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RetroArch/gx/gx_video.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
* Copyright (C) 2011-2012 - Daniel De Matteis
* Copyright (C) 2012 - Michael Lelli
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "../driver.h"
#include "../general.h"
#include "../console/rarch_console_video.h"
#include "gx_video.h"
#include <gccore.h>
#include <ogcsys.h>
#include <malloc.h>
#include <stdlib.h>
#include <string.h>
void *g_framebuf[2];
unsigned g_current_framebuf;
bool g_vsync;
lwpq_t g_video_cond;
volatile bool g_draw_done;
uint32_t g_orientation;
struct
{
uint32_t data[512 * 256];
GXTexObj obj;
} g_tex ATTRIBUTE_ALIGN(32);
struct
{
uint32_t data[240 * 320];
GXTexObj obj;
} menu_tex ATTRIBUTE_ALIGN(32);
uint8_t gx_fifo[256 * 1024] ATTRIBUTE_ALIGN(32);
uint8_t display_list[1024] ATTRIBUTE_ALIGN(32);
uint16_t gx_width, gx_height;
size_t display_list_size;
float verts[16] ATTRIBUTE_ALIGN(32) = {
-1, 1, -0.5,
-1, -1, -0.5,
1, -1, -0.5,
1, 1, -0.5,
};
float vertex_ptr[8] ATTRIBUTE_ALIGN(32) = {
0, 0,
0, 1,
1, 1,
1, 0,
};
void gx_set_aspect_ratio(void *data, unsigned aspectratio_idx)
{
gx_video_t *gx = (gx_video_t*)driver.video_data;
if (g_console.aspect_ratio_index == ASPECT_RATIO_AUTO)
rarch_set_auto_viewport(g_extern.frame_cache.width, g_extern.frame_cache.height);
else if(g_console.aspect_ratio_index == ASPECT_RATIO_CORE)
rarch_set_core_viewport();
g_settings.video.aspect_ratio = aspectratio_lut[g_console.aspect_ratio_index].value;
g_settings.video.force_aspect = false;
gx->keep_aspect = true;
gx->should_resize = true;
}
static void retrace_callback(u32 retrace_count)
{
(void)retrace_count;
g_draw_done = true;
LWP_ThreadSignal(g_video_cond);
}
static void setup_video_mode(GXRModeObj *mode)
{
VIDEO_Configure(mode);
for (unsigned i = 0; i < 2; i++)
{
g_framebuf[i] = MEM_K0_TO_K1(SYS_AllocateFramebuffer(mode));
VIDEO_ClearFrameBuffer(mode, g_framebuf[i], COLOR_BLACK);
}
g_current_framebuf = 0;
g_draw_done = true;
g_orientation = ORIENTATION_NORMAL;
LWP_InitQueue(&g_video_cond);
VIDEO_SetNextFramebuffer(g_framebuf[0]);
VIDEO_SetPostRetraceCallback(retrace_callback);
VIDEO_SetBlack(false);
VIDEO_Flush();
VIDEO_WaitVSync();
if (mode->viTVMode & VI_NON_INTERLACE)
VIDEO_WaitVSync();
}
static void init_vtx(GXRModeObj *mode)
{
GX_SetViewport(0, 0, mode->fbWidth, mode->efbHeight, 0, 1);
GX_SetDispCopyYScale(GX_GetYScaleFactor(mode->efbHeight, mode->xfbHeight));
GX_SetScissor(0, 0, mode->fbWidth, mode->efbHeight);
GX_SetDispCopySrc(0, 0, mode->fbWidth, mode->efbHeight);
GX_SetDispCopyDst(mode->fbWidth, mode->xfbHeight);
GX_SetCopyFilter(mode->aa, mode->sample_pattern, (mode->xfbMode == VI_XFBMODE_SF) ? GX_FALSE : GX_TRUE,
mode->vfilter);
GX_SetCopyClear((GXColor) { 0, 0, 0, 0xff }, GX_MAX_Z24);
GX_SetFieldMode(mode->field_rendering, (mode->viHeight == 2 * mode->xfbHeight) ? GX_ENABLE : GX_DISABLE);
GX_SetPixelFmt(GX_PF_RGB8_Z24, GX_ZC_LINEAR);
GX_SetZMode(GX_ENABLE, GX_ALWAYS, GX_ENABLE);
GX_SetColorUpdate(GX_TRUE);
GX_SetAlphaUpdate(GX_FALSE);
Mtx44 m;
guOrtho(m, 1, -1, -1, 1, 0.4, 0.6);
GX_LoadProjectionMtx(m, GX_ORTHOGRAPHIC);
GX_ClearVtxDesc();
GX_SetVtxDesc(GX_VA_POS, GX_INDEX8);
GX_SetVtxDesc(GX_VA_TEX0, GX_INDEX8);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_F32, 0);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0);
GX_SetArray(GX_VA_POS, verts, 3 * sizeof(float));
GX_SetArray(GX_VA_TEX0, vertex_ptr, 2 * sizeof(float));
GX_SetNumTexGens(1);
GX_SetNumChans(0);
GX_SetTevOp(GX_TEVSTAGE0, GX_REPLACE);
GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLORNULL);
GX_InvVtxCache();
GX_SetBlendMode(GX_BM_BLEND, GX_BL_ONE, GX_BL_INVSRCALPHA, 0);
GX_Flush();
}
static void init_texture(unsigned width, unsigned height)
{
unsigned g_filter = g_settings.video.smooth ? GX_LINEAR : GX_NEAR;
GX_InitTexObj(&g_tex.obj, g_tex.data, width, height, GX_TF_RGB5A3, GX_CLAMP, GX_CLAMP, GX_FALSE);
GX_InitTexObjLOD(&g_tex.obj, g_filter, g_filter, 0, 0, 0, GX_TRUE, GX_FALSE, GX_ANISO_1);
GX_InitTexObj(&menu_tex.obj, menu_tex.data, 320, 240, GX_TF_RGBA8, GX_CLAMP, GX_CLAMP, GX_FALSE);
GX_InitTexObjLOD(&menu_tex.obj, g_filter, g_filter, 0, 0, 0, GX_TRUE, GX_FALSE, GX_ANISO_1);
GX_InvalidateTexAll();
}
static void build_disp_list(void)
{
DCInvalidateRange(display_list, sizeof(display_list));
GX_BeginDispList(display_list, sizeof(display_list));
GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
for (unsigned i = 0; i < 4; i++)
{
GX_Position1x8(i);
GX_TexCoord1x8(i);
}
GX_End();
display_list_size = GX_EndDispList();
}
static void gx_stop(void)
{
GX_DrawDone();
GX_AbortFrame();
GX_Flush();
VIDEO_SetBlack(true);
VIDEO_Flush();
VIDEO_WaitVSync();
for (unsigned i = 0; i < 2; i++)
free(MEM_K1_TO_K0(g_framebuf[i]));
}
static void gx_restart(void)
{
}
static void *gx_init(const video_info_t *video,
const input_driver_t **input, void **input_data)
{
if (driver.video_data)
return driver.video_data;
gx_video_t *gx = (gx_video_t*)calloc(1, sizeof(gx_video_t));
if (!gx)
return NULL;
g_vsync = video->vsync;
gx->win_width = gx_width;
gx->win_height = gx_height;
gx->should_resize = true;
return gx;
}
static void gx_start(void)
{
video_info_t video_info = {0};
video_info.vsync = g_settings.video.vsync;
video_info.force_aspect = false;
video_info.fullscreen = true;
video_info.smooth = g_settings.video.smooth;
video_info.input_scale = 2;
VIDEO_Init();
GXRModeObj *mode = VIDEO_GetPreferredMode(NULL);
setup_video_mode(mode);
GX_Init(gx_fifo, sizeof(gx_fifo));
GX_SetDispCopyGamma(g_console.gamma_correction);
GX_SetCullMode(GX_CULL_NONE);
GX_SetClipMode(GX_CLIP_DISABLE);
init_vtx(mode);
build_disp_list();
g_vsync = true;
gx_width = mode->fbWidth;
gx_height = mode->efbHeight;
driver.video_data = gx_init(&video_info, NULL, NULL);
}
#define ASM_BLITTER
#ifdef ASM_BLITTER
static __attribute__ ((noinline)) void update_texture_asm(const uint32_t *src,
unsigned width, unsigned height, unsigned pitch)
{
register uint32_t tmp0, tmp1, tmp2, tmp3, line2, line2b, line3, line3b, line4, line4b, line5;
register uint32_t ormask = 0x80008000u;
register uint32_t *dst = g_tex.data;
__asm__ __volatile__ (
" srwi %[width], %[width], 2 \n"
" srwi %[height], %[height], 2 \n"
" subi %[tmp3], %[dst], 4 \n"
" mr %[dst], %[tmp3] \n"
" subi %[dst], %[dst], 4 \n"
" mr %[line2], %[pitch] \n"
" addi %[line2b], %[line2], 4 \n"
" mulli %[line3], %[pitch], 2 \n"
" addi %[line3b], %[line3], 4 \n"
" mulli %[line4], %[pitch], 3 \n"
" addi %[line4b], %[line4], 4 \n"
" mulli %[line5], %[pitch], 4 \n"
"2: mtctr %[width] \n"
" mr %[tmp0], %[src] \n"
"1: lwz %[tmp1], 0(%[src]) \n"
" or %[tmp1], %[tmp1], %[ormask] \n"
" stwu %[tmp1], 8(%[dst]) \n"
" lwz %[tmp2], 4(%[src]) \n"
" or %[tmp2], %[tmp2], %[ormask] \n"
" stwu %[tmp2], 8(%[tmp3]) \n"
" lwzx %[tmp1], %[line2], %[src] \n"
" or %[tmp1], %[tmp1], %[ormask] \n"
" stwu %[tmp1], 8(%[dst]) \n"
" lwzx %[tmp2], %[line2b], %[src] \n"
" or %[tmp2], %[tmp2], %[ormask] \n"
" stwu %[tmp2], 8(%[tmp3]) \n"
" lwzx %[tmp1], %[line3], %[src] \n"
" or %[tmp1], %[tmp1], %[ormask] \n"
" stwu %[tmp1], 8(%[dst]) \n"
" lwzx %[tmp2], %[line3b], %[src] \n"
" or %[tmp2], %[tmp2], %[ormask] \n"
" stwu %[tmp2], 8(%[tmp3]) \n"
" lwzx %[tmp1], %[line4], %[src] \n"
" or %[tmp1], %[tmp1], %[ormask] \n"
" stwu %[tmp1], 8(%[dst]) \n"
" lwzx %[tmp2], %[line4b], %[src] \n"
" or %[tmp2], %[tmp2], %[ormask] \n"
" stwu %[tmp2], 8(%[tmp3]) \n"
" addi %[src], %[src], 8 \n"
" bdnz 1b \n"
" add %[src], %[tmp0], %[line5] \n"
" subic. %[height], %[height], 1 \n"
" bne 2b \n"
: [tmp0] "=&b" (tmp0),
[tmp1] "=&b" (tmp1),
[tmp2] "=&b" (tmp2),
[tmp3] "=&b" (tmp3),
[line2] "=&b" (line2),
[line2b] "=&b" (line2b),
[line3] "=&b" (line3),
[line3b] "=&b" (line3b),
[line4] "=&b" (line4),
[line4b] "=&b" (line4b),
[line5] "=&b" (line5),
[dst] "+b" (dst)
: [src] "b" (src),
[width] "b" (width),
[height] "b" (height),
[pitch] "b" (pitch),
[ormask] "b" (ormask)
);
}
#endif
// Set MSB to get full RGB555.
#define RGB15toRGB5A3(col) ((col) | 0x80008000u)
#define BLIT_LINE(off) \
{ \
const uint32_t *tmp_src = src; \
uint32_t *tmp_dst = dst; \
for (unsigned x = 0; x < width2; x += 8, tmp_src += 8, tmp_dst += 32) \
{ \
tmp_dst[ 0 + off] = RGB15toRGB5A3(tmp_src[0]); \
tmp_dst[ 1 + off] = RGB15toRGB5A3(tmp_src[1]); \
tmp_dst[ 8 + off] = RGB15toRGB5A3(tmp_src[2]); \
tmp_dst[ 9 + off] = RGB15toRGB5A3(tmp_src[3]); \
tmp_dst[16 + off] = RGB15toRGB5A3(tmp_src[4]); \
tmp_dst[17 + off] = RGB15toRGB5A3(tmp_src[5]); \
tmp_dst[24 + off] = RGB15toRGB5A3(tmp_src[6]); \
tmp_dst[25 + off] = RGB15toRGB5A3(tmp_src[7]); \
} \
src += pitch; \
}
#define BLIT_16(x) \
{ \
block[0 + 0 ] = line[x][0]; \
block[0 + 16] = line[x][1]; \
block[1 + 0 ] = line[x][2]; \
block[1 + 16] = line[x][3]; \
block[2 + 0 ] = line[x][4]; \
block[2 + 16] = line[x][5]; \
block[3 + 0 ] = line[x][6]; \
block[3 + 16] = line[x][7]; \
block += 4; \
line[x] += 8; \
}
static void update_texture(const uint32_t *src,
unsigned width, unsigned height, unsigned pitch)
{
gx_video_t *gx = (gx_video_t*)driver.video_data;
#ifdef ASM_BLITTER
if (width && height && !(width & 3) && !(height & 3))
{
update_texture_asm(src, width, height, pitch);
}
else
#endif
{
pitch >>= 2;
width &= ~15;
height &= ~3;
unsigned width2 = width >> 1;
// Texture data is 4x4 tiled @ 15bpp.
// Use 32-bit to transfer more data per cycle.
uint32_t *dst = g_tex.data;
for (unsigned i = 0; i < height; i += 4, dst += 4 * width2)
{
BLIT_LINE(0)
BLIT_LINE(2)
BLIT_LINE(4)
BLIT_LINE(6)
}
}
if(gx->menu_render)
{
uint16_t *block = (uint16_t *) menu_tex.data;
uint16_t *line[4];
for (uint32_t y = 0; y < 240; y += 4)
{
uint32_t *menu_data = gx->menu_data;
// fetch the next 4 scanlines
line[0] = (uint16_t *) &menu_data[(y + 0) * 320];
line[1] = (uint16_t *) &menu_data[(y + 1) * 320];
line[2] = (uint16_t *) &menu_data[(y + 2) * 320];
line[3] = (uint16_t *) &menu_data[(y + 3) * 320];
for (unsigned x = 0; x < 320; x += 4)
{
BLIT_16(0)
BLIT_16(1)
BLIT_16(2)
BLIT_16(3)
block += 16;
}
}
}
init_texture(width, height);
DCFlushRange(g_tex.data, sizeof(g_tex.data));
DCFlushRange(menu_tex.data, sizeof(menu_tex.data));
GX_InvalidateTexAll();
}
static void gx_resize(gx_video_t *gx)
{
int x = 0, y = 0;
unsigned width = gx->win_width, height = gx->win_height;
#ifdef HW_RVL
VIDEO_SetTrapFilter(g_console.soft_display_filter_enable);
#endif
GX_SetDispCopyGamma(g_console.gamma_correction);
if (gx->keep_aspect)
{
float desired_aspect = g_settings.video.aspect_ratio;
if (desired_aspect == 0.0)
desired_aspect = 1.0;
float device_aspect = CONF_GetAspectRatio() == CONF_ASPECT_4_3 ? 4.0 / 3.0 : 16.0 / 9.0;
if (g_orientation == ORIENTATION_VERTICAL || g_orientation == ORIENTATION_FLIPPED_ROTATED)
desired_aspect = 1.0 / desired_aspect;
float delta;
#ifdef RARCH_CONSOLE
if (g_console.aspect_ratio_index == ASPECT_RATIO_CUSTOM)
{
if (!g_console.viewports.custom_vp.width || !g_console.viewports.custom_vp.height)
{
g_console.viewports.custom_vp.x = 0;
g_console.viewports.custom_vp.y = 0;
g_console.viewports.custom_vp.width = gx->win_width;
g_console.viewports.custom_vp.height = gx->win_height;
}
x = g_console.viewports.custom_vp.x;
y = g_console.viewports.custom_vp.y;
width = g_console.viewports.custom_vp.width;
height = g_console.viewports.custom_vp.height;
}
else
#endif
{
if (fabs(device_aspect - desired_aspect) < 0.0001)
{
// If the aspect ratios of screen and desired aspect ratio are sufficiently equal (floating point stuff),
// assume they are actually equal.
}
else if (device_aspect > desired_aspect)
{
delta = (desired_aspect / device_aspect - 1.0) / 2.0 + 0.5;
x = (unsigned)(width * (0.5 - delta));
width = (unsigned)(2.0 * width * delta);
}
else
{
delta = (device_aspect / desired_aspect - 1.0) / 2.0 + 0.5;
y = (unsigned)(height * (0.5 - delta));
height = (unsigned)(2.0 * height * delta);
}
}
}
GX_SetViewport(x, y, width, height, 0, 1);
Mtx44 m1, m2;
float top = 1, bottom = -1, left = -1, right = 1;
if (g_console.overscan_enable)
{
top -= g_console.overscan_amount / 2;
left += g_console.overscan_amount / 2;
right -= g_console.overscan_amount / 2;
bottom += g_console.overscan_amount / 2;
}
guOrtho(m1, top, bottom, left, right, 0, 1);
unsigned degrees;
switch(g_orientation)
{
case ORIENTATION_VERTICAL:
degrees = 90;
break;
case ORIENTATION_FLIPPED:
degrees = 180;
break;
case ORIENTATION_FLIPPED_ROTATED:
degrees = 270;
break;
default:
degrees = 0;
break;
}
guMtxIdentity(m2);
guMtxRotDeg(m2, 'Z', degrees);
guMtxConcat(m1, m2, m1);
GX_LoadPosMtxImm(m1, GX_PNMTX0);
gx->should_resize = false;
}
static bool gx_frame(void *data, const void *frame,
unsigned width, unsigned height, unsigned pitch,
const char *msg)
{
gx_video_t *gx = (gx_video_t*)driver.video_data;
bool menu_render = gx->menu_render;
bool should_resize = gx->should_resize;
(void)data;
if (msg)
snprintf(gx->msg, sizeof(gx->msg), "%s", msg);
else
gx->msg[0] = 0;
if(!frame && !menu_render)
return true;
gx->frame_count++;
if(should_resize)
{
gx_resize(gx);
}
while ((g_vsync || menu_render) && !g_draw_done)
LWP_ThreadSleep(g_video_cond);
g_draw_done = false;
g_current_framebuf ^= 1;
update_texture(frame, width, height, pitch);
if (frame)
{
GX_LoadTexObj(&g_tex.obj, GX_TEXMAP0);
GX_CallDispList(display_list, display_list_size);
GX_DrawDone();
}
if(menu_render)
{
GX_LoadTexObj(&menu_tex.obj, GX_TEXMAP0);
GX_CallDispList(display_list, display_list_size);
GX_DrawDone();
}
GX_CopyDisp(g_framebuf[g_current_framebuf], GX_TRUE);
GX_Flush();
VIDEO_SetNextFramebuffer(g_framebuf[g_current_framebuf]);
VIDEO_Flush();
return true;
}
static void gx_set_nonblock_state(void *data, bool state)
{
(void)data;
g_vsync = !state;
}
static bool gx_alive(void *data)
{
(void)data;
return true;
}
static bool gx_focus(void *data)
{
(void)data;
return true;
}
static void gx_free(void *data)
{
(void)data;
}
static void gx_set_rotation(void * data, unsigned orientation)
{
(void)data;
gx_video_t *gx = (gx_video_t*)driver.video_data;
g_orientation = orientation;
gx->should_resize = true;
}
static void gx_apply_state_changes(void)
{
gx_video_t *gx = (gx_video_t*)driver.video_data;
gx->should_resize = true;
}
const video_driver_t video_gx = {
.init = gx_init,
.frame = gx_frame,
.alive = gx_alive,
.set_nonblock_state = gx_set_nonblock_state,
.focus = gx_focus,
.free = gx_free,
.ident = "gx",
.set_rotation = gx_set_rotation,
.start = gx_start,
.stop = gx_stop,
.restart = gx_restart,
.apply_state_changes = gx_apply_state_changes,
};
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