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SDL_ndsrender.c
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SDL_ndsrender.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include <stdio.h>
#include <stdlib.h>
#include <nds.h>
#include "SDL_config.h"
#include "SDL_video.h"
#include "../SDL_sysvideo.h"
#include "../SDL_yuv_sw_c.h"
#include "../SDL_renderer_sw.h"
/* SDL surface based renderer implementation */
static SDL_Renderer *NDS_CreateRenderer(SDL_Window * window, Uint32 flags);
static int NDS_ActivateRenderer(SDL_Renderer * renderer);
static int NDS_DisplayModeChanged(SDL_Renderer * renderer);
static int NDS_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int NDS_QueryTexturePixels(SDL_Renderer * renderer,
SDL_Texture * texture, void **pixels,
int *pitch);
static int NDS_SetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture,
const SDL_Color * colors, int firstcolor,
int ncolors);
static int NDS_GetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture, SDL_Color * colors,
int firstcolor, int ncolors);
static int NDS_SetTextureColorMod(SDL_Renderer * renderer,
SDL_Texture * texture);
static int NDS_SetTextureAlphaMod(SDL_Renderer * renderer,
SDL_Texture * texture);
static int NDS_SetTextureBlendMode(SDL_Renderer * renderer,
SDL_Texture * texture);
static int NDS_SetTextureScaleMode(SDL_Renderer * renderer,
SDL_Texture * texture);
static int NDS_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels,
int pitch);
static int NDS_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch);
static void NDS_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void NDS_DirtyTexture(SDL_Renderer * renderer,
SDL_Texture * texture, int numrects,
const SDL_Rect * rects);
static int NDS_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g,
Uint8 b, Uint8 a, const SDL_Rect * rect);
static int NDS_RenderCopy(SDL_Renderer * renderer,
SDL_Texture * texture,
const SDL_Rect * srcrect,
const SDL_Rect * dstrect);
static void NDS_RenderPresent(SDL_Renderer * renderer);
static void NDS_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void NDS_DestroyRenderer(SDL_Renderer * renderer);
SDL_RenderDriver NDS_RenderDriver = {
NDS_CreateRenderer,
{"nds", SDL_RENDERER_PRESENTCOPY}
/* (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
SDL_RENDERER_PRESENTDISCARD),*/
};
typedef struct
{
int current_screen;
u16* fb;
} NDS_RenderData;
/* this is mainly hackish testing/debugging stuff to get cleaned up soon
anything named sdlds_blah shouldn't make it into the stable version
*/
u16
sdlds_rgb2bgr(u16 c)
{
/* hack to get the proper colors until I actually get BGR555 to work right */
u16 Rmask = 0x7C00, Bmask = 0x001F, GAmask = 0x83E0, r, b;
r = (c & Rmask) >> 10;
b = (c & Bmask) << 10;
return (c & GAmask) | r | b;
}
void
sdlds_surf2vram(SDL_Surface * s)
{
if (s->w == 256) {
u16 tmpbuf[0x20000];
int i;
dmaCopy((u8 *) (s->pixels) + 156 * sizeof(u16),
tmpbuf, 256 * 192 * sizeof(u16));
/* hack to fix the pixel format until I figure out why BGR doesn't work */
for (i = 0; i < 256 * 192; ++i) {
tmpbuf[i] = sdlds_rgb2bgr(tmpbuf[i]);
}
dmaCopy(tmpbuf, VRAM_A, 256 * 192 * sizeof(u16));
}
}
void
sdlds_print_pixfmt_info(SDL_PixelFormat * f)
{
if (!f)
return;
printf("bpp: %d\nRGBA: %x %x %x %x\n",
f->BitsPerPixel, f->Rmask, f->Gmask, f->Bmask, f->Amask);
}
void
sdlds_print_surface_info(SDL_Surface * s)
{
if (!s)
return;
printf("flags: %x\nsize: %dx%d, pitch: %d\nlocked: %d, refcount: %d\n",
s->flags, s->w, s->h, s->pitch, s->locked, s->refcount);
sdlds_print_pixfmt_info(s->format);
}
SDL_Renderer *
NDS_CreateRenderer(SDL_Window * window, Uint32 flags)
{
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
SDL_DisplayMode *displayMode = &display->current_mode;
SDL_Renderer *renderer;
NDS_RenderData *data;
int i, n;
int bpp = 15;
Uint32 Rmask, Gmask, Bmask, Amask;
/* Uint32 Rmask = 0x7C00, Gmask = 0x03E0, Bmask = 0x001F, Amask = 0x8000;
Uint32 Rmask = 0x001F, Gmask = 0x03E0, Bmask = 0x7C00, Amask = 0x8000;
*/
/* hard coded this to BGR555 for now */
if (!SDL_PixelFormatEnumToMasks(SDL_PIXELFORMAT_BGR555, &bpp,
&Rmask, &Gmask, &Bmask, &Amask)) {
SDL_SetError("Unknown display format");
return NULL;
}
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
data = (NDS_RenderData *) SDL_malloc(sizeof(*data));
if (!data) {
NDS_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
SDL_zerop(data);
renderer->RenderFill = NDS_RenderFill;
renderer->RenderCopy = NDS_RenderCopy;
renderer->RenderPresent = NDS_RenderPresent;
renderer->DestroyRenderer = NDS_DestroyRenderer;
renderer->info.name = NDS_RenderDriver.info.name;
renderer->info.flags = 0;
renderer->window = window->id;
renderer->driverdata = data;
Setup_SoftwareRenderer(renderer); /* TODO: well, "TODON'T" is more like it */
if (flags & SDL_RENDERER_PRESENTFLIP2) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
n = 2;
} else if (flags & SDL_RENDERER_PRESENTFLIP3) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
n = 3;
} else {
renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
n = 1;
}/*
for (i = 0; i < n; ++i) {
data->screens[i] =
SDL_CreateRGBSurface(0, 256, 192, bpp, Rmask, Gmask, Bmask,
Amask);
if (!data->screens[i]) {
NDS_DestroyRenderer(renderer);
return NULL;
}
SDL_SetSurfacePalette(data->screens[i], display->palette);
sdlds_print_surface_info(data->screens[i]);
}*/
data->fb = (u16*)0x06020000;
return renderer;
}
static int
NDS_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,
Uint8 a, const SDL_Rect * rect)
{
NDS_RenderData *data = (NDS_RenderData *) renderer->driverdata;
SDL_Rect real_rect = *rect;
u16 color;
int i, j;
color = RGB15(r>>3,g>>3,b>>3);
for (i = real_rect.x; i < real_rect.x+real_rect.w; ++i) {
for (j = real_rect.y; j < real_rect.y+real_rect.h; ++j) {
data->fb[(j + real_rect.y) * 256 + i + real_rect.x] =
0x8000 | color;
}
}
return 0;
}
static int
NDS_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
{
NDS_RenderData *data = (NDS_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
#if 0
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
SDL_Surface *target = data->screens[data->current_screen];
void *pixels =
(Uint8 *) target->pixels + dstrect->y * target->pitch +
dstrect->x * target->format->BytesPerPixel;
return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
srcrect, display->current_mode.format,
dstrect->w, dstrect->h, pixels,
target->pitch);
} else {
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
SDL_Surface *target = data->screens[data->current_screen];
SDL_Rect real_srcrect = *srcrect;
SDL_Rect real_dstrect = *dstrect;
/*sdlds_print_surface_info(surface);
sdlds_print_surface_info(target); */
sdlds_surf2vram(surface);
return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
}
#endif
/* copy it directly to vram */
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
sdlds_surf2vram(surface);
/*
int sx = srcrect->x, sy = srcrect->y, sw = srcrect->w, sh = srcrect->h;
int dx = dstrect->x, dy = dstrect->y, dw = dstrect->w, dh = dstrect->h;
int si, sj, di, dj;
for (sj = 0, dj = 0; sj < sh && dj < dh; ++sj, ++dj) {
for (si = 0, di = 0; si < sw && di < dw; ++si, ++di) {
data->fb[(dj + dy) * 256 + di + dx] = 0x8000 |
((u16 *) surface->pixels)[(sj + sy) * (surface->w) + si +
sx];
}
}*/
return 0;
}
static void
NDS_RenderPresent(SDL_Renderer * renderer)
{
NDS_RenderData *data = (NDS_RenderData *) renderer->driverdata;
/* Send the data to the display TODO */
/* Update the flipping chain, if any */
if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
data->current_screen = (data->current_screen + 1) % 2;
} else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
data->current_screen = (data->current_screen + 1) % 3;
}
}
static void
NDS_DestroyRenderer(SDL_Renderer * renderer)
{
NDS_RenderData *data = (NDS_RenderData *) renderer->driverdata;
int i;
printf("NDS_DestroyRenderer(renderer)\n");
printf(" renderer: %s\n", renderer->info.name);
if (data) {
/*for (i = 0; i < SDL_arraysize(data->screens); ++i) {
if (data->screens[i]) {
SDL_FreeSurface(data->screens[i]);
}
}*/
SDL_free(data);
}
SDL_free(renderer);
}
/* vi: set ts=4 sw=4 expandtab: */