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RetroArch/gfx/vg.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2012-2014 - 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 <math.h>
#include <VG/openvg.h>
#include <VG/vgext.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include "gfx_context.h"
#include "math/matrix_3x3.h"
#include "../libretro.h"
#include "../general.h"
#include "../driver.h"
#include "../performance.h"
#include "fonts/fonts.h"
#include "../file.h"
typedef struct
{
const gfx_ctx_driver_t *driver;
uint32_t mScreenWidth;
uint32_t mScreenHeight;
bool should_resize;
float mScreenAspect;
bool mKeepAspect;
bool mEglImageBuf;
unsigned mTextureWidth;
unsigned mTextureHeight;
unsigned mRenderWidth;
unsigned mRenderHeight;
unsigned x1, y1, x2, y2;
VGImageFormat mTexType;
VGImage mImage;
math_matrix_3x3 mTransformMatrix;
VGint scissor[4];
EGLImageKHR last_egl_image;
char *mLastMsg;
uint32_t mFontHeight;
VGFont mFont;
void *mFontRenderer;
const font_renderer_driver_t *font_driver;
bool mFontsOn;
VGuint mMsgLength;
VGuint mGlyphIndices[1024];
VGPaint mPaintFg;
VGPaint mPaintBg;
} vg_t;
static PFNVGCREATEEGLIMAGETARGETKHRPROC pvgCreateEGLImageTargetKHR;
static void vg_set_nonblock_state(void *data, bool state)
{
vg_t *vg = (vg_t*)data;
vg->driver->swap_interval(vg, state ? 0 : 1);
}
static inline bool vg_query_extension(const char *ext)
{
const char *str = (const char*)vgGetString(VG_EXTENSIONS);
bool ret = str && strstr(str, ext);
RARCH_LOG("Querying VG extension: %s => %s\n",
ext, ret ? "exists" : "doesn't exist");
return ret;
}
static void *vg_init(const video_info_t *video, const input_driver_t **input, void **input_data)
{
vg_t *vg = (vg_t*)calloc(1, sizeof(vg_t));
if (!vg)
return NULL;
vg->driver = gfx_ctx_init_first(vg, GFX_CTX_OPENVG_API, 0, 0, false);
if (!vg->driver)
{
free(vg);
return NULL;
}
vg->driver->get_video_size(vg, &vg->mScreenWidth, &vg->mScreenHeight);
RARCH_LOG("Detecting screen resolution %ux%u.\n", vg->mScreenWidth, vg->mScreenHeight);
vg->driver->swap_interval(vg, video->vsync ? 1 : 0);
vg->driver->update_window_title(vg);
vg->mTexType = video->rgb32 ? VG_sXRGB_8888 : VG_sRGB_565;
vg->mKeepAspect = video->force_aspect;
unsigned win_width = video->width;
unsigned win_height = video->height;
if (video->fullscreen && (win_width == 0) && (win_height == 0))
{
win_width = vg->mScreenWidth;
win_height = vg->mScreenHeight;
}
if (!vg->driver->set_video_mode(vg, win_width, win_height, video->fullscreen))
{
free(vg);
return NULL;
}
vg->driver->get_video_size(vg, &vg->mScreenWidth, &vg->mScreenHeight);
RARCH_LOG("Verified window resolution %ux%u.\n", vg->mScreenWidth, vg->mScreenHeight);
vg->should_resize = true;
if (vg->driver->translate_aspect)
vg->mScreenAspect = vg->driver->translate_aspect(vg, vg->mScreenWidth, vg->mScreenHeight);
else
vg->mScreenAspect = (float)vg->mScreenWidth / vg->mScreenHeight;
VGfloat clearColor[4] = {0, 0, 0, 1};
vgSetfv(VG_CLEAR_COLOR, 4, clearColor);
vg->mTextureWidth = vg->mTextureHeight = video->input_scale * RARCH_SCALE_BASE;
vg->mImage = vgCreateImage(vg->mTexType, vg->mTextureWidth, vg->mTextureHeight,
video->smooth ? VG_IMAGE_QUALITY_BETTER : VG_IMAGE_QUALITY_NONANTIALIASED);
vg_set_nonblock_state(vg, !video->vsync);
vg->driver->input_driver(vg, input, input_data);
if (g_settings.video.font_enable && font_renderer_create_default(&vg->font_driver, &vg->mFontRenderer,
*g_settings.video.font_path ? g_settings.video.font_path : NULL, g_settings.video.font_size))
{
vg->mFont = vgCreateFont(0);
if (vg->mFont != VG_INVALID_HANDLE)
{
vg->mFontsOn = true;
vg->mFontHeight = g_settings.video.font_size;
vg->mPaintFg = vgCreatePaint();
vg->mPaintBg = vgCreatePaint();
VGfloat paintFg[] = { g_settings.video.msg_color_r, g_settings.video.msg_color_g, g_settings.video.msg_color_b, 1.0f };
VGfloat paintBg[] = { g_settings.video.msg_color_r / 2.0f, g_settings.video.msg_color_g / 2.0f, g_settings.video.msg_color_b / 2.0f, 0.5f };
vgSetParameteri(vg->mPaintFg, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetParameterfv(vg->mPaintFg, VG_PAINT_COLOR, 4, paintFg);
vgSetParameteri(vg->mPaintBg, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetParameterfv(vg->mPaintBg, VG_PAINT_COLOR, 4, paintBg);
}
}
if (vg_query_extension("KHR_EGL_image") && vg->driver->init_egl_image_buffer(vg, video))
{
pvgCreateEGLImageTargetKHR = (PFNVGCREATEEGLIMAGETARGETKHRPROC)vg->driver->get_proc_address("vgCreateEGLImageTargetKHR");
if (pvgCreateEGLImageTargetKHR)
{
RARCH_LOG("[VG] Using EGLImage buffer\n");
vg->mEglImageBuf = true;
}
}
#if 0
const char *ext = (const char*)vgGetString(VG_EXTENSIONS);
if (ext)
RARCH_LOG("[VG] Supported extensions: %s\n", ext);
#endif
return vg;
}
static void vg_free(void *data)
{
vg_t *vg = (vg_t*)data;
if (!vg)
return;
vgDestroyImage(vg->mImage);
if (vg->mFontsOn)
{
vgDestroyFont(vg->mFont);
vg->font_driver->free(vg->mFontRenderer);
vgDestroyPaint(vg->mPaintFg);
vgDestroyPaint(vg->mPaintBg);
}
vg->driver->destroy(vg);
free(vg);
}
#if 0
static void vg_render_message(vg_t *vg, const char *msg)
{
free(vg->mLastMsg);
vg->mLastMsg = strdup(msg);
if (vg->mMsgLength)
{
while (--vg->mMsgLength)
vgClearGlyph(vg->mFont, vg->mMsgLength);
vgClearGlyph(vg->mFont, 0);
}
struct font_output_list out;
vg->font_driver->render_msg(vg->mFontRenderer, msg, &out);
struct font_output *head = out.head;
while (head)
{
if (vg->mMsgLength >= 1024)
break;
VGfloat origin[2], escapement[2];
VGImage img;
escapement[0] = head->advance_x;
escapement[1] = head->advance_y;
origin[0] = -head->char_off_x;
origin[1] = -head->char_off_y;
img = vgCreateImage(VG_A_8, head->width, head->height, VG_IMAGE_QUALITY_NONANTIALIASED);
// flip it
for (unsigned i = 0; i < head->height; i++)
vgImageSubData(img, head->output + head->pitch * i, head->pitch, VG_A_8, 0, head->height - i - 1, head->width, 1);
vgSetGlyphToImage(vg->mFont, vg->mMsgLength, img, origin, escapement);
vgDestroyImage(img);
vg->mMsgLength++;
head = head->next;
}
vg->font_driver->free_output(vg->mFontRenderer, &out);
for (unsigned i = 0; i < vg->mMsgLength; i++)
vg->mGlyphIndices[i] = i;
}
static void vg_draw_message(vg_t *vg, const char *msg)
{
if (!vg->mLastMsg || strcmp(vg->mLastMsg, msg))
vg_render_message(vg, msg);
vgSeti(VG_SCISSORING, VG_FALSE);
vgSeti(VG_IMAGE_MODE, VG_DRAW_IMAGE_STENCIL);
VGfloat origins[] = {
vg->mScreenWidth * g_settings.video.msg_pos_x - 2.0f,
vg->mScreenHeight * g_settings.video.msg_pos_y - 2.0f,
};
vgSetfv(VG_GLYPH_ORIGIN, 2, origins);
vgSetPaint(vg->mPaintBg, VG_FILL_PATH);
vgDrawGlyphs(vg->mFont, vg->mMsgLength, vg->mGlyphIndices, NULL, NULL, VG_FILL_PATH, VG_TRUE);
origins[0] += 2.0f;
origins[1] += 2.0f;
vgSetfv(VG_GLYPH_ORIGIN, 2, origins);
vgSetPaint(vg->mPaintFg, VG_FILL_PATH);
vgDrawGlyphs(vg->mFont, vg->mMsgLength, vg->mGlyphIndices, NULL, NULL, VG_FILL_PATH, VG_TRUE);
vgSeti(VG_SCISSORING, VG_TRUE);
vgSeti(VG_IMAGE_MODE, VG_DRAW_IMAGE_NORMAL);
}
#endif
static void vg_calculate_quad(vg_t *vg)
{
// set viewport for aspect ratio, taken from the OpenGL driver
if (vg->mKeepAspect)
{
float desired_aspect = g_extern.system.aspect_ratio;
// If the aspect ratios of screen and desired aspect ratio are sufficiently equal (floating point stuff),
// assume they are actually equal.
if (fabs(vg->mScreenAspect - desired_aspect) < 0.0001)
{
vg->x1 = 0;
vg->y1 = 0;
vg->x2 = vg->mScreenWidth;
vg->y2 = vg->mScreenHeight;
}
else if (vg->mScreenAspect > desired_aspect)
{
float delta = (desired_aspect / vg->mScreenAspect - 1.0) / 2.0 + 0.5;
vg->x1 = vg->mScreenWidth * (0.5 - delta);
vg->y1 = 0;
vg->x2 = 2.0 * vg->mScreenWidth * delta + vg->x1;
vg->y2 = vg->mScreenHeight + vg->y1;
}
else
{
float delta = (vg->mScreenAspect / desired_aspect - 1.0) / 2.0 + 0.5;
vg->x1 = 0;
vg->y1 = vg->mScreenHeight * (0.5 - delta);
vg->x2 = vg->mScreenWidth + vg->x1;
vg->y2 = 2.0 * vg->mScreenHeight * delta + vg->y1;
}
}
else
{
vg->x1 = 0;
vg->y1 = 0;
vg->x2 = vg->mScreenWidth;
vg->y2 = vg->mScreenHeight;
}
vg->scissor[0] = vg->x1;
vg->scissor[1] = vg->y1;
vg->scissor[2] = vg->x2 - vg->x1;
vg->scissor[3] = vg->y2 - vg->y1;
vgSetiv(VG_SCISSOR_RECTS, 4, vg->scissor);
}
static void vg_copy_frame(void *data, const void *frame, unsigned width, unsigned height, unsigned pitch)
{
vg_t *vg = (vg_t*)data;
if (vg->mEglImageBuf)
{
EGLImageKHR img = 0;
bool new_egl = vg->driver->write_egl_image(vg, frame, width, height, pitch, (vg->mTexType == VG_sXRGB_8888), 0, &img);
rarch_assert(img != EGL_NO_IMAGE_KHR);
if (new_egl)
{
vgDestroyImage(vg->mImage);
vg->mImage = pvgCreateEGLImageTargetKHR((VGeglImageKHR) img);
if (!vg->mImage)
{
RARCH_ERR("[VG:EGLImage] Error creating image: %08x\n", vgGetError());
exit(2);
}
vg->last_egl_image = img;
}
}
else
{
vgImageSubData(vg->mImage, frame, pitch, vg->mTexType, 0, 0, width, height);
}
}
static bool vg_frame(void *data, const void *frame, unsigned width, unsigned height, unsigned pitch, const char *msg)
{
RARCH_PERFORMANCE_INIT(vg_fr);
RARCH_PERFORMANCE_START(vg_fr);
vg_t *vg = (vg_t*)data;
if (width != vg->mRenderWidth || height != vg->mRenderHeight || vg->should_resize)
{
vg->mRenderWidth = width;
vg->mRenderHeight = height;
vg_calculate_quad(vg);
matrix_3x3_quad_to_quad(
vg->x1, vg->y1, vg->x2, vg->y1, vg->x2, vg->y2, vg->x1, vg->y2,
// needs to be flipped, Khronos loves their bottom-left origin
0, height, width, height, width, 0, 0, 0,
&vg->mTransformMatrix);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
vgLoadMatrix(vg->mTransformMatrix.data);
vg->should_resize = false;
}
vgSeti(VG_SCISSORING, VG_FALSE);
vgClear(0, 0, vg->mScreenWidth, vg->mScreenHeight);
vgSeti(VG_SCISSORING, VG_TRUE);
RARCH_PERFORMANCE_INIT(vg_image);
RARCH_PERFORMANCE_START(vg_image);
vg_copy_frame(vg, frame, width, height, pitch);
RARCH_PERFORMANCE_STOP(vg_image);
vgDrawImage(vg->mImage);
#if 0
if (msg && vg->mFontsOn)
vg_draw_message(vg, msg);
#endif
vg->driver->update_window_title(vg);
RARCH_PERFORMANCE_STOP(vg_fr);
vg->driver->swap_buffers(vg);
return true;
}
static bool vg_alive(void *data)
{
vg_t *vg = (vg_t*)data;
bool quit;
vg->driver->check_window(vg, &quit,
&vg->should_resize, &vg->mScreenWidth, &vg->mScreenHeight,
g_extern.frame_count);
return !quit;
}
static bool vg_focus(void *data)
{
vg_t *vg = (vg_t*)data;
if (vg && vg->driver)
return vg->driver->has_focus(vg);
return false;
}
static bool vg_has_windowed(void *data)
{
vg_t *vg = (vg_t*)data;
if (vg && vg->driver)
return vg->driver->has_windowed(vg);
return true;
}
static bool vg_set_shader(void *data,
enum rarch_shader_type type, const char *path)
{
(void)data;
(void)type;
(void)path;
return false;
}
static void vg_set_rotation(void *data, unsigned rotation)
{
(void)data;
(void)rotation;
}
static void vg_viewport_info(void *data,
struct rarch_viewport *vp)
{
(void)data;
(void)vp;
}
static bool vg_read_viewport(void *data, uint8_t *buffer)
{
(void)data;
(void)buffer;
return true;
}
static void vg_get_poke_interface(void *data,
const video_poke_interface_t **iface)
{
(void)data;
(void)iface;
}
video_driver_t video_vg = {
vg_init,
vg_frame,
vg_set_nonblock_state,
vg_alive,
vg_focus,
vg_has_windowed,
vg_set_shader,
vg_free,
"vg",
vg_set_rotation,
vg_viewport_info,
vg_read_viewport,
#ifdef HAVE_OVERLAY
NULL, /* overlay_interface */
#endif
vg_get_poke_interface
};
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