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-rw-r--r--distrib/sdl-1.2.15/src/video/riscos/SDL_riscossprite.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/video/riscos/SDL_riscossprite.c b/distrib/sdl-1.2.15/src/video/riscos/SDL_riscossprite.c
new file mode 100644
index 0000000..70b2f91
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/video/riscos/SDL_riscossprite.c
@@ -0,0 +1,265 @@
+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2012 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);
+}
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