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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;
int vout_init(void)
{
return 0;
}
int vout_finish(void)
{
return 0;
}
static void check_mode_change(int force)
{
static uint32_t old_status;
static int old_h;
int w = gpu.screen.hres;
int h = gpu.screen.h;
int w_out = w;
int h_out = h;
gpu.state.enhancement_active =
gpu.get_enhancement_bufer != NULL && gpu.state.enhancement_enable
&& w <= 512 && h <= 256 && !gpu.status.rgb24;
if (gpu.state.enhancement_active) {
w_out *= 2;
h_out *= 2;
}
// width|rgb24 change?
if (force || (gpu.status.reg ^ old_status) & ((7<<16)|(1<<21)) || h != old_h)
{
old_status = gpu.status.reg;
old_h = h;
cbs->pl_vout_set_mode(w_out, h_out, w, h,
(gpu.status.rgb24 && !cbs->only_16bpp) ? 24 : 16);
}
}
void vout_update(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 vram_h = 512;
if (w == 0 || h == 0)
return;
check_mode_change(0);
if (gpu.state.enhancement_active)
vram = gpu.get_enhancement_bufer(&x, &y, &w, &h, &vram_h);
if (y + h > vram_h) {
if (y + h - vram_h > h / 2) {
// wrap
h -= vram_h - y;
y = 0;
}
else
// clip
h = vram_h - y;
}
vram += y * 1024 + x;
cbs->pl_vout_flip(vram, 1024, gpu.status.rgb24, w, h);
}
void vout_blank(void)
{
int w = gpu.screen.hres;
int h = gpu.screen.h;
if (gpu.state.enhancement_active) {
w *= 2;
h *= 2;
}
check_mode_change(0);
cbs->pl_vout_flip(NULL, 1024, gpu.status.rgb24, w, h);
}
long GPUopen(void **unused)
{
gpu.frameskip.active = 0;
gpu.frameskip.frame_ready = 1;
cbs->pl_vout_open();
check_mode_change(1);
vout_update();
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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