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Diffstat (limited to 'src/draw/ao_blt.c')
-rw-r--r--src/draw/ao_blt.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/src/draw/ao_blt.c b/src/draw/ao_blt.c
new file mode 100644
index 00000000..e3f45221
--- /dev/null
+++ b/src/draw/ao_blt.c
@@ -0,0 +1,294 @@
+/*
+ * Copyright © 2016 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#include "ao.h"
+#include "ao_draw.h"
+#include "ao_draw_int.h"
+
+#define O 0
+#define I AO_ALLONES
+
+struct ao_merge_rop {
+ uint32_t ca1, cx1, ca2, cx2;
+};
+
+const struct ao_merge_rop ao_merge_rop[16] = {
+ {O, O, O, O}, /* clear 0x0 0 */
+ {I, O, O, O}, /* and 0x1 src AND dst */
+ {I, O, I, O}, /* andReverse 0x2 src AND NOT dst */
+ {O, O, I, O}, /* copy 0x3 src */
+ {I, I, O, O}, /* andInverted 0x4 NOT src AND dst */
+ {O, I, O, O}, /* noop 0x5 dst */
+ {O, I, I, O}, /* xor 0x6 src XOR dst */
+ {I, I, I, O}, /* or 0x7 src OR dst */
+ {I, I, I, I}, /* nor 0x8 NOT src AND NOT dst */
+ {O, I, I, I}, /* equiv 0x9 NOT src XOR dst */
+ {O, I, O, I}, /* invert 0xa NOT dst */
+ {I, I, O, I}, /* orReverse 0xb src OR NOT dst */
+ {O, O, I, I}, /* copyInverted 0xc NOT src */
+ {I, O, I, I}, /* orInverted 0xd NOT src OR dst */
+ {I, O, O, I}, /* nand 0xe NOT src OR NOT dst */
+ {O, O, O, I}, /* set 0xf 1 */
+};
+
+#define ao_do_merge_rop(src, dst) \
+ (((dst) & (((src) & _ca1) ^ _cx1)) ^ (((src) & _ca2) ^ _cx2))
+
+#define ao_do_dst_invarient_merge_rop(src) (((src) & _ca2) ^ _cx2)
+
+#define ao_do_mask_merge_rop(src, dst, mask) \
+ (((dst) & ((((src) & _ca1) ^ _cx1) | ~(mask))) ^ ((((src) & _ca2) ^ _cx2) & (mask)))
+
+#define ao_dst_invarient_merge_rop() (_ca1 == 0 && _cx1 == 0)
+
+void
+ao_blt(uint32_t *src_line,
+ int16_t src_stride,
+ int16_t src_x,
+ uint32_t *dst_line,
+ int16_t dst_stride,
+ int16_t dst_x,
+ int16_t width,
+ int16_t height,
+ uint8_t rop,
+ uint8_t reverse,
+ uint8_t upsidedown)
+{
+ uint32_t *src, *dst;
+ uint32_t _ca1, _cx1, _ca2, _cx2;
+ uint8_t dst_invarient;
+ uint32_t startmask, endmask;
+ int16_t nmiddle, n;
+ uint32_t bits1, bits;
+ int16_t left_shift, right_shift;
+
+ _ca1 = ao_merge_rop[rop].ca1;
+ _cx1 = ao_merge_rop[rop].cx1;
+ _ca2 = ao_merge_rop[rop].ca2;
+ _cx2 = ao_merge_rop[rop].cx2;
+ dst_invarient = ao_dst_invarient_merge_rop();
+
+ if (upsidedown) {
+ src_line += (height - 1) * src_stride;
+ dst_line += (height - 1) * dst_stride;
+ src_stride = -src_stride;
+ dst_stride = -dst_stride;
+ }
+
+ ao_mask_bits(dst_x, width, startmask, nmiddle, endmask);
+ if (reverse) {
+ src_line += ((src_x + width - 1) >> AO_SHIFT) + 1;
+ dst_line += ((dst_x + width - 1) >> AO_SHIFT) + 1;
+ src_x = (src_x + width - 1) & AO_MASK;
+ dst_x = (dst_x + width - 1) & AO_MASK;
+ } else {
+ src_line += src_x >> AO_SHIFT;
+ dst_line += dst_x >> AO_SHIFT;
+ src_x &= AO_MASK;
+ dst_x &= AO_MASK;
+ }
+ if (src_x == dst_x) {
+ while (height--) {
+ src = src_line;
+ src_line += src_stride;
+ dst = dst_line;
+ dst_line += dst_stride;
+ if (reverse) {
+ if (endmask) {
+ bits = *--src;
+ --dst;
+ *dst = ao_do_mask_merge_rop(bits, *dst, endmask);
+ }
+ n = nmiddle;
+ if (dst_invarient) {
+ while (n--)
+ *--dst = ao_do_dst_invarient_merge_rop(*--src);
+ }
+ else {
+ while (n--) {
+ bits = *--src;
+ --dst;
+ *dst = ao_do_merge_rop(bits, *dst);
+ }
+ }
+ if (startmask) {
+ bits = *--src;
+ --dst;
+ *dst = ao_do_mask_merge_rop(bits, *dst, startmask);
+ }
+ }
+ else {
+ if (startmask) {
+ bits = *src++;
+ *dst = ao_do_mask_merge_rop(bits, *dst, startmask);
+ dst++;
+ }
+ n = nmiddle;
+ if (dst_invarient) {
+ while (n--)
+ *dst++ = ao_do_dst_invarient_merge_rop(*src++);
+ }
+ else {
+ while (n--) {
+ bits = *src++;
+ *dst = ao_do_merge_rop(bits, *dst);
+ dst++;
+ }
+ }
+ if (endmask) {
+ bits = *src;
+ *dst = ao_do_mask_merge_rop(bits, *dst, endmask);
+ }
+ }
+ }
+ } else {
+ if (src_x > dst_x) {
+ left_shift = src_x - dst_x;
+ right_shift = AO_UNIT - left_shift;
+ } else {
+ right_shift = dst_x - src_x;
+ left_shift = AO_UNIT - right_shift;
+ }
+ while (height--) {
+ src = src_line;
+ src_line += src_stride;
+ dst = dst_line;
+ dst_line += dst_stride;
+
+ bits1 = 0;
+ if (reverse) {
+ if (src_x < dst_x)
+ bits1 = *--src;
+ if (endmask) {
+ bits = ao_right(bits1, right_shift);
+ if (ao_right(endmask, left_shift)) {
+ bits1 = *--src;
+ bits |= ao_left(bits1, left_shift);
+ }
+ --dst;
+ *dst = ao_do_mask_merge_rop(bits, *dst, endmask);
+ }
+ n = nmiddle;
+ if (dst_invarient) {
+ while (n--) {
+ bits = ao_right(bits1, right_shift);
+ bits1 = *--src;
+ bits |= ao_left(bits1, left_shift);
+ --dst;
+ *dst = ao_do_dst_invarient_merge_rop(bits);
+ }
+ } else {
+ while (n--) {
+ bits = ao_right(bits1, right_shift);
+ bits1 = *--src;
+ bits |= ao_left(bits1, left_shift);
+ --dst;
+ *dst = ao_do_merge_rop(bits, *dst);
+ }
+ }
+ if (startmask) {
+ bits = ao_right(bits1, right_shift);
+ if (ao_right(startmask, left_shift)) {
+ bits1 = *--src;
+ bits |= ao_left(bits1, left_shift);
+ }
+ --dst;
+ *dst = ao_do_mask_merge_rop(bits, *dst, startmask);
+ }
+ }
+ else {
+ if (src_x > dst_x)
+ bits1 = *src++;
+ if (startmask) {
+ bits = ao_left(bits1, left_shift);
+ if (ao_left(startmask, right_shift)) {
+ bits1 = *src++;
+ bits |= ao_right(bits1, right_shift);
+ }
+ *dst = ao_do_mask_merge_rop(bits, *dst, startmask);
+ dst++;
+ }
+ n = nmiddle;
+ if (dst_invarient) {
+ while (n--) {
+ bits = ao_left(bits1, left_shift);
+ bits1 = *src++;
+ bits |= ao_right(bits1, right_shift);
+ *dst = ao_do_dst_invarient_merge_rop(bits);
+ dst++;
+ }
+ }
+ else {
+ while (n--) {
+ bits = ao_left(bits1, left_shift);
+ bits1 = *src++;
+ bits |= ao_right(bits1, right_shift);
+ *dst = ao_do_merge_rop(bits, *dst);
+ dst++;
+ }
+ }
+ if (endmask) {
+ bits = ao_left(bits1, left_shift);
+ if (ao_left(endmask, right_shift)) {
+ bits1 = *src;
+ bits |= ao_right(bits1, right_shift);
+ }
+ *dst = ao_do_mask_merge_rop(bits, *dst, endmask);
+ }
+ }
+ }
+ }
+}
+
+void
+ao_solid(uint32_t and,
+ uint32_t xor,
+ uint32_t *dst,
+ int16_t dst_stride,
+ int16_t dst_x,
+ int16_t width,
+ int16_t height)
+{
+ uint32_t startmask, endmask;
+ int16_t nmiddle;
+ int16_t n;
+
+ dst += dst_x >> AO_SHIFT;
+ dst_x &= AO_MASK;
+
+ ao_mask_bits(dst_x, width, startmask, nmiddle, endmask);
+
+ if (startmask)
+ dst_stride--;
+
+ dst_stride -= nmiddle;
+ while (height--) {
+ if (startmask) {
+ *dst = ao_do_mask_rrop(*dst, and, xor, startmask);
+ dst++;
+ }
+ n = nmiddle;
+ if (!and)
+ while (n--)
+ *dst++ = xor;
+ else
+ while (n--) {
+ *dst = ao_do_rrop(*dst, and, xor);
+ dst++;
+ }
+ if (endmask)
+ *dst = ao_do_mask_rrop(*dst, and, xor, endmask);
+ dst += dst_stride;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-11-04 05:24:45 +0000