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Diffstat (limited to 'src/mesa/drivers/dri/swrast/swrast_span.c')
-rw-r--r--src/mesa/drivers/dri/swrast/swrast_span.c367
1 files changed, 367 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/swrast/swrast_span.c b/src/mesa/drivers/dri/swrast/swrast_span.c
new file mode 100644
index 0000000000..5e990368b2
--- /dev/null
+++ b/src/mesa/drivers/dri/swrast/swrast_span.c
@@ -0,0 +1,367 @@
+/*
+ * 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]
+
+
+/* 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"
+
+
+/* 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"
+
+
+/* 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_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_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;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-23 13:04:04 +0000