svn merge ^/branches/released . --username marha

1 files changed, 439 insertions, 0 deletions

diff --git a/mesalib/src/mesa/drivers/dri/swrast/swrast_span.c b/mesalib/src/mesa/drivers/dri/swrast/swrast_span.c
new file mode 100644
index 000000000..2d3c25dcb
--- /dev/null
+++ b/mesalib/src/mesa/drivers/dri/swrast/swrast_span.c
@@ -0,0 +1,439 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  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"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * 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.
+ */
+
+/*
+ * Authors:
+ *    George Sapountzis <gsap7@yahoo.gr>
+ */
+
+#include "swrast_priv.h"
+
+#define YFLIP(_xrb, Y) ((_xrb)->Base.Height - (Y) - 1)
+
+/*
+ * Dithering support takes the "computation" extreme in the "computation vs.
+ * storage" trade-off. This approach is very simple to implement and any
+ * computational overhead should be acceptable. XMesa uses table lookups for
+ * around 8KB of storage overhead per visual.
+ */
+#define DITHER 1
+
+static const GLubyte kernel[16] = {
+    0*16,  8*16,  2*16, 10*16,
+   12*16,  4*16, 14*16,  6*16,
+    3*16, 11*16,  1*16,  9*16,
+   15*16,  7*16, 13*16,  5*16,
+};
+
+#if DITHER
+#define DITHER_COMP(X, Y) kernel[((X) & 0x3) | (((Y) & 0x3) << 2)]
+
+#define DITHER_CLAMP(X) (((X) < CHAN_MAX) ? (X) : CHAN_MAX)
+#else
+#define DITHER_COMP(X, Y) 0
+
+#define DITHER_CLAMP(X) (X)
+#endif
+
+
+/*
+ * Pixel macros shared across front/back buffer span functions.
+ */
+
+/* 32-bit BGRA */
+#define STORE_PIXEL_A8R8G8B8(DST, X, Y, VALUE) \
+   DST[3] = VALUE[ACOMP]; \
+   DST[2] = VALUE[RCOMP]; \
+   DST[1] = VALUE[GCOMP]; \
+   DST[0] = VALUE[BCOMP]
+#define STORE_PIXEL_RGB_A8R8G8B8(DST, X, Y, VALUE) \
+   DST[3] = 0xff; \
+   DST[2] = VALUE[RCOMP]; \
+   DST[1] = VALUE[GCOMP]; \
+   DST[0] = VALUE[BCOMP]
+#define FETCH_PIXEL_A8R8G8B8(DST, SRC) \
+   DST[ACOMP] = SRC[3]; \
+   DST[RCOMP] = SRC[2]; \
+   DST[GCOMP] = SRC[1]; \
+   DST[BCOMP] = SRC[0]
+
+
+/* 32-bit BGRX */
+#define STORE_PIXEL_X8R8G8B8(DST, X, Y, VALUE) \
+   DST[3] = 0xff; \
+   DST[2] = VALUE[RCOMP]; \
+   DST[1] = VALUE[GCOMP]; \
+   DST[0] = VALUE[BCOMP]
+#define STORE_PIXEL_RGB_X8R8G8B8(DST, X, Y, VALUE) \
+   DST[3] = 0xff; \
+   DST[2] = VALUE[RCOMP]; \
+   DST[1] = VALUE[GCOMP]; \
+   DST[0] = VALUE[BCOMP]
+#define FETCH_PIXEL_X8R8G8B8(DST, SRC) \
+   DST[ACOMP] = 0xff; \
+   DST[RCOMP] = SRC[2]; \
+   DST[GCOMP] = SRC[1]; \
+   DST[BCOMP] = SRC[0]
+
+
+/* 16-bit BGR */
+#define STORE_PIXEL_R5G6B5(DST, X, Y, VALUE) \
+   do { \
+   int d = DITHER_COMP(X, Y) >> 6; \
+   GLushort *p = (GLushort *)DST; \
+   *p = ( ((DITHER_CLAMP((VALUE[RCOMP]) + d) & 0xf8) << 8) | \
+	  ((DITHER_CLAMP((VALUE[GCOMP]) + d) & 0xfc) << 3) | \
+	  ((DITHER_CLAMP((VALUE[BCOMP]) + d) & 0xf8) >> 3) ); \
+   } while(0)
+#define FETCH_PIXEL_R5G6B5(DST, SRC) \
+   do { \
+   GLushort p = *(GLushort *)SRC; \
+   DST[ACOMP] = 0xff; \
+   DST[RCOMP] = ((p >> 8) & 0xf8) * 255 / 0xf8; \
+   DST[GCOMP] = ((p >> 3) & 0xfc) * 255 / 0xfc; \
+   DST[BCOMP] = ((p << 3) & 0xf8) * 255 / 0xf8; \
+   } while(0)
+
+
+/* 8-bit BGR */
+#define STORE_PIXEL_R3G3B2(DST, X, Y, VALUE) \
+   do { \
+   int d = DITHER_COMP(X, Y) >> 3; \
+   GLubyte *p = (GLubyte *)DST; \
+   *p = ( ((DITHER_CLAMP((VALUE[RCOMP]) + d) & 0xe0) >> 5) | \
+	  ((DITHER_CLAMP((VALUE[GCOMP]) + d) & 0xe0) >> 2) | \
+	  ((DITHER_CLAMP((VALUE[BCOMP]) + d) & 0xc0) >> 0) ); \
+   } while(0)
+#define FETCH_PIXEL_R3G3B2(DST, SRC) \
+   do { \
+   GLubyte p = *(GLubyte *)SRC; \
+   DST[ACOMP] = 0xff; \
+   DST[RCOMP] = ((p << 5) & 0xe0) * 255 / 0xe0; \
+   DST[GCOMP] = ((p << 2) & 0xe0) * 255 / 0xe0; \
+   DST[BCOMP] = ((p << 0) & 0xc0) * 255 / 0xc0; \
+   } while(0)
+
+
+/*
+ * Generate code for back-buffer span functions.
+ */
+
+/* 32-bit BGRA */
+#define NAME(FUNC) FUNC##_A8R8G8B8
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X) * 4;
+#define INC_PIXEL_PTR(P) P += 4
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_A8R8G8B8(DST, X, Y, VALUE)
+#define STORE_PIXEL_RGB(DST, X, Y, VALUE) \
+   STORE_PIXEL_RGB_A8R8G8B8(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_A8R8G8B8(DST, SRC)
+
+#include "swrast/s_spantemp.h"
+
+
+/* 32-bit BGRX */
+#define NAME(FUNC) FUNC##_X8R8G8B8
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X) * 4;
+#define INC_PIXEL_PTR(P) P += 4
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_X8R8G8B8(DST, X, Y, VALUE)
+#define STORE_PIXEL_RGB(DST, X, Y, VALUE) \
+   STORE_PIXEL_RGB_X8R8G8B8(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_X8R8G8B8(DST, SRC)
+
+#include "swrast/s_spantemp.h"
+
+
+/* 16-bit BGR */
+#define NAME(FUNC) FUNC##_R5G6B5
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X) * 2;
+#define INC_PIXEL_PTR(P) P += 2
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_R5G6B5(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_R5G6B5(DST, SRC)
+
+#include "swrast/s_spantemp.h"
+
+
+/* 8-bit BGR */
+#define NAME(FUNC) FUNC##_R3G3B2
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X) * 1;
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_R3G3B2(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_R3G3B2(DST, SRC)
+
+#include "swrast/s_spantemp.h"
+
+
+/* 8-bit color index */
+#define NAME(FUNC) FUNC##_CI8
+#define CI_MODE
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)xrb->Base.Data + YFLIP(xrb, Y) * xrb->pitch + (X);
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   *DST = VALUE[0]
+#define FETCH_PIXEL(DST, SRC) \
+   DST = SRC[0]
+
+#include "swrast/s_spantemp.h"
+
+
+/*
+ * Generate code for front-buffer span functions.
+ */
+
+/* 32-bit BGRA */
+#define NAME(FUNC) FUNC##_A8R8G8B8_front
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)row;
+#define INC_PIXEL_PTR(P) P += 4
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_A8R8G8B8(DST, X, Y, VALUE)
+#define STORE_PIXEL_RGB(DST, X, Y, VALUE) \
+   STORE_PIXEL_RGB_A8R8G8B8(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_A8R8G8B8(DST, SRC)
+
+#include "swrast_spantemp.h"
+
+
+/* 32-bit BGRX */
+#define NAME(FUNC) FUNC##_X8R8G8B8_front
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)row;
+#define INC_PIXEL_PTR(P) P += 4
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_X8R8G8B8(DST, X, Y, VALUE)
+#define STORE_PIXEL_RGB(DST, X, Y, VALUE) \
+   STORE_PIXEL_RGB_X8R8G8B8(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_X8R8G8B8(DST, SRC)
+
+#include "swrast_spantemp.h"
+
+
+/* 16-bit BGR */
+#define NAME(FUNC) FUNC##_R5G6B5_front
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)row;
+#define INC_PIXEL_PTR(P) P += 2
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_R5G6B5(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_R5G6B5(DST, SRC)
+
+#include "swrast_spantemp.h"
+
+
+/* 8-bit BGR */
+#define NAME(FUNC) FUNC##_R3G3B2_front
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)row;
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   STORE_PIXEL_R3G3B2(DST, X, Y, VALUE)
+#define FETCH_PIXEL(DST, SRC) \
+   FETCH_PIXEL_R3G3B2(DST, SRC)
+
+#include "swrast_spantemp.h"
+
+
+/* 8-bit color index */
+#define NAME(FUNC) FUNC##_CI8_front
+#define CI_MODE
+#define RB_TYPE GLubyte
+#define SPAN_VARS \
+   struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
+#define INIT_PIXEL_PTR(P, X, Y) \
+   GLubyte *P = (GLubyte *)row;
+#define INC_PIXEL_PTR(P) P += 1
+#define STORE_PIXEL(DST, X, Y, VALUE) \
+   *DST = VALUE[0]
+#define FETCH_PIXEL(DST, SRC) \
+   DST = SRC[0]
+
+#include "swrast_spantemp.h"
+
+
+/*
+ * Back-buffers are malloced memory and always private.
+ *
+ * BACK_PIXMAP (not supported)
+ * BACK_XIMAGE
+ */
+void
+swrast_set_span_funcs_back(struct swrast_renderbuffer *xrb,
+			   GLuint pixel_format)
+{
+    switch (pixel_format) {
+    case PF_A8R8G8B8:
+	xrb->Base.GetRow = get_row_A8R8G8B8;
+	xrb->Base.GetValues = get_values_A8R8G8B8;
+	xrb->Base.PutRow = put_row_A8R8G8B8;
+	xrb->Base.PutRowRGB = put_row_rgb_A8R8G8B8;
+	xrb->Base.PutMonoRow = put_mono_row_A8R8G8B8;
+	xrb->Base.PutValues = put_values_A8R8G8B8;
+	xrb->Base.PutMonoValues = put_mono_values_A8R8G8B8;
+	break;
+    case PF_X8R8G8B8:
+	xrb->Base.GetRow = get_row_X8R8G8B8;
+	xrb->Base.GetValues = get_values_X8R8G8B8;
+	xrb->Base.PutRow = put_row_X8R8G8B8;
+	xrb->Base.PutRowRGB = put_row_rgb_X8R8G8B8;
+	xrb->Base.PutMonoRow = put_mono_row_X8R8G8B8;
+	xrb->Base.PutValues = put_values_X8R8G8B8;
+	xrb->Base.PutMonoValues = put_mono_values_X8R8G8B8;
+	break;
+    case PF_R5G6B5:
+	xrb->Base.GetRow = get_row_R5G6B5;
+	xrb->Base.GetValues = get_values_R5G6B5;
+	xrb->Base.PutRow = put_row_R5G6B5;
+	xrb->Base.PutRowRGB = put_row_rgb_R5G6B5;
+	xrb->Base.PutMonoRow = put_mono_row_R5G6B5;
+	xrb->Base.PutValues = put_values_R5G6B5;
+	xrb->Base.PutMonoValues = put_mono_values_R5G6B5;
+	break;
+    case PF_R3G3B2:
+	xrb->Base.GetRow = get_row_R3G3B2;
+	xrb->Base.GetValues = get_values_R3G3B2;
+	xrb->Base.PutRow = put_row_R3G3B2;
+	xrb->Base.PutRowRGB = put_row_rgb_R3G3B2;
+	xrb->Base.PutMonoRow = put_mono_row_R3G3B2;
+	xrb->Base.PutValues = put_values_R3G3B2;
+	xrb->Base.PutMonoValues = put_mono_values_R3G3B2;
+	break;
+    case PF_CI8:
+	xrb->Base.GetRow = get_row_CI8;
+	xrb->Base.GetValues = get_values_CI8;
+	xrb->Base.PutRow = put_row_CI8;
+	xrb->Base.PutMonoRow = put_mono_row_CI8;
+	xrb->Base.PutValues = put_values_CI8;
+	xrb->Base.PutMonoValues = put_mono_values_CI8;
+	break;
+    default:
+	assert(0);
+	return;
+    }
+}
+
+
+/*
+ * Front-buffers are provided by the loader, the xorg loader uses pixmaps.
+ *
+ * WINDOW,          An X window
+ * GLXWINDOW,       GLX window
+ * PIXMAP,          GLX pixmap
+ * PBUFFER          GLX Pbuffer
+ */
+void
+swrast_set_span_funcs_front(struct swrast_renderbuffer *xrb,
+			    GLuint pixel_format)
+{
+    switch (pixel_format) {
+    case PF_A8R8G8B8:
+	xrb->Base.GetRow = get_row_A8R8G8B8_front;
+	xrb->Base.GetValues = get_values_A8R8G8B8_front;
+	xrb->Base.PutRow = put_row_A8R8G8B8_front;
+	xrb->Base.PutRowRGB = put_row_rgb_A8R8G8B8_front;
+	xrb->Base.PutMonoRow = put_mono_row_A8R8G8B8_front;
+	xrb->Base.PutValues = put_values_A8R8G8B8_front;
+	xrb->Base.PutMonoValues = put_mono_values_A8R8G8B8_front;
+	break;
+    case PF_X8R8G8B8:
+	xrb->Base.GetRow = get_row_X8R8G8B8_front;
+	xrb->Base.GetValues = get_values_X8R8G8B8_front;
+	xrb->Base.PutRow = put_row_X8R8G8B8_front;
+	xrb->Base.PutRowRGB = put_row_rgb_X8R8G8B8_front;
+	xrb->Base.PutMonoRow = put_mono_row_X8R8G8B8_front;
+	xrb->Base.PutValues = put_values_X8R8G8B8_front;
+	xrb->Base.PutMonoValues = put_mono_values_X8R8G8B8_front;
+	break;
+    case PF_R5G6B5:
+	xrb->Base.GetRow = get_row_R5G6B5_front;
+	xrb->Base.GetValues = get_values_R5G6B5_front;
+	xrb->Base.PutRow = put_row_R5G6B5_front;
+	xrb->Base.PutRowRGB = put_row_rgb_R5G6B5_front;
+	xrb->Base.PutMonoRow = put_mono_row_R5G6B5_front;
+	xrb->Base.PutValues = put_values_R5G6B5_front;
+	xrb->Base.PutMonoValues = put_mono_values_R5G6B5_front;
+	break;
+    case PF_R3G3B2:
+	xrb->Base.GetRow = get_row_R3G3B2_front;
+	xrb->Base.GetValues = get_values_R3G3B2_front;
+	xrb->Base.PutRow = put_row_R3G3B2_front;
+	xrb->Base.PutRowRGB = put_row_rgb_R3G3B2_front;
+	xrb->Base.PutMonoRow = put_mono_row_R3G3B2_front;
+	xrb->Base.PutValues = put_values_R3G3B2_front;
+	xrb->Base.PutMonoValues = put_mono_values_R3G3B2_front;
+	break;
+    case PF_CI8:
+	xrb->Base.GetRow = get_row_CI8_front;
+	xrb->Base.GetValues = get_values_CI8_front;
+	xrb->Base.PutRow = put_row_CI8_front;
+	xrb->Base.PutMonoRow = put_mono_row_CI8_front;
+	xrb->Base.PutValues = put_values_CI8_front;
+	xrb->Base.PutMonoValues = put_mono_values_CI8_front;
+	break;
+    default:
+	assert(0);
+	return;
+    }
+}