[sdl_omap.git] / src / video / riscos / SDL_riscossprite.c

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

/*
     File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability
	 27 March 2003

     Implements Sprite plotting code for wimp display.window
*/

#include "kernel.h"
#include "swis.h"

#include "SDL_stdinc.h"
#include "SDL_riscosvideo.h"

extern void WIMP_ReadModeInfo(_THIS);

void WIMP_PaletteChanged(_THIS);


/* Create sprite buffer for screen */

unsigned char *WIMP_CreateBuffer(int width, int height, int bpp)
{
	int size;
	char sprite_name[12] = "display";
	unsigned char *buffer;
	_kernel_swi_regs regs;
	int bytesPerPixel;
	int bytesPerRow;
	int offsetToSpriteData = 60;

	switch(bpp)
	{
	case 32: bytesPerPixel = 4; break;
	case 16: bytesPerPixel = 2; break;
	case 8:
	    bytesPerPixel = 1;
	    offsetToSpriteData += 2048; /* Add in size of palette */
	    break;
	default:
		return NULL;
		break;
	}

	bytesPerRow = bytesPerPixel * width;

	if ((bytesPerRow & 3) != 0)
	{
		bytesPerRow += 4 - (bytesPerRow & 3);
	}
	size = bytesPerRow * height;

	buffer = SDL_malloc( (size_t) size + offsetToSpriteData );
	if (!buffer) return NULL;

   /* Initialise a sprite area */

	*(unsigned int *)buffer		= size + offsetToSpriteData;
	*(unsigned int *)(buffer + 8)	= 16;

	regs.r[0] = 256+9;
	regs.r[1] = (unsigned int)buffer;
   _kernel_swi(OS_SpriteOp, &regs, &regs);

	regs.r[0] = 256+15;
	regs.r[1] = (unsigned int)buffer;
	regs.r[2] = (unsigned int)&sprite_name;
	regs.r[3] = 0; /* Palette flag: 0 = no palette */
	regs.r[4] = width;
	regs.r[5] = height;
	if (bpp == 8)
	{
		/* Use old style mode number */
		regs.r[6] = 28; /* 8bpp 90x90dpi */
	} else
	{
		regs.r[6] = (((bpp == 16) ? 5 : 6) << 27) /* Type 6 = 32bpp sprite, 5 = 16bpp sprite */
					| (90 << 14) /* Vertical dpi */
					| (90 << 1)  /* Horizontal dpi */
					| 1; /* Marker to distinguish between mode selectors and sprite modes */
	}
   if (_kernel_swi(OS_SpriteOp, &regs, &regs) == NULL)
   {
       if (bpp == 8)
       {
          /* Modify sprite to take into account 256 colour palette */
          int *sprite = (int *)(buffer + 16);
          /* Adjust sprite offsets */
          sprite[0] += 2048;
          sprite[8] += 2048;
          sprite[9] += 2048;
          /* Adjust sprite area next free pointer */
          (*(int *)(buffer+12)) += 2048;

          /* Don't need to set up palette as SDL sets up the default
             256 colour palette */
/*          {
             int *pal = sprite + 11;
             unsigned int j;
             unsigned int entry;
             for (j = 0; j < 255; j++)
             {
                entry = (j << 24) | (j << 16) | (j << 8);
                *pal++ = entry;
                *pal++ = entry;
             }
          }
*/
       }
   } else
   {
      SDL_free(buffer);
      buffer = NULL;
   }

   return buffer;
}


/* Setup translation buffers for the sprite plotting */

void WIMP_SetupPlotInfo(_THIS)
{
   _kernel_swi_regs regs;
   int *sprite = ((int *)this->hidden->bank[1])+4;

   regs.r[0] = (unsigned int)this->hidden->bank[1];
   regs.r[1] = (unsigned int)sprite;
   regs.r[2] = -1; /* Current mode */
   regs.r[3] = -1; /* Current palette */
   regs.r[4] = 0; /* Get size of buffer */
   regs.r[5] = 1|2|16; /* R1 - pointer to sprite and can use full palette words */
   regs.r[6] = 0;
   regs.r[7] = 0;

   if (this->hidden->pixtrans) SDL_free(this->hidden->pixtrans);
   this->hidden->pixtrans = 0;

   /* Get the size required for the buffer */
   _kernel_swi(ColourTrans_GenerateTable, &regs, &regs);
   if (regs.r[4])
   {
      this->hidden->pixtrans = SDL_malloc(regs.r[4]);
    
      regs.r[4] = (unsigned int)this->hidden->pixtrans;
      /* Actually read the buffer */
      _kernel_swi(ColourTrans_GenerateTable, &regs, &regs);
   }
}

/* Plot the sprite in the given context */
void WIMP_PlotSprite(_THIS, int x, int y)
{
   _kernel_swi_regs regs;
   _kernel_oserror *err;

   regs.r[0] =  52 + 512;
   regs.r[1] = (unsigned int)this->hidden->bank[1];
   regs.r[2] = (unsigned int)this->hidden->bank[1]+16;
   regs.r[3] = x;
   regs.r[4] = y;
   regs.r[5] = 0|32; /* Overwrite screen and pixtrans contains wide colour entries */
   regs.r[6] = 0; /* No scale factors i.e. 1:1 */
   regs.r[7] = (int)this->hidden->pixtrans;

   if ((err = _kernel_swi(OS_SpriteOp, &regs, &regs)) != 0)
   {
      int *p = (int *)this->hidden->pixtrans;
      printf("OS_SpriteOp failed \n%s\n",err->errmess);
      printf("pixtrans %d\n", (int)this->hidden->pixtrans);
      printf("%x %x %x\n", p[0], p[1], p[2]);
   }
}


/* Wimp mode has changes so update colour mapping and pixel sizes 
   of windows and the sprites they plot */

void WIMP_ModeChanged(_THIS)
{
	int oldXeig = this->hidden->xeig;
	int oldYeig = this->hidden->yeig;

	WIMP_ReadModeInfo(this);

	if (oldXeig == this->hidden->xeig && oldYeig == this->hidden->yeig)
	{
		/* Only need to update the palette */
		WIMP_PaletteChanged(this);
	} else
	{
		_kernel_swi_regs regs;
		int window_state[9];
		int extent[4];
		int currWidth, currHeight;
		int newWidth, newHeight;
		
		/* Need to resize windows and update the palette */
		WIMP_SetupPlotInfo(this);


		window_state[0] = this->hidden->window_handle;
		regs.r[1] = (unsigned int)window_state;
		_kernel_swi(Wimp_GetWindowState, &regs, &regs);
						
		currWidth = window_state[3] - window_state[1];
		currHeight = window_state[4] - window_state[2];
		
		newWidth = (currWidth >> oldXeig) << this->hidden->xeig;
		newHeight = (currHeight >> oldYeig) << this->hidden->yeig;
		/* Need to avoid extent getting too small for visible part
		of window */
		extent[0] = 0;
		if (currHeight <= newHeight)
		{
			extent[1] = -newHeight;
		} else
		{
			extent[1] = -currHeight;
		}
		if (currWidth <= newWidth)
		{
			extent[2] = newWidth;
		} else
		{
			extent[2] = currWidth;
		}
		extent[3] = 0;
		
		regs.r[0] = this->hidden->window_handle;
		regs.r[1] = (int)extent;
		_kernel_swi(Wimp_SetExtent, &regs, &regs);

		/*TODO: May need to set flag to resize window on next open */
	}
}

/* Palette has changed so update palettes used for windows sprites */

void WIMP_PaletteChanged(_THIS)
{
	WIMP_SetupPlotInfo(this);
}
Commit	Line	Data
e14743d1	1	/*
	2	SDL - Simple DirectMedia Layer
	3	Copyright (C) 1997-2009 Sam Lantinga
	4
	5	This library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Library General Public
	7	License as published by the Free Software Foundation; either
	8	version 2 of the License, or (at your option) any later version.
	9
	10	This library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Library General Public License for more details.
	14
	15	You should have received a copy of the GNU Library General Public
	16	License along with this library; if not, write to the Free
	17	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18
	19	Sam Lantinga
	20	slouken@libsdl.org
	21	*/
	22	#include "SDL_config.h"
	23
	24	/*
	25	File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability
	26	27 March 2003
	27
	28	Implements Sprite plotting code for wimp display.window
	29	*/
	30
	31	#include "kernel.h"
	32	#include "swis.h"
	33
	34	#include "SDL_stdinc.h"
	35	#include "SDL_riscosvideo.h"
	36
	37	extern void WIMP_ReadModeInfo(_THIS);
	38
	39	void WIMP_PaletteChanged(_THIS);
	40
	41
	42	/* Create sprite buffer for screen */
	43
	44	unsigned char *WIMP_CreateBuffer(int width, int height, int bpp)
	45	{
	46	int size;
	47	char sprite_name[12] = "display";
	48	unsigned char *buffer;
	49	_kernel_swi_regs regs;
	50	int bytesPerPixel;
	51	int bytesPerRow;
	52	int offsetToSpriteData = 60;
	53
	54	switch(bpp)
	55	{
	56	case 32: bytesPerPixel = 4; break;
	57	case 16: bytesPerPixel = 2; break;
	58	case 8:
	59	bytesPerPixel = 1;
	60	offsetToSpriteData += 2048; /* Add in size of palette */
	61	break;
	62	default:
	63	return NULL;
	64	break;
65	}
66
67	bytesPerRow = bytesPerPixel * width;
68
69	if ((bytesPerRow & 3) != 0)
70	{
71	bytesPerRow += 4 - (bytesPerRow & 3);
72	}
73	size = bytesPerRow * height;
74
75	buffer = SDL_malloc( (size_t) size + offsetToSpriteData );
76	if (!buffer) return NULL;
77
78	/* Initialise a sprite area */
79
80	(unsigned int )buffer = size + offsetToSpriteData;
81	(unsigned int )(buffer + 8) = 16;
82
83	regs.r[0] = 256+9;
84	regs.r[1] = (unsigned int)buffer;
85	_kernel_swi(OS_SpriteOp, &regs, &regs);
86
87	regs.r[0] = 256+15;
88	regs.r[1] = (unsigned int)buffer;
89	regs.r[2] = (unsigned int)&sprite_name;
90	regs.r[3] = 0; /* Palette flag: 0 = no palette */
91	regs.r[4] = width;
92	regs.r[5] = height;
93	if (bpp == 8)
94	{
95	/* Use old style mode number */
96	regs.r[6] = 28; /* 8bpp 90x90dpi */
97	} else
98	{
99	regs.r[6] = (((bpp == 16) ? 5 : 6) << 27) /* Type 6 = 32bpp sprite, 5 = 16bpp sprite */
100	\| (90 << 14) /* Vertical dpi */
101	\| (90 << 1) /* Horizontal dpi */
102	\| 1; /* Marker to distinguish between mode selectors and sprite modes */
103	}
104	if (_kernel_swi(OS_SpriteOp, &regs, &regs) == NULL)
105	{
106	if (bpp == 8)
107	{
108	/* Modify sprite to take into account 256 colour palette */
109	int sprite = (int )(buffer + 16);
110	/* Adjust sprite offsets */
111	sprite[0] += 2048;
112	sprite[8] += 2048;
113	sprite[9] += 2048;
114	/* Adjust sprite area next free pointer */
115	((int )(buffer+12)) += 2048;
116
117	/* Don't need to set up palette as SDL sets up the default
118	256 colour palette */
119	/* {
120	int *pal = sprite + 11;
121	unsigned int j;
122	unsigned int entry;
123	for (j = 0; j < 255; j++)
124	{
125	entry = (j << 24) \| (j << 16) \| (j << 8);
126	*pal++ = entry;
127	*pal++ = entry;
128	}
129	}
130	*/
131	}
132	} else
133	{
134	SDL_free(buffer);
135	buffer = NULL;
136	}
137
138	return buffer;
139	}
140
141
142	/* Setup translation buffers for the sprite plotting */
143
144	void WIMP_SetupPlotInfo(_THIS)
145	{
146	_kernel_swi_regs regs;
147	int sprite = ((int )this->hidden->bank[1])+4;
148
149	regs.r[0] = (unsigned int)this->hidden->bank[1];
150	regs.r[1] = (unsigned int)sprite;
151	regs.r[2] = -1; /* Current mode */
152	regs.r[3] = -1; /* Current palette */
153	regs.r[4] = 0; /* Get size of buffer */
154	regs.r[5] = 1\|2\|16; /* R1 - pointer to sprite and can use full palette words */
155	regs.r[6] = 0;
156	regs.r[7] = 0;
157
158	if (this->hidden->pixtrans) SDL_free(this->hidden->pixtrans);
159	this->hidden->pixtrans = 0;
160
161	/* Get the size required for the buffer */
162	_kernel_swi(ColourTrans_GenerateTable, &regs, &regs);
163	if (regs.r[4])
164	{
165	this->hidden->pixtrans = SDL_malloc(regs.r[4]);
166
167	regs.r[4] = (unsigned int)this->hidden->pixtrans;
168	/* Actually read the buffer */
169	_kernel_swi(ColourTrans_GenerateTable, &regs, &regs);
170	}
171	}
172
173	/* Plot the sprite in the given context */
174	void WIMP_PlotSprite(_THIS, int x, int y)
175	{
176	_kernel_swi_regs regs;
177	_kernel_oserror *err;
178
179	regs.r[0] = 52 + 512;
180	regs.r[1] = (unsigned int)this->hidden->bank[1];
181	regs.r[2] = (unsigned int)this->hidden->bank[1]+16;
182	regs.r[3] = x;
183	regs.r[4] = y;
184	regs.r[5] = 0\|32; /* Overwrite screen and pixtrans contains wide colour entries */
185	regs.r[6] = 0; /* No scale factors i.e. 1:1 */
186	regs.r[7] = (int)this->hidden->pixtrans;
187
188	if ((err = _kernel_swi(OS_SpriteOp, &regs, &regs)) != 0)
189	{
190	int p = (int )this->hidden->pixtrans;
191	printf("OS_SpriteOp failed \n%s\n",err->errmess);
192	printf("pixtrans %d\n", (int)this->hidden->pixtrans);
193	printf("%x %x %x\n", p[0], p[1], p[2]);
194	}
195	}
196
197
198	/* Wimp mode has changes so update colour mapping and pixel sizes
199	of windows and the sprites they plot */
200
201	void WIMP_ModeChanged(_THIS)
202	{
203	int oldXeig = this->hidden->xeig;
204	int oldYeig = this->hidden->yeig;
205
206	WIMP_ReadModeInfo(this);
207
208	if (oldXeig == this->hidden->xeig && oldYeig == this->hidden->yeig)
209	{
210	/* Only need to update the palette */
211	WIMP_PaletteChanged(this);
212	} else
213	{
214	_kernel_swi_regs regs;
215	int window_state[9];
216	int extent[4];
217	int currWidth, currHeight;
218	int newWidth, newHeight;
219
220	/* Need to resize windows and update the palette */
221	WIMP_SetupPlotInfo(this);
222
223
224	window_state[0] = this->hidden->window_handle;
225	regs.r[1] = (unsigned int)window_state;
226	_kernel_swi(Wimp_GetWindowState, &regs, &regs);
227
228	currWidth = window_state[3] - window_state[1];
229	currHeight = window_state[4] - window_state[2];
230
231	newWidth = (currWidth >> oldXeig) << this->hidden->xeig;
232	newHeight = (currHeight >> oldYeig) << this->hidden->yeig;
233	/* Need to avoid extent getting too small for visible part
234	of window */
235	extent[0] = 0;
236	if (currHeight <= newHeight)
237	{
238	extent[1] = -newHeight;
239	} else
240	{
241	extent[1] = -currHeight;
242	}
243	if (currWidth <= newWidth)
244	{
245	extent[2] = newWidth;
246	} else
247	{
248	extent[2] = currWidth;
249	}
250	extent[3] = 0;
251
252	regs.r[0] = this->hidden->window_handle;
253	regs.r[1] = (int)extent;
254	_kernel_swi(Wimp_SetExtent, &regs, &regs);
255
256	/TODO: May need to set flag to resize window on next open /
257	}
258	}
259
260	/* Palette has changed so update palettes used for windows sprites */
261
262	void WIMP_PaletteChanged(_THIS)
263	{
264	WIMP_SetupPlotInfo(this);
265	}