dev/null
+++ b/progs/tests/yuvsquare.c
@@ -0,0 +1,233 @@
+/*
+ * 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 GLushort *ImageYUV = NULL;
+static GLubyte *ImageRGB = NULL;
+static const GLuint yuvObj = 100;
+static const GLuint rgbObj = 101;
+
+
+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();
+ glTranslatef( -1.1, 0.0, -15.0 );
+ glRotatef(Xrot, 1.0, 0.0, 0.0);
+ glRotatef(Yrot, 0.0, 1.0, 0.0);
+ glRotatef(Zrot, 0.0, 0.0, 1.0);
+ glBindTexture(GL_TEXTURE_2D, yuvObj);
+ DrawObject();
+ glPopMatrix();
+
+ glPushMatrix();
+ glTranslatef( 1.1, 0.0, -15.0 );
+ glRotatef(Xrot, 1.0, 0.0, 0.0);
+ glRotatef(Yrot, 0.0, 1.0, 0.0);
+ glRotatef(Zrot, 0.0, 0.0, 1.0);
+ glBindTexture(GL_TEXTURE_2D, rgbObj);
+ DrawObject();
+ glPopMatrix();
+
+ glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+ glViewport( 0, 0, width, height );
+ glMatrixMode( GL_PROJECTION );
+ glLoadIdentity();
+ glFrustum( -1.1, 1.1, -1.1, 1.1, 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)) )
+
+
+
+/* #define LINEAR_FILTER */
+
+static void Init( int argc, char *argv[] )
+{
+ const char *file;
+ int error;
+ GLenum format;
+
+ if (!glutExtensionSupported("GL_MESA_ycbcr_texture")) {
+ printf("Sorry, GL_MESA_ycbcr_texture is required\n");
+ exit(0);
+ }
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+ if (argc > 1)
+ file = argv[1];
+ else
+ file = TEXTURE_FILE;
+
+ /* First load the texture as YCbCr.
+ */
+
+ glBindTexture(GL_TEXTURE_2D, yuvObj);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ ImageYUV = LoadYUVImage(file, &ImgWidth, &ImgHeight );
+ if (!ImageYUV) {
+ printf("Couldn't read %s\n", TEXTURE_FILE);
+ exit(0);
+ }
+
+ printf("Image: %dx%d\n", ImgWidth, ImgHeight);
+
+
+ glTexImage2D(GL_TEXTURE_2D, 0,
+ GL_YCBCR_MESA,
+ ImgWidth, ImgHeight, 0,
+ GL_YCBCR_MESA,
+ GL_UNSIGNED_SHORT_8_8_MESA, ImageYUV);
+
+ glEnable(GL_TEXTURE_2D);
+
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+
+
+ /* Now load the texture as RGB.
+ */
+
+ glBindTexture(GL_TEXTURE_2D, rgbObj);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ ImageRGB = LoadRGBImage(file, &ImgWidth, &ImgHeight, &format );
+ if (!ImageRGB) {
+ printf("Couldn't read %s\n", TEXTURE_FILE);
+ exit(0);
+ }
+
+ printf("Image: %dx%d\n", ImgWidth, ImgHeight);
+
+
+ glTexImage2D(GL_TEXTURE_2D, 0,
+ format,
+ ImgWidth, ImgHeight, 0,
+ format,
+ GL_UNSIGNED_BYTE, ImageRGB);
+
+ 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));
+ }
+
+ printf( "Both images should appear the same.\n" );
+}
+
+
+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;
+}
diff --git a/progs/util/readtex.c b/progs/util/readtex.c
index d9a5dc78f5c..406498202b2 100644
--- a/progs/util/readtex.c
+++ b/progs/util/readtex.c
@@ -365,3 +365,88 @@ GLubyte *LoadRGBImage( const char *imageFile, GLint *width, GLint *height,
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;
+}
+
diff --git a/progs/util/readtex.h b/progs/util/readtex.h
index 8e544f1fb82..6c9a3828d38 100644
--- a/progs/util/readtex.h
+++ b/progs/util/readtex.h
@@ -20,5 +20,7 @@ extern GLubyte *
LoadRGBImage( const char *imageFile,
GLint *width, GLint *height, GLenum *format );
+extern GLushort *
+LoadYUVImage( const char *imageFile, GLint *width, GLint *height );
#endif