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/*
* video output handling using plugin_lib
* (C) Gražvydas "notaz" Ignotas, 2011
*
* This work is licensed under the terms of any of these licenses
* (at your option):
* - GNU GPL, version 2 or later.
* - GNU LGPL, version 2.1 or later.
* See the COPYING file in the top-level directory.
*/
#include <string.h>
#include "gpu.h"
#include "cspace.h"
#include "../../frontend/plugin_lib.h"
static const struct rearmed_cbs *cbs;
static void *screen_buf;
int vout_init(void)
{
return 0;
}
int vout_finish(void)
{
return 0;
}
static void check_mode_change(void)
{
static uint32_t old_status;
static int old_h;
int w = gpu.screen.hres;
int h = gpu.screen.h;
gpu.state.enhancement_active =
gpu.enhancement_bufer != NULL && gpu.state.enhancement_enable
&& w <= 512 && h <= 256 && !gpu.status.rgb24;
if (gpu.state.enhancement_active) {
w *= 2;
h *= 2;
}
// width|rgb24 change?
if ((gpu.status.reg ^ old_status) & ((7<<16)|(1<<21)) || h != old_h)
{
old_status = gpu.status.reg;
old_h = h;
screen_buf = cbs->pl_vout_set_mode(w, h,
(gpu.status.rgb24 && !cbs->only_16bpp) ? 24 : 16);
}
}
static void blit(void)
{
int x = gpu.screen.x & ~1; // alignment needed by blitter
int y = gpu.screen.y;
int w = gpu.screen.w;
int h = gpu.screen.h;
uint16_t *vram = gpu.vram;
int stride = gpu.screen.hres;
int vram_stride = 1024;
int vram_mask = 1024 * 512 - 1;
int fb_offs, doffs;
uint8_t *dest;
dest = (uint8_t *)screen_buf;
if (dest == NULL)
return;
if (gpu.state.enhancement_active) {
vram = gpu.enhancement_bufer;
x *= 2;
y *= 2;
w *= 2;
h *= 2;
stride *= 2;
vram_stride = 2048;
vram_mask = 2048 * 1024 - 1;
}
fb_offs = y * vram_stride + x;
// only do centering, at least for now
doffs = (stride - w) / 2 & ~1;
if (gpu.status.rgb24)
{
if (cbs->only_16bpp) {
dest += doffs * 2;
for (; h-- > 0; dest += stride * 2, fb_offs += vram_stride)
{
fb_offs &= vram_mask;
bgr888_to_rgb565(dest, vram + fb_offs, w * 3);
}
}
else {
dest += (doffs / 8) * 24;
for (; h-- > 0; dest += stride * 3, fb_offs += vram_stride)
{
fb_offs &= vram_mask;
bgr888_to_rgb888(dest, vram + fb_offs, w * 3);
}
}
}
else
{
dest += doffs * 2;
for (; h-- > 0; dest += stride * 2, fb_offs += vram_stride)
{
fb_offs &= vram_mask;
bgr555_to_rgb565(dest, vram + fb_offs, w * 2);
}
}
screen_buf = cbs->pl_vout_flip();
}
void vout_update(void)
{
check_mode_change();
if (cbs->pl_vout_raw_flip)
cbs->pl_vout_raw_flip(gpu.screen.x, gpu.screen.y);
else
blit();
}
void vout_blank(void)
{
check_mode_change();
if (cbs->pl_vout_raw_flip == NULL) {
int bytespp = gpu.status.rgb24 ? 3 : 2;
memset(screen_buf, 0, gpu.screen.hres * gpu.screen.h * bytespp);
screen_buf = cbs->pl_vout_flip();
}
}
long GPUopen(void **unused)
{
gpu.frameskip.active = 0;
gpu.frameskip.frame_ready = 1;
cbs->pl_vout_open();
screen_buf = cbs->pl_vout_flip();
return 0;
}
long GPUclose(void)
{
cbs->pl_vout_close();
return 0;
}
void vout_set_config(const struct rearmed_cbs *cbs_)
{
cbs = cbs_;
}
// vim:shiftwidth=2:expandtab
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