aboutsummaryrefslogtreecommitdiff
path: root/backends/platform/ds/arm9/source/blitters.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'backends/platform/ds/arm9/source/blitters.cpp')
-rw-r--r--backends/platform/ds/arm9/source/blitters.cpp272
1 files changed, 272 insertions, 0 deletions
diff --git a/backends/platform/ds/arm9/source/blitters.cpp b/backends/platform/ds/arm9/source/blitters.cpp
new file mode 100644
index 0000000000..5c9e07fd47
--- /dev/null
+++ b/backends/platform/ds/arm9/source/blitters.cpp
@@ -0,0 +1,272 @@
+/* ScummVMDS - Scumm Interpreter DS Port
+ * Copyright (C) 2002-2004 The ScummVM project and Neil Millstone
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include "stdafx.h"
+#define CHARSET_MASK_TRANSPARENCY 253
+
+namespace DS {
+
+void asmDrawStripToScreen(int height, int width, byte const* text, byte const* src, byte* dst,
+ int vsPitch, int vmScreenWidth, int textSurfacePitch) {
+
+
+ if (height <= 0) height = 1;
+ if (width < 4) return;
+
+
+ width &= ~4;
+// src = (const byte *) (((int) (src)) & (~4));
+// dst = (byte *) (((int) (dst)) & (~4));
+// text = (const byte *) (((int) (text)) & (~4));
+
+ asm ( "mov r5, %0\n" // Height
+ "yLoop:\n"
+ "mov r3, #0\n" // X pos
+
+ "xLoop:\n"
+
+ "ldr r4, [%2, r3]\n" // Load text layer word
+ "cmp r4, %5\n"
+ "bne singleByteCompare\n"
+ "ldr r4, [%3, r3]\n"
+ "str r4, [%4, r3]\n"
+ "add r3, r3, #4\n"
+ "cmp r3, %1\n" // x == width?
+ "blt xLoop\n"
+
+ "add %2, %2, %8\n" // src += vs->pitch
+ "add %3, %3, %6\n" // dst += _vm->_screenWidth
+ "add %4, %4, %7\n" // text += _textSurface.pitch
+ "sub r5, r5, #1\n" // y -= 1
+ "cmp r5, #0\n" // y == 0?
+ "bne yLoop\n"
+ "b end\n"
+
+
+ "singleByteCompare:\n"
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "cmps r3, %1\n" // x == width?
+ "blt xLoop\n" // Repeat
+ "add %2, %2, %8\n" // src += vs->pitch
+ "add %3, %3, %6\n" // dst += _vm->_screenWidth
+ "add %4, %4, %7\n" // text += _textSurface.pitch
+ "sub r5, r5, #1\n" // y -= 1
+ "cmp r5, #0\n" // y == 0?
+ "bne yLoop\n"
+
+ "end:\n"
+ : /* no output registers */
+ : "r" (height), "r" (width), "r" (text), "r" (src), "r" (dst), "r" (CHARSET_MASK_TRANSPARENCY | (CHARSET_MASK_TRANSPARENCY << 8) | (CHARSET_MASK_TRANSPARENCY << 16) | (CHARSET_MASK_TRANSPARENCY << 24)),
+ "r" (vsPitch), "r" (vmScreenWidth), "r" (textSurfacePitch)
+ : "r5", "r3", "r4", "%2", "%3", "%4", "memory");
+}
+
+
+
+void asmCopy8Col(byte* dst, int dstPitch, const byte* src, int height) {
+ asm("ands r0, %3, #1\n"
+ "addne %3, %3, #1\n"
+ "bne roll2\n"
+
+ "yLoop2:\n"
+ "ldr r0, [%2, #0]\n"
+ "str r0, [%0, #0]\n"
+ "ldr r0, [%2, #4]\n"
+ "str r0, [%0, #4]\n"
+ "add %0, %0, %1\n"
+ "add %2, %2, %1\n"
+ "roll2:\n"
+ "ldr r0, [%2, #0]\n"
+ "str r0, [%0, #0]\n"
+ "ldr r0, [%2, #4]\n"
+ "str r0, [%0, #4]\n"
+ "add %0, %0, %1\n"
+ "add %2, %2, %1\n"
+ "subs %3, %3, #2\n"
+ "bne yLoop2\n"
+
+ : /* no output registers */
+ : "r" (dst), "r" (dstPitch), "r" (src), "r" (height)
+ : "r0", "%0", "%2", "%3");
+}
+
+}
+/* ScummVMDS - Scumm Interpreter DS Port
+ * Copyright (C) 2002-2004 The ScummVM project and Neil Millstone
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include "stdafx.h"
+#define CHARSET_MASK_TRANSPARENCY 253
+
+namespace DS {
+
+void asmDrawStripToScreen(int height, int width, byte const* text, byte const* src, byte* dst,
+ int vsPitch, int vmScreenWidth, int textSurfacePitch) {
+
+
+ if (height <= 0) height = 1;
+ if (width < 4) return;
+
+
+ width &= ~4;
+// src = (const byte *) (((int) (src)) & (~4));
+// dst = (byte *) (((int) (dst)) & (~4));
+// text = (const byte *) (((int) (text)) & (~4));
+
+ asm ( "mov r5, %0\n" // Height
+ "yLoop:\n"
+ "mov r3, #0\n" // X pos
+
+ "xLoop:\n"
+
+ "ldr r4, [%2, r3]\n" // Load text layer word
+ "cmp r4, %5\n"
+ "bne singleByteCompare\n"
+ "ldr r4, [%3, r3]\n"
+ "str r4, [%4, r3]\n"
+ "add r3, r3, #4\n"
+ "cmp r3, %1\n" // x == width?
+ "blt xLoop\n"
+
+ "add %2, %2, %8\n" // src += vs->pitch
+ "add %3, %3, %6\n" // dst += _vm->_screenWidth
+ "add %4, %4, %7\n" // text += _textSurface.pitch
+ "sub r5, r5, #1\n" // y -= 1
+ "cmp r5, #0\n" // y == 0?
+ "bne yLoop\n"
+ "b end\n"
+
+
+ "singleByteCompare:\n"
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "cmps r3, %1\n" // x == width?
+ "blt xLoop\n" // Repeat
+ "add %2, %2, %8\n" // src += vs->pitch
+ "add %3, %3, %6\n" // dst += _vm->_screenWidth
+ "add %4, %4, %7\n" // text += _textSurface.pitch
+ "sub r5, r5, #1\n" // y -= 1
+ "cmp r5, #0\n" // y == 0?
+ "bne yLoop\n"
+
+ "end:\n"
+ : /* no output registers */
+ : "r" (height), "r" (width), "r" (text), "r" (src), "r" (dst), "r" (CHARSET_MASK_TRANSPARENCY | (CHARSET_MASK_TRANSPARENCY << 8) | (CHARSET_MASK_TRANSPARENCY << 16) | (CHARSET_MASK_TRANSPARENCY << 24)),
+ "r" (vsPitch), "r" (vmScreenWidth), "r" (textSurfacePitch)
+ : "r5", "r3", "r4", "%2", "%3", "%4", "memory");
+}
+
+
+
+void asmCopy8Col(byte* dst, int dstPitch, const byte* src, int height) {
+ asm("ands r0, %3, #1\n"
+ "addne %3, %3, #1\n"
+ "bne roll2\n"
+
+ "yLoop2:\n"
+ "ldr r0, [%2, #0]\n"
+ "str r0, [%0, #0]\n"
+ "ldr r0, [%2, #4]\n"
+ "str r0, [%0, #4]\n"
+ "add %0, %0, %1\n"
+ "add %2, %2, %1\n"
+ "roll2:\n"
+ "ldr r0, [%2, #0]\n"
+ "str r0, [%0, #0]\n"
+ "ldr r0, [%2, #4]\n"
+ "str r0, [%0, #4]\n"
+ "add %0, %0, %1\n"
+ "add %2, %2, %1\n"
+ "subs %3, %3, #2\n"
+ "bne yLoop2\n"
+
+ : /* no output registers */
+ : "r" (dst), "r" (dstPitch), "r" (src), "r" (height)
+ : "r0", "%0", "%2", "%3");
+}
+
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-12 09:26:34 +0000