Initial commit

backends/platform/dc/label.cpp

@@ -0,0 +1,135 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <ronin/ronin.h>
+#include <string.h>
+
+#include "label.h"
+
+
+void *get_romfont_address() __asm__(".get_romfont_address");
+__asm__("\
+			\n\
+.get_romfont_address:	\n\
+	mov.l 1f,r0		\n\
+	mov.l @r0,r0	\n\
+	jmp @r0		\n\
+	mov #0,r1		\n\
+	.align 2		\n\
+1:  .long 0x8c0000b4	\n\
+			\n\
+");
+
+
+static void draw_char(unsigned short *dst, int mod, int c, void *font_base)
+{
+  unsigned char *src;
+  int i, j;
+  if (c<=32 || c>255 || (c>=127 && c<160)) c=160;
+  if (c<128) c -= 32; else c -= 64;
+  src = c*36 + (unsigned char *)font_base;
+  for (i=0; i<12; i++) {
+	int n = (src[0]<<16)|(src[1]<<8)|src[2];
+	for (j=0; j<12; j++, n<<=1)
+	  if (n & (1<<23)) {
+	dst[j] = 0xffff;
+	dst[j+1] = 0xffff;
+	dst[j+2] = 0xa108;
+	dst[j+mod] = 0xa108;
+	dst[j+mod+1] = 0xa108;
+	  }
+	dst += mod;
+	for (j=0; j<12; j++, n<<=1)
+	  if (n & (1<<23)) {
+	dst[j] = 0xffff;
+	dst[j+1] = 0xffff;
+	dst[j+2] = 0xa108;
+	dst[j+mod] = 0xa108;
+	dst[j+mod+1] = 0xa108;
+	  }
+	dst += mod;
+	src += 3;
+  }
+}
+
+void Label::create_texture(const char *text)
+{
+  void *font = get_romfont_address();
+  int l = strlen(text);
+  if (l>64) l=64;
+  int w = 14*l;
+  for (tex_u=TA_POLYMODE2_U_SIZE_8, u=8; u<w; u<<=1, tex_u += 1<<3);
+  int tsz = u*32;
+  unsigned short *tex = (unsigned short *)ta_txalloc(tsz*2);
+  for (int i=0; i<tsz; i++)
+	tex[i] = 0;
+  int p=l*14;
+  while (l>0)
+	draw_char(tex+(p-=14), u, text[--l], font);
+  texture = tex;
+}
+
+void Label::draw(float x, float y, unsigned int argb, float scale)
+{
+  struct polygon_list mypoly;
+  struct packed_colour_vertex_list myvertex;
+
+  mypoly.cmd =
+	TA_CMD_POLYGON|TA_CMD_POLYGON_TYPE_TRANSPARENT|TA_CMD_POLYGON_SUBLIST|
+	TA_CMD_POLYGON_STRIPLENGTH_2|TA_CMD_POLYGON_PACKED_COLOUR|TA_CMD_POLYGON_TEXTURED;
+  mypoly.mode1 = TA_POLYMODE1_Z_ALWAYS|TA_POLYMODE1_NO_Z_UPDATE;
+  mypoly.mode2 =
+	TA_POLYMODE2_BLEND_SRC_ALPHA|TA_POLYMODE2_BLEND_DST_INVALPHA|
+	TA_POLYMODE2_FOG_DISABLED|TA_POLYMODE2_ENABLE_ALPHA|
+	TA_POLYMODE2_TEXTURE_MODULATE_ALPHA|TA_POLYMODE2_V_SIZE_32|tex_u;
+  mypoly.texture = TA_TEXTUREMODE_ARGB1555|TA_TEXTUREMODE_NON_TWIDDLED|
+	TA_TEXTUREMODE_ADDRESS(texture);
+
+  mypoly.red = mypoly.green = mypoly.blue = mypoly.alpha = 0;
+
+  ta_commit_list(&mypoly);
+
+  myvertex.cmd = TA_CMD_VERTEX;
+  myvertex.ocolour = 0;
+  myvertex.colour = argb;
+  myvertex.z = 0.5;
+  myvertex.u = 0.0;
+  myvertex.v = 0.0;
+
+  myvertex.x = x;
+  myvertex.y = y;
+  ta_commit_list(&myvertex);
+
+  myvertex.x = x+u*scale;
+  myvertex.u = 1.0;
+  ta_commit_list(&myvertex);
+
+  myvertex.x = x;
+  myvertex.y = y+25.0*scale;
+  myvertex.u = 0.0;
+  myvertex.v = 25.0/32.0;
+  ta_commit_list(&myvertex);
+
+  myvertex.x = x+u*scale;
+  myvertex.u = 1.0;
+  myvertex.cmd |= TA_CMD_VERTEX_EOS;
+  ta_commit_list(&myvertex);
+}