-/* $Id: texformat_tmp.h,v 1.2 2001/03/18 13:34:24 gareth Exp $ */
+/**
+ * \file texformat_tmp.h
+ * Texel fetch functions template.
+ *
+ * This template file is used by texformat.c to generate texel fetch functions
+ * for 1-D, 2-D and 3-D texture images.
+ *
+ * It should be expanded by definining \p DIM as the number texture dimensions
+ * (1, 2 or 3). According to the value of \p DIM a serie of macros is defined
+ * for the texel lookup in the gl_texture_image::Data.
+ *
+ * \sa texformat.c and FetchTexel.
+ *
+ * \author Gareth Hughes
+ * \author Brian Paul
+ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 5.1
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Author:
- * Gareth Hughes <gareth@valinux.com>
*/
+
#if DIM == 1
#define CHAN_SRC( t, i, j, k, sz ) \
#elif DIM == 2
#define CHAN_SRC( t, i, j, k, sz ) \
- ((GLchan *)(t)->Data + ((t)->Width * (j) + (i)) * (sz))
+ ((GLchan *)(t)->Data + ((t)->RowStride * (j) + (i)) * (sz))
#define UBYTE_SRC( t, i, j, k, sz ) \
- ((GLubyte *)(t)->Data + ((t)->Width * (j) + (i)) * (sz))
+ ((GLubyte *)(t)->Data + ((t)->RowStride * (j) + (i)) * (sz))
#define USHORT_SRC( t, i, j, k ) \
- ((GLushort *)(t)->Data + ((t)->Width * (j) + (i)))
+ ((GLushort *)(t)->Data + ((t)->RowStride * (j) + (i)))
#define FLOAT_SRC( t, i, j, k ) \
- ((GLfloat *)(t)->Data + ((t)->Width * (j) + (i)))
+ ((GLfloat *)(t)->Data + ((t)->RowStride * (j) + (i)))
#define FETCH(x) fetch_2d_texel_##x
#define CHAN_SRC( t, i, j, k, sz ) \
(GLchan *)(t)->Data + (((t)->Height * (k) + (j)) * \
- (t)->Width + (i)) * (sz)
+ (t)->RowStride + (i)) * (sz)
#define UBYTE_SRC( t, i, j, k, sz ) \
((GLubyte *)(t)->Data + (((t)->Height * (k) + (j)) * \
- (t)->Width + (i)) * (sz))
+ (t)->RowStride + (i)) * (sz))
#define USHORT_SRC( t, i, j, k ) \
((GLushort *)(t)->Data + (((t)->Height * (k) + (j)) * \
- (t)->Width + (i)))
+ (t)->RowStride + (i)))
#define FLOAT_SRC( t, i, j, k ) \
((GLfloat *)(t)->Data + (((t)->Height * (k) + (j)) * \
- (t)->Width + (i)))
+ (t)->RowStride + (i)))
#define FETCH(x) fetch_3d_texel_##x
#else
-#error "..."
+#error illegal number of texture dimensions
#endif
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLushort *src = USHORT_SRC( texImage, i, j, k );
- GLchan *rgba = (GLchan *) texel; GLushort s = *src;
+ const GLushort s = *src;
+ GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 8) & 0xf8) * 255 / 0xf8 );
rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 3) & 0xfc) * 255 / 0xfc );
rgba[BCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xf8) * 255 / 0xf8 );
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLushort *src = USHORT_SRC( texImage, i, j, k );
- GLchan *rgba = (GLchan *) texel; GLushort s = *src;
+ const GLushort s = *src;
+ GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 8) & 0xf) * 255 / 0xf );
rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 4) & 0xf) * 255 / 0xf );
rgba[BCOMP] = UBYTE_TO_CHAN( ((s ) & 0xf) * 255 / 0xf );
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLushort *src = USHORT_SRC( texImage, i, j, k );
- GLchan *rgba = (GLchan *) texel; GLushort s = *src;
- rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 10) & 0xf8) * 255 / 0xf8 );
- rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 5) & 0xf8) * 255 / 0xf8 );
- rgba[BCOMP] = UBYTE_TO_CHAN( ((s ) & 0xf8) * 255 / 0xf8 );
+ const GLushort s = *src;
+ GLchan *rgba = (GLchan *) texel;
+ rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 10) & 0x1f) * 255 / 0x1f );
+ rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 5) & 0x1f) * 255 / 0x1f );
+ rgba[BCOMP] = UBYTE_TO_CHAN( ((s ) & 0x1f) * 255 / 0x1f );
rgba[ACOMP] = UBYTE_TO_CHAN( ((s >> 15) & 0x01) * 255 );
}
GLint i, GLint j, GLint k, GLvoid *texel )
{
const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 1 );
- GLchan *rgba = (GLchan *) texel; GLubyte s = *src;
+ const GLubyte s = *src;
+ GLchan *rgba = (GLchan *) texel;
rgba[RCOMP] = UBYTE_TO_CHAN( ((s ) & 0xe0) * 255 / 0xe0 );
rgba[GCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xe0) * 255 / 0xe0 );
rgba[BCOMP] = UBYTE_TO_CHAN( ((s << 5) & 0xc0) * 255 / 0xc0 );
*index = UBYTE_TO_CHAN( *src );
}
+/* XXX this may break if GLchan != GLubyte */
+static void FETCH(ycbcr)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLushort *src0 = USHORT_SRC( texImage, (i & ~1), j, k ); /* even */
+ const GLushort *src1 = src0 + 1; /* odd */
+ const GLubyte y0 = (*src0 >> 8) & 0xff; /* luminance */
+ const GLubyte cb = *src0 & 0xff; /* chroma U */
+ const GLubyte y1 = (*src1 >> 8) & 0xff; /* luminance */
+ const GLubyte cr = *src1 & 0xff; /* chroma V */
+ GLchan *rgba = (GLchan *) texel;
+ GLint r, g, b;
+ if (i & 1) {
+ /* odd pixel: use y1,cr,cb */
+ r = (GLint) (1.164 * (y1-16) + 1.596 * (cr-128));
+ g = (GLint) (1.164 * (y1-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
+ b = (GLint) (1.164 * (y1-16) + 2.018 * (cb-128));
+ }
+ else {
+ /* even pixel: use y0,cr,cb */
+ r = (GLint) (1.164 * (y0-16) + 1.596 * (cr-128));
+ g = (GLint) (1.164 * (y0-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
+ b = (GLint) (1.164 * (y0-16) + 2.018 * (cb-128));
+ }
+ rgba[RCOMP] = CLAMP(r, 0, CHAN_MAX);
+ rgba[GCOMP] = CLAMP(g, 0, CHAN_MAX);
+ rgba[BCOMP] = CLAMP(b, 0, CHAN_MAX);
+ rgba[ACOMP] = CHAN_MAX;
+}
+
+/* XXX this may break if GLchan != GLubyte */
+static void FETCH(ycbcr_rev)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLushort *src0 = USHORT_SRC( texImage, (i & ~1), j, k ); /* even */
+ const GLushort *src1 = src0 + 1; /* odd */
+ const GLubyte y0 = *src0 & 0xff; /* luminance */
+ const GLubyte cr = (*src0 >> 8) & 0xff; /* chroma V */
+ const GLubyte y1 = *src1 & 0xff; /* luminance */
+ const GLubyte cb = (*src1 >> 8) & 0xff; /* chroma U */
+ GLchan *rgba = (GLchan *) texel;
+ GLint r, g, b;
+ if (i & 1) {
+ /* odd pixel: use y1,cr,cb */
+ r = (GLint) (1.164 * (y1-16) + 1.596 * (cr-128));
+ g = (GLint) (1.164 * (y1-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
+ b = (GLint) (1.164 * (y1-16) + 2.018 * (cb-128));
+ }
+ else {
+ /* even pixel: use y0,cr,cb */
+ r = (GLint) (1.164 * (y0-16) + 1.596 * (cr-128));
+ g = (GLint) (1.164 * (y0-16) - 0.813 * (cr-128) - 0.391 * (cb-128));
+ b = (GLint) (1.164 * (y0-16) + 2.018 * (cb-128));
+ }
+ rgba[RCOMP] = CLAMP(r, 0, CHAN_MAX);
+ rgba[GCOMP] = CLAMP(g, 0, CHAN_MAX);
+ rgba[BCOMP] = CLAMP(b, 0, CHAN_MAX);
+ rgba[ACOMP] = CHAN_MAX;
+}
+
+
+#if DIM == 2
+static void FETCH(rgb_fxt1)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ /* Extract the (i,j) pixel from texImage->Data and return it
+ * in texel[RCOMP], texel[GCOMP], texel[BCOMP], texel[ACOMP].
+ */
+}
+#endif
+
+#if DIM == 2
+static void FETCH(rgba_fxt1)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ /* Extract the (i,j) pixel from texImage->Data and return it
+ * in texel[RCOMP], texel[GCOMP], texel[BCOMP], texel[ACOMP].
+ */
+}
+#endif
+
+
+#if DIM == 2
+static void FETCH(rgb_dxt1)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ /* Extract the (i,j) pixel from texImage->Data and return it
+ * in texel[RCOMP], texel[GCOMP], texel[BCOMP], texel[ACOMP].
+ */
+}
+#endif
+
+#if DIM == 2
+static void FETCH(rgba_dxt1)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ /* Extract the (i,j) pixel from texImage->Data and return it
+ * in texel[RCOMP], texel[GCOMP], texel[BCOMP], texel[ACOMP].
+ */
+}
+#endif
+
+#if DIM == 2
+static void FETCH(rgba_dxt3)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ /* Extract the (i,j) pixel from texImage->Data and return it
+ * in texel[RCOMP], texel[GCOMP], texel[BCOMP], texel[ACOMP].
+ */
+}
+#endif
+
+#if DIM == 2
+static void FETCH(rgba_dxt5)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ /* Extract the (i,j) pixel from texImage->Data and return it
+ * in texel[RCOMP], texel[GCOMP], texel[BCOMP], texel[ACOMP].
+ */
+}
+#endif
+
+
+
+/* big-endian */
+
+#if 0
+static void FETCH(abgr8888)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 4 );
+ GLchan *rgba = (GLchan *) texel;
+ rgba[RCOMP] = UBYTE_TO_CHAN( src[3] );
+ rgba[GCOMP] = UBYTE_TO_CHAN( src[2] );
+ rgba[BCOMP] = UBYTE_TO_CHAN( src[1] );
+ rgba[ACOMP] = UBYTE_TO_CHAN( src[0] );
+}
+
+static void FETCH(bgra8888)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 4 );
+ GLchan *rgba = (GLchan *) texel;
+ rgba[RCOMP] = UBYTE_TO_CHAN( src[2] );
+ rgba[GCOMP] = UBYTE_TO_CHAN( src[1] );
+ rgba[BCOMP] = UBYTE_TO_CHAN( src[0] );
+ rgba[ACOMP] = UBYTE_TO_CHAN( src[3] );
+}
+
+static void FETCH(bgr888)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 3 );
+ GLchan *rgba = (GLchan *) texel;
+ rgba[RCOMP] = UBYTE_TO_CHAN( src[2] );
+ rgba[GCOMP] = UBYTE_TO_CHAN( src[1] );
+ rgba[BCOMP] = UBYTE_TO_CHAN( src[0] );
+ rgba[ACOMP] = CHAN_MAX;
+}
+
+static void FETCH(bgr565)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLushort *src = USHORT_SRC( texImage, i, j, k );
+ const GLushort s = *src;
+ GLchan *rgba = (GLchan *) texel;
+ rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 8) & 0xf8) * 255 / 0xf8 );
+ rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 3) & 0xfc) * 255 / 0xfc );
+ rgba[BCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xf8) * 255 / 0xf8 );
+ rgba[ACOMP] = CHAN_MAX;
+}
+
+static void FETCH(bgra4444)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLushort *src = USHORT_SRC( texImage, i, j, k );
+ const GLushort s = *src;
+ GLchan *rgba = (GLchan *) texel;
+ rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 8) & 0xf) * 255 / 0xf );
+ rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 4) & 0xf) * 255 / 0xf );
+ rgba[BCOMP] = UBYTE_TO_CHAN( ((s ) & 0xf) * 255 / 0xf );
+ rgba[ACOMP] = UBYTE_TO_CHAN( ((s >> 12) & 0xf) * 255 / 0xf );
+}
+
+static void FETCH(bgra5551)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLushort *src = USHORT_SRC( texImage, i, j, k );
+ const GLushort s = *src;
+ GLchan *rgba = (GLchan *) texel;
+ rgba[RCOMP] = UBYTE_TO_CHAN( ((s >> 10) & 0x1f) * 255 / 0x1f );
+ rgba[GCOMP] = UBYTE_TO_CHAN( ((s >> 5) & 0x1f) * 255 / 0x1f );
+ rgba[BCOMP] = UBYTE_TO_CHAN( ((s ) & 0x1f) * 255 / 0x1f );
+ rgba[ACOMP] = UBYTE_TO_CHAN( ((s >> 15) & 0x01) * 255 );
+}
+
+static void FETCH(la88)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 2 );
+ GLchan *rgba = (GLchan *) texel;
+ rgba[RCOMP] = UBYTE_TO_CHAN( src[0] );
+ rgba[GCOMP] = UBYTE_TO_CHAN( src[0] );
+ rgba[BCOMP] = UBYTE_TO_CHAN( src[0] );
+ rgba[ACOMP] = UBYTE_TO_CHAN( src[1] );
+}
+
+static void FETCH(bgr233)( const struct gl_texture_image *texImage,
+ GLint i, GLint j, GLint k, GLvoid *texel )
+{
+ const GLubyte *src = UBYTE_SRC( texImage, i, j, k, 1 );
+ const GLubyte s = *src;
+ GLchan *rgba = (GLchan *) texel;
+ rgba[RCOMP] = UBYTE_TO_CHAN( ((s ) & 0xe0) * 255 / 0xe0 );
+ rgba[GCOMP] = UBYTE_TO_CHAN( ((s << 3) & 0xe0) * 255 / 0xe0 );
+ rgba[BCOMP] = UBYTE_TO_CHAN( ((s << 5) & 0xc0) * 255 / 0xc0 );
+ rgba[ACOMP] = CHAN_MAX;
+}
+#endif
+
#undef CHAN_SRC
#undef UBYTE_SRC
projects / mesa.git / blobdiff