mirror of https://github.com/encounter/SDL.git
Support proper mode switching on RISC OS
This commit is contained in:
Cameron Cawley
Sam Lantinga
parent
fe9bb74764
commit
f8a8ca3e1f
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@ -97,8 +97,8 @@ int RISCOS_UpdateWindowFramebuffer(_THIS, SDL_Window * window, const SDL_Rect *
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regs.r[0] = 512+52;
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regs.r[1] = (int)driverdata->fb_area;
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regs.r[2] = (int)driverdata->fb_sprite;
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regs.r[3] = window->x << 1;
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regs.r[4] = window->y << 1;
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regs.r[3] = 0; /* window->x << 1; */
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regs.r[4] = 0; /* window->y << 1; */
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regs.r[5] = 0x50;
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regs.r[6] = 0;
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regs.r[7] = 0;
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@ -0,0 +1,255 @@
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_RISCOS
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#include "../SDL_sysvideo.h"
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#include "SDL_riscosvideo.h"
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#include "SDL_riscosmodes.h"
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#include <kernel.h>
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#include <swis.h>
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enum {
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MODE_FLAG_565 = 1 << 7,
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MODE_FLAG_COLOUR_SPACE = 0xF << 12,
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MODE_FLAG_TBGR = 0,
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MODE_FLAG_TRGB = 1 << 14,
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MODE_FLAG_ABGR = 1 << 15,
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MODE_FLAG_ARGB = MODE_FLAG_TRGB | MODE_FLAG_ABGR
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};
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static const struct {
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SDL_PixelFormatEnum pixel_format;
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int modeflags, ncolour, log2bpp;
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} mode_to_pixelformat[] = {
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/* { SDL_PIXELFORMAT_INDEX1LSB, 0, 1, 0 }, */
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/* { SDL_PIXELFORMAT_INDEX2LSB, 0, 3, 1 }, */
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/* { SDL_PIXELFORMAT_INDEX4LSB, 0, 15, 2 }, */
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/* { SDL_PIXELFORMAT_INDEX8, MODE_FLAG_565, 255, 3 }, */
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{ SDL_PIXELFORMAT_XBGR1555, MODE_FLAG_TBGR, 65535, 4 },
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{ SDL_PIXELFORMAT_XRGB1555, MODE_FLAG_TRGB, 65535, 4 },
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{ SDL_PIXELFORMAT_ABGR1555, MODE_FLAG_ABGR, 65535, 4 },
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{ SDL_PIXELFORMAT_ARGB1555, MODE_FLAG_ARGB, 65535, 4 },
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{ SDL_PIXELFORMAT_XBGR4444, MODE_FLAG_TBGR, 4095, 4 },
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{ SDL_PIXELFORMAT_XRGB4444, MODE_FLAG_TRGB, 4095, 4 },
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{ SDL_PIXELFORMAT_ABGR4444, MODE_FLAG_ABGR, 4095, 4 },
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{ SDL_PIXELFORMAT_ARGB4444, MODE_FLAG_ARGB, 4095, 4 },
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{ SDL_PIXELFORMAT_BGR565, MODE_FLAG_TBGR | MODE_FLAG_565, 65535, 4 },
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{ SDL_PIXELFORMAT_RGB565, MODE_FLAG_TRGB | MODE_FLAG_565, 65535, 4 },
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{ SDL_PIXELFORMAT_BGR24, MODE_FLAG_TBGR, 16777215, 6 },
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{ SDL_PIXELFORMAT_RGB24, MODE_FLAG_TRGB, 16777215, 6 },
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{ SDL_PIXELFORMAT_XBGR8888, MODE_FLAG_TBGR, -1, 5 },
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{ SDL_PIXELFORMAT_XRGB8888, MODE_FLAG_TRGB, -1, 5 },
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{ SDL_PIXELFORMAT_ABGR8888, MODE_FLAG_ABGR, -1, 5 },
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{ SDL_PIXELFORMAT_ARGB8888, MODE_FLAG_ARGB, -1, 5 }
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};
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static SDL_PixelFormatEnum
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RISCOS_ModeToPixelFormat(int ncolour, int modeflags, int log2bpp)
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{
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int i;
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for (i = 0; i < SDL_arraysize(mode_to_pixelformat); i++) {
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if (log2bpp == mode_to_pixelformat[i].log2bpp &&
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(ncolour == mode_to_pixelformat[i].ncolour || ncolour == 0) &&
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(modeflags & (MODE_FLAG_565 | MODE_FLAG_COLOUR_SPACE)) == mode_to_pixelformat[i].modeflags) {
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return mode_to_pixelformat[i].pixel_format;
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}
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}
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return SDL_PIXELFORMAT_UNKNOWN;
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}
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static size_t
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measure_mode_block(const int *block)
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{
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size_t blockSize = (block[0] == 2) ? 7 : 5;
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while(block[blockSize] != -1) {
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blockSize += 2;
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}
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blockSize++;
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return blockSize * 4;
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}
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static int *
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read_mode_block(int *block, SDL_DisplayMode *mode)
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{
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int xres, yres, ncolour, modeflags, log2bpp, rate;
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int *end;
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xres = block[1];
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yres = block[2];
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if ((block[0] & 0xFF) == 1) {
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log2bpp = block[3];
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rate = block[4];
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end = block + 5;
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ncolour = (1 << (1 << log2bpp)) - 1;
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modeflags = MODE_FLAG_TBGR;
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} else if ((block[0] & 0xFF) == 3) {
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ncolour = block[3];
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modeflags = block[4];
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log2bpp = block[5];
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rate = block[6];
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end = block + 7;
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} else {
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return NULL;
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}
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mode->w = xres;
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mode->h = yres;
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mode->format = RISCOS_ModeToPixelFormat(ncolour, modeflags, log2bpp);
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mode->refresh_rate = rate;
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return end;
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}
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static void *
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copy_memory(const void *src, size_t size, size_t alloc)
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{
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void *dst = SDL_malloc(alloc);
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if (dst) {
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SDL_memcpy(dst, src, size);
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}
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return dst;
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}
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int
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RISCOS_InitModes(_THIS)
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{
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SDL_DisplayMode mode;
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int *current_mode;
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_kernel_swi_regs regs;
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_kernel_oserror *error;
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size_t size;
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regs.r[0] = 1;
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error = _kernel_swi(OS_ScreenMode, ®s, ®s);
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if (error != NULL) {
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return SDL_SetError("Unable to retrieve the current screen mode: %s (%i)", error->errmess, error->errnum);
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}
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current_mode = (int *)regs.r[1];
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if (!read_mode_block(current_mode, &mode)) {
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return SDL_SetError("Unsupported mode block format %d", current_mode[0]);
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}
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size = measure_mode_block(current_mode);
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mode.driverdata = copy_memory(current_mode, size, size);
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if (!mode.driverdata) {
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return SDL_OutOfMemory();
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}
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return SDL_AddBasicVideoDisplay(&mode);
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}
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void
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RISCOS_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
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{
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SDL_DisplayMode mode;
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_kernel_swi_regs regs;
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_kernel_oserror *error;
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void *block, *pos;
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regs.r[0] = 2;
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regs.r[2] = 0;
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regs.r[6] = 0;
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regs.r[7] = 0;
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error = _kernel_swi(OS_ScreenMode, ®s, ®s);
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if (error != NULL) {
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SDL_SetError("Unable to enumerate screen modes: %s (%i)", error->errmess, error->errnum);
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return;
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}
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block = SDL_malloc(-regs.r[7]);
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if (!block) {
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SDL_OutOfMemory();
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return;
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}
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regs.r[6] = (int)block;
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regs.r[7] = -regs.r[7];
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error = _kernel_swi(OS_ScreenMode, ®s, ®s);
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if (error != NULL) {
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SDL_free(block);
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SDL_SetError("Unable to enumerate screen modes: %s (%i)", error->errmess, error->errnum);
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return;
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}
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for (pos = block; pos < (void *)regs.r[6]; pos += *((int *)pos)) {
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size_t size;
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void *end;
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end = read_mode_block(pos + 4, &mode);
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if (!end) {
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continue;
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}
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if (mode.format == SDL_PIXELFORMAT_UNKNOWN)
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continue;
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size = (end - pos) - 4;
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mode.driverdata = copy_memory(pos + 4, size, size + 4);
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if (!mode.driverdata) {
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SDL_OutOfMemory();
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break;
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}
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*((int *)(mode.driverdata + size)) = -1;
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if (!SDL_AddDisplayMode(display, &mode)) {
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SDL_free(mode.driverdata);
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}
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}
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SDL_free(block);
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}
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int
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RISCOS_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
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{
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const char disable_cursor[] = { 23, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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_kernel_swi_regs regs;
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_kernel_oserror *error;
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int i;
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regs.r[0] = 0;
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regs.r[1] = (int)mode->driverdata;
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error = _kernel_swi(OS_ScreenMode, ®s, ®s);
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if (error != NULL) {
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return SDL_SetError("Unable to set the current screen mode: %s (%i)", error->errmess, error->errnum);
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}
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/* Turn the text cursor off */
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for (i = 0; i < SDL_arraysize(disable_cursor); i++) {
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_kernel_oswrch(disable_cursor[i]);
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}
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return 0;
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}
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#endif /* SDL_VIDEO_DRIVER_RISCOS */
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/* vi: set ts=4 sw=4 expandtab: */
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@ -0,0 +1,33 @@
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#ifndef SDL_riscosmodes_h_
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#define SDL_riscosmodes_h_
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extern int RISCOS_InitModes(_THIS);
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extern void RISCOS_GetDisplayModes(_THIS, SDL_VideoDisplay * display);
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extern int RISCOS_SetDisplayMode(_THIS, SDL_VideoDisplay * display,
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SDL_DisplayMode * mode);
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#endif /* SDL_riscosmodes_h_ */
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/* vi: set ts=4 sw=4 expandtab: */
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@ -22,21 +22,6 @@
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#if SDL_VIDEO_DRIVER_RISCOS
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/* Dummy SDL video driver implementation; this is just enough to make an
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* SDL-based application THINK it's got a working video driver, for
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* applications that call SDL_Init(SDL_INIT_VIDEO) when they don't need it,
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* and also for use as a collection of stubs when porting SDL to a new
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* platform for which you haven't yet written a valid video driver.
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*
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* This is also a great way to determine bottlenecks: if you think that SDL
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* is a performance problem for a given platform, enable this driver, and
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* then see if your application runs faster without video overhead.
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*
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* Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
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* of this was cut-and-pasted from Stephane Peter's work in the AAlib
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* SDL video driver. Renamed to "DUMMY" by Sam Lantinga.
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*/
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#include "SDL_video.h"
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#include "SDL_mouse.h"
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#include "../SDL_sysvideo.h"
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@ -46,16 +31,13 @@
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#include "SDL_riscosvideo.h"
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#include "SDL_riscosevents_c.h"
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#include "SDL_riscosframebuffer_c.h"
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#include "SDL_riscosmodes.h"
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#include "SDL_riscoswindow.h"
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#include <kernel.h>
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#include <swis.h>
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#define RISCOSVID_DRIVER_NAME "riscos"
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/* Initialization/Query functions */
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static int RISCOS_VideoInit(_THIS);
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static int RISCOS_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode);
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static void RISCOS_VideoQuit(_THIS);
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/* RISC OS driver bootstrap functions */
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@ -81,9 +63,11 @@ RISCOS_CreateDevice(int devindex)
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/* Set the function pointers */
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device->VideoInit = RISCOS_VideoInit;
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device->VideoQuit = RISCOS_VideoQuit;
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device->SetDisplayMode = RISCOS_SetDisplayMode;
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device->PumpEvents = RISCOS_PumpEvents;
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device->GetDisplayModes = RISCOS_GetDisplayModes;
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device->SetDisplayMode = RISCOS_SetDisplayMode;
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device->CreateSDLWindow = RISCOS_CreateWindow;
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device->DestroyWindow = RISCOS_DestroyWindow;
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device->GetWindowWMInfo = RISCOS_GetWindowWMInfo;
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@ -102,134 +86,18 @@ VideoBootStrap RISCOS_bootstrap = {
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RISCOS_CreateDevice
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};
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enum {
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MODE_FLAG_565 = 1 << 7,
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MODE_FLAG_COLOUR_SPACE = 0xF << 12,
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MODE_FLAG_TBGR = 0,
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MODE_FLAG_TRGB = 1 << 14,
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MODE_FLAG_ABGR = 1 << 15,
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MODE_FLAG_ARGB = MODE_FLAG_TRGB | MODE_FLAG_ABGR
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};
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#define MODE_350(type, xdpi, ydpi) \
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(1 | (xdpi << 1) | (ydpi << 14) | (type << 27))
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#define MODE_521(type, xeig, yeig, flags) \
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(0x78000001 | (xeig << 4) | (yeig << 6) | (flags & 0xFF00) | (type << 20))
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static const struct {
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SDL_PixelFormatEnum pixel_format;
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int modeflags, ncolour, log2bpp, sprite_type;
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} mode_to_pixelformat[] = {
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{ SDL_PIXELFORMAT_INDEX1LSB, 0, 1, 0, 1 },
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/* { SDL_PIXELFORMAT_INDEX2LSB, 0, 3, 1, 2 }, */
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{ SDL_PIXELFORMAT_INDEX4LSB, 0, 15, 2, 3 },
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{ SDL_PIXELFORMAT_INDEX8, MODE_FLAG_565, 255, 3, 4 },
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{ SDL_PIXELFORMAT_BGR555, MODE_FLAG_TBGR, 65535, 4, 5 },
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{ SDL_PIXELFORMAT_RGB555, MODE_FLAG_TRGB, 65535, 4, 5 },
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{ SDL_PIXELFORMAT_ABGR1555, MODE_FLAG_ABGR, 65535, 4, 5 },
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{ SDL_PIXELFORMAT_ARGB1555, MODE_FLAG_ARGB, 65535, 4, 5 },
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{ SDL_PIXELFORMAT_BGR444, MODE_FLAG_TBGR, 4095, 4, 16 },
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{ SDL_PIXELFORMAT_RGB444, MODE_FLAG_TRGB, 4095, 4, 16 },
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{ SDL_PIXELFORMAT_ABGR4444, MODE_FLAG_ABGR, 4095, 4, 16 },
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{ SDL_PIXELFORMAT_ARGB4444, MODE_FLAG_ARGB, 4095, 4, 16 },
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{ SDL_PIXELFORMAT_BGR565, MODE_FLAG_TBGR | MODE_FLAG_565, 65535, 4, 10 },
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{ SDL_PIXELFORMAT_RGB565, MODE_FLAG_TRGB | MODE_FLAG_565, 65535, 4, 10 },
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{ SDL_PIXELFORMAT_BGR24, MODE_FLAG_TBGR, 16777215, 6, 8 },
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{ SDL_PIXELFORMAT_RGB24, MODE_FLAG_TRGB, 16777215, 6, 8 },
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{ SDL_PIXELFORMAT_BGR888, MODE_FLAG_TBGR, -1, 5, 6 },
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{ SDL_PIXELFORMAT_RGB888, MODE_FLAG_TRGB, -1, 5, 6 },
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{ SDL_PIXELFORMAT_ABGR8888, MODE_FLAG_ABGR, -1, 5, 6 },
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{ SDL_PIXELFORMAT_ARGB8888, MODE_FLAG_ARGB, -1, 5, 6 }
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};
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static int ReadModeVariable(int mode, int variable) {
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_kernel_swi_regs regs;
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regs.r[0] = mode;
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regs.r[1] = variable;
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_kernel_swi(OS_ReadModeVariable, ®s, ®s);
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return regs.r[2];
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}
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SDL_PixelFormatEnum RISCOS_ModeToPixelFormat(int *mode) {
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int i, log2bpp, ncolour, modeflags;
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log2bpp = ReadModeVariable((int)mode, 9);
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ncolour = ReadModeVariable((int)mode, 3);
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modeflags = ReadModeVariable((int)mode, 0);
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for (i = 0; i < SDL_arraysize(mode_to_pixelformat); i++) {
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if (log2bpp == mode_to_pixelformat[i].log2bpp &&
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(ncolour == mode_to_pixelformat[i].ncolour || ncolour == 0) &&
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(modeflags & (MODE_FLAG_565 | MODE_FLAG_COLOUR_SPACE)) == mode_to_pixelformat[i].modeflags) {
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return mode_to_pixelformat[i].pixel_format;
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}
|
||||
}
|
||||
|
||||
return SDL_PIXELFORMAT_UNKNOWN;
|
||||
}
|
||||
|
||||
static void *copy_mode_block(int *storeBlock)
|
||||
{
|
||||
int *outBlock;
|
||||
int blockSize = (storeBlock[0] == 2) ? 7 : 5;
|
||||
while(storeBlock[blockSize] != -1) {
|
||||
blockSize += 2;
|
||||
}
|
||||
blockSize++;
|
||||
|
||||
outBlock = SDL_calloc(sizeof(int), blockSize);
|
||||
SDL_memcpy(outBlock, storeBlock, sizeof(int) * blockSize);
|
||||
return outBlock;
|
||||
}
|
||||
|
||||
int
|
||||
static int
|
||||
RISCOS_VideoInit(_THIS)
|
||||
{
|
||||
SDL_DisplayMode mode;
|
||||
int *current_mode;
|
||||
_kernel_swi_regs regs;
|
||||
_kernel_oserror *error;
|
||||
|
||||
regs.r[0] = 1;
|
||||
error = _kernel_swi(OS_ScreenMode, ®s, ®s);
|
||||
if (error != NULL) {
|
||||
SDL_SetError("Unable to retrieve the current screen mode: %s (%i)", error->errmess, error->errnum);
|
||||
if (RISCOS_InitModes(_this) < 0) {
|
||||
return -1;
|
||||
}
|
||||
current_mode = (int *)regs.r[1];
|
||||
|
||||
/* Use a fake 32-bpp desktop mode */
|
||||
mode.w = current_mode[1];
|
||||
mode.h = current_mode[2];
|
||||
if ((current_mode[0] & 0x7F) == 1) {
|
||||
mode.format = RISCOS_ModeToPixelFormat(current_mode);
|
||||
mode.refresh_rate = current_mode[4];
|
||||
} else if ((current_mode[0] & 0x7F) == 3) {
|
||||
mode.format = RISCOS_ModeToPixelFormat(current_mode);
|
||||
mode.refresh_rate = current_mode[6];
|
||||
} else {
|
||||
return -1;
|
||||
}
|
||||
mode.driverdata = copy_mode_block(current_mode);
|
||||
|
||||
if (SDL_AddBasicVideoDisplay(&mode) < 0) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
SDL_AddDisplayMode(&_this->displays[0], &mode);
|
||||
|
||||
/* We're done! */
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
RISCOS_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
static void
|
||||
RISCOS_VideoQuit(_THIS)
|
||||
{
|
||||
}
|
||||
|
|
|
|||
|
|
@ -40,6 +40,8 @@ RISCOS_CreateWindow(_THIS, SDL_Window * window)
|
|||
}
|
||||
driverdata->window = window;
|
||||
|
||||
window->flags |= SDL_WINDOW_FULLSCREEN;
|
||||
|
||||
/* All done! */
|
||||
window->driverdata = driverdata;
|
||||
return 0;
|
||||
|
|
|
|||
Loading…
Reference in New Issue