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-rw-r--r--backends/platform/dc/dc.h9
-rw-r--r--backends/platform/dc/dcmain.cpp2
-rw-r--r--backends/platform/dc/display.cpp137
3 files changed, 123 insertions, 25 deletions
diff --git a/backends/platform/dc/dc.h b/backends/platform/dc/dc.h
index 45d9aa99c2..c3e81aef73 100644
--- a/backends/platform/dc/dc.h
+++ b/backends/platform/dc/dc.h
@@ -82,6 +82,12 @@ class OSystem_Dreamcast : private DCHardware, public BaseBackend, public Filesys
void setPalette(const byte *colors, uint start, uint num);
void grabPalette(byte *colors, uint start, uint num);
+ // Determine the pixel format currently in use for screen rendering.
+ Graphics::PixelFormat getScreenFormat() const;
+
+ // Returns a list of all pixel formats supported by the backend.
+ Common::List<Graphics::PixelFormat> getSupportedFormats();
+
// Set the size of the video bitmap.
// Typically, 320x200
void initSize(uint w, uint h, const Graphics::PixelFormat *format);
@@ -198,7 +204,7 @@ class OSystem_Dreamcast : private DCHardware, public BaseBackend, public Filesys
int _current_shake_pos, _screen_w, _screen_h;
int _overlay_x, _overlay_y;
unsigned char *_ms_buf;
- unsigned char _ms_keycolor;
+ uint32 _ms_keycolor;
bool _overlay_visible, _overlay_dirty, _screen_dirty;
int _screen_buffer, _overlay_buffer, _mouse_buffer;
bool _aspect_stretch, _softkbd_on, _enable_cursor_palette;
@@ -214,6 +220,7 @@ class OSystem_Dreamcast : private DCHardware, public BaseBackend, public Filesys
unsigned short palette[256], cursor_palette[256];
Graphics::Surface _framebuffer;
+ int _screenFormat, _mouseFormat;
int temp_sound_buffer[RING_BUFFER_SAMPLES>>SOUND_BUFFER_SHIFT];
diff --git a/backends/platform/dc/dcmain.cpp b/backends/platform/dc/dcmain.cpp
index 078c6266a4..8ad4708ebf 100644
--- a/backends/platform/dc/dcmain.cpp
+++ b/backends/platform/dc/dcmain.cpp
@@ -44,7 +44,7 @@ OSystem_Dreamcast::OSystem_Dreamcast()
: _devpoll(0), screen(NULL), mouse(NULL), overlay(NULL), _softkbd(this),
_ms_buf(NULL), _timer(NULL), _mixer(NULL), _savefile(NULL),
_current_shake_pos(0), _aspect_stretch(false), _softkbd_on(false),
- _softkbd_motion(0), _enable_cursor_palette(false)
+ _softkbd_motion(0), _enable_cursor_palette(false), _screenFormat(0)
{
memset(screen_tx, 0, sizeof(screen_tx));
memset(mouse_tx, 0, sizeof(mouse_tx));
diff --git a/backends/platform/dc/display.cpp b/backends/platform/dc/display.cpp
index c6be514e36..75bf31f4f6 100644
--- a/backends/platform/dc/display.cpp
+++ b/backends/platform/dc/display.cpp
@@ -41,6 +41,22 @@
#define TOP_OFFSET (_top_offset+_yscale*_current_shake_pos)
+static const struct {
+ Graphics::PixelFormat pixelFormat;
+ unsigned int textureFormat;
+ operator const Graphics::PixelFormat&() const { return pixelFormat; }
+} screenFormats[] = {
+ /* Note: These are ordered by _increasing_ preference, so that
+ CLUT8 appears at index 0. getSupportedFormats() will return
+ them in reversed order. */
+ { Graphics::PixelFormat::createFormatCLUT8(), TA_TEXTUREMODE_ARGB1555 },
+ { Graphics::PixelFormat(2,4,4,4,4,8,4,0,12), TA_TEXTUREMODE_ARGB4444 },
+ { Graphics::PixelFormat(2,5,5,5,1,10,5,0,15), TA_TEXTUREMODE_ARGB1555 },
+ { Graphics::PixelFormat(2,5,6,5,0,11,5,0,0), TA_TEXTUREMODE_RGB565 },
+};
+#define NUM_FORMATS (sizeof(screenFormats)/sizeof(screenFormats[0]))
+
+
#define QACR0 (*(volatile unsigned int *)(void *)0xff000038)
#define QACR1 (*(volatile unsigned int *)(void *)0xff00003c)
@@ -178,6 +194,20 @@ void OSystem_Dreamcast::grabPalette(byte *colors, uint start, uint num)
}
}
+Graphics::PixelFormat OSystem_Dreamcast::getScreenFormat() const
+{
+ return screenFormats[_screenFormat];
+}
+
+Common::List<Graphics::PixelFormat> OSystem_Dreamcast::getSupportedFormats()
+{
+ Common::List<Graphics::PixelFormat> list;
+ int i;
+ for (i=0; i<NUM_FORMATS; i++)
+ list.push_front(screenFormats[i]);
+ return list;
+}
+
void OSystem_Dreamcast::setScaling()
{
if (_screen_w > 400) {
@@ -197,6 +227,13 @@ void OSystem_Dreamcast::initSize(uint w, uint h, const Graphics::PixelFormat *fo
{
assert(w <= SCREEN_W && h <= SCREEN_H);
+ int i = 0;
+ if (format != NULL)
+ for (i=NUM_FORMATS-1; i>0; --i)
+ if (*format == screenFormats[i])
+ break;
+ _screenFormat = i;
+
_overlay_visible = false;
_overlay_fade = 0.0;
_screen_w = w;
@@ -208,7 +245,7 @@ void OSystem_Dreamcast::initSize(uint w, uint h, const Graphics::PixelFormat *fo
setScaling();
ta_sync();
if (!screen)
- screen = new unsigned char[SCREEN_W*SCREEN_H];
+ screen = new unsigned char[SCREEN_W*SCREEN_H*2];
if (!overlay)
overlay = new unsigned short[OVL_W*OVL_H];
for (int i=0; i<NUM_BUFFERS; i++)
@@ -227,21 +264,24 @@ void OSystem_Dreamcast::initSize(uint w, uint h, const Graphics::PixelFormat *fo
_overlay_dirty = true;
*(volatile unsigned int *)(0xa05f80e4) = SCREEN_W/32; //stride
// dc_reset_screen(0, 0);
- memset(screen, 0, SCREEN_W*SCREEN_H);
+ memset(screen, 0, SCREEN_W*SCREEN_H*2);
memset(overlay, 0, OVL_W*OVL_H*sizeof(unsigned short));
_devpoll = Timer();
}
void OSystem_Dreamcast::copyRectToScreen(const byte *buf, int pitch, int x, int y,
- int w, int h)
+ int w, int h)
{
if (w<1 || h<1)
return;
- unsigned char *dst = screen + y*SCREEN_W + x;
+ if (_screenFormat != 0) {
+ x<<=1; w<<=1;
+ }
+ unsigned char *dst = screen + y*SCREEN_W*2 + x;
do {
memcpy(dst, buf, w);
- dst += SCREEN_W;
+ dst += SCREEN_W*2;
buf += pitch;
} while (--h);
_screen_dirty = true;
@@ -271,11 +311,21 @@ void OSystem_Dreamcast::setMouseCursor(const byte *buf, uint w, uint h,
_ms_hotspot_x = hotspot_x;
_ms_hotspot_y = hotspot_y;
- _ms_keycolor = (byte)keycolor;
+ _ms_keycolor = keycolor;
+
+ int i = 0;
+ if (format != NULL)
+ for (i=NUM_FORMATS-1; i>0; --i)
+ if (*format == screenFormats[i])
+ break;
+ _mouseFormat = i;
if (_ms_buf)
free(_ms_buf);
+ if (_mouseFormat != 0)
+ w <<= 1;
+
_ms_buf = (byte *)malloc(w * h);
memcpy(_ms_buf, buf, w * h);
}
@@ -298,12 +348,20 @@ void OSystem_Dreamcast::updateScreenTextures(void)
// while ((*((volatile unsigned int *)(void*)0xa05f810c) & 0x3ff) != 200);
// *((volatile unsigned int *)(void*)0xa05f8040) = 0xff0000;
- for ( int y = 0; y<_screen_h; y++ )
- {
- texture_memcpy64_pal( dst, src, _screen_w>>5, palette );
- src += SCREEN_W;
- dst += SCREEN_W;
- }
+ if (_screenFormat == 0)
+ for ( int y = 0; y<_screen_h; y++ )
+ {
+ texture_memcpy64_pal( dst, src, _screen_w>>5, palette );
+ src += SCREEN_W*2;
+ dst += SCREEN_W;
+ }
+ else
+ for ( int y = 0; y<_screen_h; y++ )
+ {
+ texture_memcpy64( dst, src, _screen_w>>5 );
+ src += SCREEN_W*2;
+ dst += SCREEN_W;
+ }
_screen_dirty = false;
}
@@ -341,8 +399,9 @@ void OSystem_Dreamcast::updateScreenPolygons(void)
mypoly.mode2 =
TA_POLYMODE2_BLEND_SRC|TA_POLYMODE2_FOG_DISABLED|TA_POLYMODE2_TEXTURE_REPLACE|
TA_POLYMODE2_U_SIZE_1024|TA_POLYMODE2_V_SIZE_1024;
- mypoly.texture = TA_TEXTUREMODE_ARGB1555|TA_TEXTUREMODE_NON_TWIDDLED|
- TA_TEXTUREMODE_STRIDE|TA_TEXTUREMODE_ADDRESS(screen_tx[_screen_buffer]);
+ mypoly.texture = screenFormats[_screenFormat].textureFormat|
+ TA_TEXTUREMODE_NON_TWIDDLED|TA_TEXTUREMODE_STRIDE|
+ TA_TEXTUREMODE_ADDRESS(screen_tx[_screen_buffer]);
mypoly.red = mypoly.green = mypoly.blue = mypoly.alpha = 0;
@@ -471,17 +530,22 @@ void OSystem_Dreamcast::maybeRefreshScreen(void)
void OSystem_Dreamcast::drawMouse(int xdraw, int ydraw, int w, int h,
unsigned char *buf, bool visible)
{
+ if (!visible || buf == NULL || !w || !h || w>MOUSE_W || h>MOUSE_H) {
+ commit_dummy_transpoly();
+ return;
+ }
+
struct polygon_list mypoly;
struct packed_colour_vertex_list myvertex;
- unsigned short *pal = _enable_cursor_palette? cursor_palette : palette;
-
_mouse_buffer++;
_mouse_buffer &= NUM_BUFFERS-1;
unsigned short *dst = (unsigned short *)mouse_tx[_mouse_buffer];
+ unsigned int texturemode = screenFormats[_mouseFormat].textureFormat;
- if (visible && w && h && w<=MOUSE_W && h<=MOUSE_H)
+ if (_mouseFormat == 0) {
+ unsigned short *pal = _enable_cursor_palette? cursor_palette : palette;
for (int y=0; y<h; y++) {
int x;
for (x=0; x<w; x++)
@@ -492,9 +556,36 @@ void OSystem_Dreamcast::drawMouse(int xdraw, int ydraw, int w, int h,
*dst++ = pal[*buf++]|0x8000;
dst += MOUSE_W-x;
}
- else {
- commit_dummy_transpoly();
- return;
+ } else if(texturemode == TA_TEXTUREMODE_RGB565 &&
+ _ms_keycolor<=0xffff) {
+ /* Special handling when doing colorkey on RGB565; we need
+ to convert to ARGB1555 to get an alpha channel... */
+ texturemode = TA_TEXTUREMODE_ARGB1555;
+ unsigned short *bufs = (unsigned short *)buf;
+ for (int y=0; y<h; y++) {
+ int x;
+ for (x=0; x<w; x++)
+ if (*bufs == _ms_keycolor) {
+ *dst++ = 0;
+ bufs++;
+ } else {
+ unsigned short p = *bufs++;
+ *dst++ = (p&0x1f)|((p&0xffc0)>>1)|0x8000;
+ }
+ dst += MOUSE_W-x;
+ }
+ } else {
+ unsigned short *bufs = (unsigned short *)buf;
+ for (int y=0; y<h; y++) {
+ int x;
+ for (x=0; x<w; x++)
+ if (*bufs == _ms_keycolor) {
+ *dst++ = 0;
+ bufs++;
+ } else
+ *dst++ = *bufs++;
+ dst += MOUSE_W-x;
+ }
}
mypoly.cmd =
@@ -505,7 +596,7 @@ void OSystem_Dreamcast::drawMouse(int xdraw, int ydraw, int w, int h,
TA_POLYMODE2_BLEND_SRC_ALPHA|TA_POLYMODE2_BLEND_DST_INVALPHA|
TA_POLYMODE2_FOG_DISABLED|TA_POLYMODE2_TEXTURE_REPLACE|
TA_POLYMODE2_U_SIZE_128|TA_POLYMODE2_V_SIZE_128;
- mypoly.texture = TA_TEXTUREMODE_ARGB1555|TA_TEXTUREMODE_NON_TWIDDLED|
+ mypoly.texture = texturemode|TA_TEXTUREMODE_NON_TWIDDLED|
TA_TEXTUREMODE_ADDRESS(mouse_tx[_mouse_buffer]);
mypoly.red = mypoly.green = mypoly.blue = mypoly.alpha = 0;
@@ -631,8 +722,8 @@ Graphics::Surface *OSystem_Dreamcast::lockScreen()
_framebuffer.pixels = screen;
_framebuffer.w = _screen_w;
_framebuffer.h = _screen_h;
- _framebuffer.pitch = SCREEN_W;
- _framebuffer.bytesPerPixel = 1;
+ _framebuffer.pitch = SCREEN_W*2;
+ _framebuffer.bytesPerPixel = (_screenFormat == 0? 1 : 2);
return &_framebuffer;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 21:03:54 +0000