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Add a barebones RISC OS video driver

This commit is contained in:
Cameron Cawley 2020-02-13 21:55:08 +00:00 committed by Sam Lantinga
parent a559864968
commit 25c71748ad
16 changed files with 675 additions and 2 deletions
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7
CMakeLists.txt
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@ -2118,6 +2118,13 @@ elseif(RISCOS)
set(SOURCE_FILES ${SOURCE_FILES} ${MISC_SOURCES})
set(HAVE_SDL_MISC TRUE)
if(SDL_VIDEO)
set(SDL_VIDEO_DRIVER_RISCOS 1)
file(GLOB RISCOSVIDEO_SOURCES ${SDL2_SOURCE_DIR}/src/video/riscos/*.c)
set(SOURCE_FILES ${SOURCE_FILES} ${RISCOSVIDEO_SOURCES})
set(HAVE_SDL_VIDEO TRUE)
endif()
if(SDL_FILESYSTEM)
set(SDL_FILESYSTEM_RISCOS 1)
file(GLOB FILESYSTEM_SOURCES ${SDL2_SOURCE_DIR}/src/filesystem/riscos/*.c)

9
configure vendored
View File

@ -25794,6 +25794,15 @@ $as_echo "#define SDL_TIMER_UNIX 1" >>confdefs.h
SOURCES="$SOURCES $srcdir/src/misc/riscos/*.c"
have_misc=yes
# Set up files for the video library
if test x$enable_video = xyes; then
$as_echo "#define SDL_VIDEO_DRIVER_RISCOS 1" >>confdefs.h
SOURCES="$SOURCES $srcdir/src/video/riscos/*.c"
have_video=yes
SUMMARY_video="${SUMMARY_video} riscos"
fi
# Set up files for the filesystem library
if test x$enable_filesystem = xyes; then

7
configure.ac
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@ -4277,6 +4277,13 @@ case "$host" in
SOURCES="$SOURCES $srcdir/src/misc/riscos/*.c"
have_misc=yes
# Set up files for the video library
if test x$enable_video = xyes; then
AC_DEFINE(SDL_VIDEO_DRIVER_RISCOS, 1, [ ])
SOURCES="$SOURCES $srcdir/src/video/riscos/*.c"
have_video=yes
SUMMARY_video="${SUMMARY_video} riscos"
fi
# Set up files for the filesystem library
if test x$enable_filesystem = xyes; then
AC_DEFINE(SDL_FILESYSTEM_RISCOS, 1, [ ])

1
include/SDL_config.h.cmake
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@ -392,6 +392,7 @@
#cmakedefine SDL_VIDEO_DRIVER_VIVANTE_VDK @SDL_VIDEO_DRIVER_VIVANTE_VDK@
#cmakedefine SDL_VIDEO_DRIVER_OS2 @SDL_VIDEO_DRIVER_OS2@
#cmakedefine SDL_VIDEO_DRIVER_QNX @SDL_VIDEO_DRIVER_QNX@
#cmakedefine SDL_VIDEO_DRIVER_RISCOS @SDL_VIDEO_DRIVER_RISCOS@
#cmakedefine SDL_VIDEO_DRIVER_KMSDRM @SDL_VIDEO_DRIVER_KMSDRM@
#cmakedefine SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC @SDL_VIDEO_DRIVER_KMSDRM_DYNAMIC@

1
include/SDL_config.h.in
View File

@ -401,6 +401,7 @@
#undef SDL_VIDEO_DRIVER_VIVANTE_VDK
#undef SDL_VIDEO_DRIVER_OS2
#undef SDL_VIDEO_DRIVER_QNX
#undef SDL_VIDEO_DRIVER_RISCOS
#undef SDL_VIDEO_RENDER_D3D
#undef SDL_VIDEO_RENDER_D3D11

3
include/SDL_syswm.h
View File

@ -143,7 +143,8 @@ typedef enum
SDL_SYSWM_VIVANTE,
SDL_SYSWM_OS2,
SDL_SYSWM_HAIKU,
SDL_SYSWM_KMSDRM
SDL_SYSWM_KMSDRM,
SDL_SYSWM_RISCOS
} SDL_SYSWM_TYPE;
/**

1
src/video/SDL_sysvideo.h
View File

@ -437,6 +437,7 @@ extern VideoBootStrap UIKIT_bootstrap;
extern VideoBootStrap Android_bootstrap;
extern VideoBootStrap PSP_bootstrap;
extern VideoBootStrap VITA_bootstrap;
extern VideoBootStrap RISCOS_bootstrap;
extern VideoBootStrap RPI_bootstrap;
extern VideoBootStrap KMSDRM_bootstrap;
extern VideoBootStrap KMSDRM_LEGACY_bootstrap;

15
src/video/SDL_video.c
View File

@ -100,6 +100,9 @@ static VideoBootStrap *bootstrap[] = {
#if SDL_VIDEO_DRIVER_KMSDRM
&KMSDRM_bootstrap,
#endif
#if SDL_VIDEO_DRIVER_RISCOS
&RISCOS_bootstrap,
#endif
#if SDL_VIDEO_DRIVER_RPI
&RPI_bootstrap,
#endif
@ -4152,11 +4155,14 @@ SDL_IsScreenKeyboardShown(SDL_Window *window)
#if SDL_VIDEO_DRIVER_OS2
#include "os2/SDL_os2messagebox.h"
#endif
#if SDL_VIDEO_DRIVER_RISCOS
#include "riscos/SDL_riscosmessagebox.h"
#endif
#if SDL_VIDEO_DRIVER_VITA
#include "vita/SDL_vitamessagebox.h"
#endif
#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT || SDL_VIDEO_DRIVER_COCOA || SDL_VIDEO_DRIVER_UIKIT || SDL_VIDEO_DRIVER_X11 || SDL_VIDEO_DRIVER_WAYLAND || SDL_VIDEO_DRIVER_HAIKU || SDL_VIDEO_DRIVER_OS2
#if SDL_VIDEO_DRIVER_WINDOWS || SDL_VIDEO_DRIVER_WINRT || SDL_VIDEO_DRIVER_COCOA || SDL_VIDEO_DRIVER_UIKIT || SDL_VIDEO_DRIVER_X11 || SDL_VIDEO_DRIVER_WAYLAND || SDL_VIDEO_DRIVER_HAIKU || SDL_VIDEO_DRIVER_OS2 || SDL_VIDEO_DRIVER_RISCOS
static SDL_bool SDL_MessageboxValidForDriver(const SDL_MessageBoxData *messageboxdata, SDL_SYSWM_TYPE drivertype)
{
SDL_SysWMinfo info;
@ -4276,6 +4282,13 @@ SDL_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
retval = 0;
}
#endif
#if SDL_VIDEO_DRIVER_RISCOS
if (retval == -1 &&
SDL_MessageboxValidForDriver(messageboxdata, SDL_SYSWM_RISCOS) &&
RISCOS_ShowMessageBox(messageboxdata, buttonid) == 0) {
retval = 0;
}
#endif
#if SDL_VIDEO_DRIVER_VITA
if (retval == -1 &&
VITA_ShowMessageBox(messageboxdata, buttonid) == 0) {

41
src/video/riscos/SDL_riscosevents.c Normal file
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@ -0,0 +1,41 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_RISCOS
/* Being a null driver, there's no event stream. We just define stubs for
most of the API. */
#include "../../events/SDL_events_c.h"
#include "SDL_riscosvideo.h"
#include "SDL_riscosevents_c.h"
void
RISCOS_PumpEvents(_THIS)
{
/* do nothing. */
}
#endif /* SDL_VIDEO_DRIVER_RISCOS */
/* vi: set ts=4 sw=4 expandtab: */

33
src/video/riscos/SDL_riscosevents_c.h Normal file
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@ -0,0 +1,33 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#ifndef SDL_riscosevents_c_h_
#define SDL_riscosevents_c_h_
#include "../../SDL_internal.h"
#include "SDL_riscosvideo.h"
extern void RISCOS_PumpEvents(_THIS);
#endif /* SDL_riscosevents_c_h_ */
/* vi: set ts=4 sw=4 expandtab: */

148
src/video/riscos/SDL_riscosframebuffer.c Normal file
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@ -0,0 +1,148 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_RISCOS
#include "../SDL_sysvideo.h"
#include "SDL_riscosframebuffer_c.h"
#include "SDL_riscosvideo.h"
#include <kernel.h>
#include <swis.h>
#define DUMMY_SURFACE "_SDL_DummySurface"
typedef struct {
Uint32 size;
Uint32 count;
Uint32 start;
Uint32 end;
} sprite_area;
int SDL_RISCOS_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch)
{
const char *sprite_name = "display";
int width, height, size, bytesPerRow;
unsigned int sprite_mode;
_kernel_oserror *error;
_kernel_swi_regs regs;
sprite_area *buffer;
Uint32 pixelformat;
SDL_DisplayMode mode;
/* Free the old framebuffer surface */
buffer = (sprite_area *) SDL_SetWindowData(window, DUMMY_SURFACE, NULL);
SDL_free(buffer);
/* Create a new one */
SDL_GetWindowSize(window, &width, &height);
SDL_GetCurrentDisplayMode(SDL_GetWindowDisplayIndex(window), &mode);
if ((SDL_ISPIXELFORMAT_PACKED(mode.format) || SDL_ISPIXELFORMAT_ARRAY(mode.format))) {
pixelformat = mode.format;
sprite_mode = (unsigned int)mode.driverdata;
} else {
pixelformat = SDL_PIXELFORMAT_BGR888;
sprite_mode = (1 | (90 << 1) | (90 << 14) | (6 << 27));
}
bytesPerRow = SDL_BYTESPERPIXEL(pixelformat) * width;
if ((bytesPerRow & 3) != 0) {
bytesPerRow += 4 - (bytesPerRow & 3);
}
size = 60 + (bytesPerRow * height);
buffer = SDL_malloc(size);
if (!buffer) {
SDL_OutOfMemory();
return -1;
}
/* Initialise a sprite area */
buffer->size = size;
buffer->start = 16;
regs.r[0] = 256+9;
regs.r[1] = (unsigned int)buffer;
error = _kernel_swi(OS_SpriteOp, &regs, &regs);
if (error != NULL) {
SDL_SetError("Unable to initialise sprite area: %s (%i)", error->errmess, error->errnum);
SDL_free(buffer);
return -1;
}
regs.r[0] = 256+15;
regs.r[1] = (unsigned int)buffer;
regs.r[2] = (unsigned int)sprite_name;
regs.r[3] = 0;
regs.r[4] = width;
regs.r[5] = height;
regs.r[6] = sprite_mode;
error = _kernel_swi(OS_SpriteOp, &regs, &regs);
if (error != NULL) {
SDL_SetError("Unable to create sprite: %s (%i)", error->errmess, error->errnum);
SDL_free(buffer);
return -1;
}
/* Save the info and return! */
SDL_SetWindowData(window, DUMMY_SURFACE, buffer);
*format = pixelformat;
*pixels = ((Uint8 *)buffer) + 60;
*pitch = bytesPerRow;
return 0;
}
int SDL_RISCOS_UpdateWindowFramebuffer(_THIS, SDL_Window * window, const SDL_Rect * rects, int numrects)
{
_kernel_swi_regs regs;
sprite_area *buffer;
buffer = (sprite_area *) SDL_GetWindowData(window, DUMMY_SURFACE);
if (!buffer) {
return SDL_SetError("Couldn't find sprite for window");
}
regs.r[0] = 512+52;
regs.r[1] = (unsigned int)buffer;
regs.r[2] = (unsigned int)buffer + buffer->start;
regs.r[3] = window->x * 2;
regs.r[4] = window->y * 2;
regs.r[5] = 0x50;
regs.r[6] = 0;
regs.r[7] = 0;
_kernel_swi(OS_SpriteOp, &regs, &regs);
return 0;
}
void SDL_RISCOS_DestroyWindowFramebuffer(_THIS, SDL_Window * window)
{
sprite_area *buffer = (sprite_area *) SDL_SetWindowData(window, DUMMY_SURFACE, NULL);
SDL_free(buffer);
}
#endif /* SDL_VIDEO_DRIVER_RISCOS */
/* vi: set ts=4 sw=4 expandtab: */

33
src/video/riscos/SDL_riscosframebuffer_c.h Normal file
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@ -0,0 +1,33 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#ifndef SDL_riscosframebuffer_c_h_
#define SDL_riscosframebuffer_c_h_
#include "../../SDL_internal.h"
extern int SDL_RISCOS_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch);
extern int SDL_RISCOS_UpdateWindowFramebuffer(_THIS, SDL_Window * window, const SDL_Rect * rects, int numrects);
extern void SDL_RISCOS_DestroyWindowFramebuffer(_THIS, SDL_Window * window);
#endif /* SDL_riscosframebuffer_c_h_ */
/* vi: set ts=4 sw=4 expandtab: */

68
src/video/riscos/SDL_riscosmessagebox.c Normal file
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@ -0,0 +1,68 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_RISCOS
#include "SDL_messagebox.h"
#include "SDL_riscosmessagebox.h"
#include <kernel.h>
#include <swis.h>
int
RISCOS_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
{
_kernel_swi_regs regs;
_kernel_oserror error;
char buttonstring[1024];
int i;
error.errnum = 0;
SDL_strlcpy(error.errmess, messageboxdata->message, 252);
regs.r[0] = (unsigned int)&error;
regs.r[1] = (1 << 8) | (1 << 4);
if (messageboxdata->flags == SDL_MESSAGEBOX_INFORMATION)
regs.r[1] |= (1 << 9);
else if (messageboxdata->flags == SDL_MESSAGEBOX_WARNING)
regs.r[1] |= (2 << 9);
regs.r[2] = (unsigned int)messageboxdata->title;
regs.r[3] = 0;
regs.r[4] = 0;
SDL_strlcpy(buttonstring, "" , 1024);
for (i = 0; i < messageboxdata->numbuttons; i++) {
SDL_strlcat(buttonstring, messageboxdata->buttons[i].text, 1024);
if (i + 1 < messageboxdata->numbuttons)
SDL_strlcat(buttonstring, ",", 1024);
}
regs.r[5] = (unsigned int)buttonstring;
_kernel_swi(Wimp_ReportError, &regs, &regs);
*buttonid = (regs.r[1] == 0) ? -1 : messageboxdata->buttons[regs.r[1] - 3].buttonid;
return 0;
}
#endif /* SDL_VIDEO_DRIVER_RISCOS */
/* vi: set ts=4 sw=4 expandtab: */

29
src/video/riscos/SDL_riscosmessagebox.h Normal file
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@ -0,0 +1,29 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_RISCOS
extern int RISCOS_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid);
#endif /* SDL_VIDEO_DRIVER_RISCOS */
/* vi: set ts=4 sw=4 expandtab: */

251
src/video/riscos/SDL_riscosvideo.c Normal file
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@ -0,0 +1,251 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_RISCOS
/* Dummy SDL video driver implementation; this is just enough to make an
* SDL-based application THINK it's got a working video driver, for
* applications that call SDL_Init(SDL_INIT_VIDEO) when they don't need it,
* and also for use as a collection of stubs when porting SDL to a new
* platform for which you haven't yet written a valid video driver.
*
* This is also a great way to determine bottlenecks: if you think that SDL
* is a performance problem for a given platform, enable this driver, and
* then see if your application runs faster without video overhead.
*
* Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
* of this was cut-and-pasted from Stephane Peter's work in the AAlib
* SDL video driver. Renamed to "DUMMY" by Sam Lantinga.
*/
#include "SDL_version.h"
#include "SDL_video.h"
#include "SDL_mouse.h"
#include "SDL_syswm.h"
#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
#include "SDL_riscosvideo.h"
#include "SDL_riscosevents_c.h"
#include "SDL_riscosframebuffer_c.h"
#include <kernel.h>
#include <swis.h>
#define RISCOSVID_DRIVER_NAME "riscos"
/* Initialization/Query functions */
static int RISCOS_VideoInit(_THIS);
static int RISCOS_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode);
static void RISCOS_VideoQuit(_THIS);
SDL_bool RISCOS_GetWindowWMInfo(_THIS, SDL_Window * window, struct SDL_SysWMinfo *info);
/* RISC OS driver bootstrap functions */
static void
RISCOS_DeleteDevice(SDL_VideoDevice * device)
{
SDL_free(device);
}
static SDL_VideoDevice *
RISCOS_CreateDevice(int devindex)
{
SDL_VideoDevice *device;
/* Initialize all variables that we clean on shutdown */
device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
if (!device) {
SDL_OutOfMemory();
return (0);
}
/* Set the function pointers */
device->VideoInit = RISCOS_VideoInit;
device->VideoQuit = RISCOS_VideoQuit;
device->SetDisplayMode = RISCOS_SetDisplayMode;
device->PumpEvents = RISCOS_PumpEvents;
device->GetWindowWMInfo = RISCOS_GetWindowWMInfo;
device->CreateWindowFramebuffer = SDL_RISCOS_CreateWindowFramebuffer;
device->UpdateWindowFramebuffer = SDL_RISCOS_UpdateWindowFramebuffer;
device->DestroyWindowFramebuffer = SDL_RISCOS_DestroyWindowFramebuffer;
device->free = RISCOS_DeleteDevice;
return device;
}
VideoBootStrap RISCOS_bootstrap = {
RISCOSVID_DRIVER_NAME, "SDL RISC OS video driver",
RISCOS_CreateDevice
};
enum {
MODE_FLAG_565 = 1 << 7,
MODE_FLAG_COLOUR_SPACE = 0xF << 12,
MODE_FLAG_TBGR = 0,
MODE_FLAG_TRGB = 1 << 14,
MODE_FLAG_ABGR = 1 << 15,
MODE_FLAG_ARGB = MODE_FLAG_TRGB | MODE_FLAG_ABGR
};
#define MODE_350(type, xdpi, ydpi) \
(1 | (xdpi << 1) | (ydpi << 14) | (type << 27))
#define MODE_521(type, xeig, yeig, flags) \
(0x78000001 | (xeig << 4) | (yeig << 6) | (flags & 0xFF00) | (type << 20))
static const struct {
SDL_PixelFormatEnum pixel_format;
int modeflags, ncolour, log2bpp, sprite_type;
} mode_to_pixelformat[] = {
{ SDL_PIXELFORMAT_INDEX1LSB, 0, 1, 0, 1 },
/* { SDL_PIXELFORMAT_INDEX2LSB, 0, 3, 1, 2 }, */
{ SDL_PIXELFORMAT_INDEX4LSB, 0, 15, 2, 3 },
{ SDL_PIXELFORMAT_INDEX8, MODE_FLAG_565, 255, 3, 4 },
{ SDL_PIXELFORMAT_BGR555, MODE_FLAG_TBGR, 65535, 4, 5 },
{ SDL_PIXELFORMAT_RGB555, MODE_FLAG_TRGB, 65535, 4, 5 },
{ SDL_PIXELFORMAT_ABGR1555, MODE_FLAG_ABGR, 65535, 4, 5 },
{ SDL_PIXELFORMAT_ARGB1555, MODE_FLAG_ARGB, 65535, 4, 5 },
{ SDL_PIXELFORMAT_BGR444, MODE_FLAG_TBGR, 4095, 4, 16 },
{ SDL_PIXELFORMAT_RGB444, MODE_FLAG_TRGB, 4095, 4, 16 },
{ SDL_PIXELFORMAT_ABGR4444, MODE_FLAG_ABGR, 4095, 4, 16 },
{ SDL_PIXELFORMAT_ARGB4444, MODE_FLAG_ARGB, 4095, 4, 16 },
{ SDL_PIXELFORMAT_BGR565, MODE_FLAG_TBGR | MODE_FLAG_565, 65535, 4, 10 },
{ SDL_PIXELFORMAT_RGB565, MODE_FLAG_TRGB | MODE_FLAG_565, 65535, 4, 10 },
{ SDL_PIXELFORMAT_BGR24, MODE_FLAG_TBGR, 16777215, 6, 8 },
{ SDL_PIXELFORMAT_RGB24, MODE_FLAG_TRGB, 16777215, 6, 8 },
{ SDL_PIXELFORMAT_BGR888, MODE_FLAG_TBGR, -1, 5, 6 },
{ SDL_PIXELFORMAT_RGB888, MODE_FLAG_TRGB, -1, 5, 6 },
{ SDL_PIXELFORMAT_ABGR8888, MODE_FLAG_ABGR, -1, 5, 6 },
{ SDL_PIXELFORMAT_ARGB8888, MODE_FLAG_ARGB, -1, 5, 6 }
};
static int ReadModeVariable(int mode, int variable) {
_kernel_swi_regs regs;
regs.r[0] = mode;
regs.r[1] = variable;
_kernel_swi(OS_ReadModeVariable, &regs, &regs);
return regs.r[2];
}
SDL_PixelFormatEnum RISCOS_ModeToPixelFormat(int *mode) {
int i, log2bpp, ncolour, modeflags;
log2bpp = ReadModeVariable((int)mode, 9);
ncolour = ReadModeVariable((int)mode, 3);
modeflags = ReadModeVariable((int)mode, 0);
for (i = 0; i < SDL_arraysize(mode_to_pixelformat); i++) {
if (log2bpp == mode_to_pixelformat[i].log2bpp &&
(ncolour == mode_to_pixelformat[i].ncolour || ncolour == 0) &&
(modeflags & (MODE_FLAG_565 | MODE_FLAG_COLOUR_SPACE)) == mode_to_pixelformat[i].modeflags) {
return mode_to_pixelformat[i].pixel_format;
}
}
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
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, &regs, &regs);
if (error != NULL) {
SDL_SetError("Unable to retrieve the current screen mode: %s (%i)", error->errmess, error->errnum);
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
RISCOS_VideoQuit(_THIS)
{
}
SDL_bool RISCOS_GetWindowWMInfo(_THIS, SDL_Window * window, struct SDL_SysWMinfo *info) {
if (info->version.major == SDL_MAJOR_VERSION &&
info->version.minor == SDL_MINOR_VERSION) {
info->subsystem = SDL_SYSWM_RISCOS;
return SDL_TRUE;
} else {
SDL_SetError("Application not compiled with SDL %d.%d",
SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
return SDL_FALSE;
}
}
#endif /* SDL_VIDEO_DRIVER_RISCOS */
/* vi: set ts=4 sw=4 expandtab: */

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src/video/riscos/SDL_riscosvideo.h Normal file
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#ifndef SDL_riscosvideo_h_
#define SDL_riscosvideo_h_
#include "../SDL_sysvideo.h"
#endif /* SDL_riscosvideo_h_ */
/* vi: set ts=4 sw=4 expandtab: */