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vo_gl: implement screenshots

This commit is contained in:
wm4 2011-10-06 20:46:01 +02:00 committed by Uoti Urpala
parent 0440460d0c
commit 28eaf11cf3
3 changed files with 80 additions and 0 deletions
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19
libvo/gl_common.c
View File

@ -71,6 +71,7 @@ void glAdjustAlignment(GL *gl, int stride)
else
gl_alignment = 1;
gl->PixelStorei(GL_UNPACK_ALIGNMENT, gl_alignment);
gl->PixelStorei(GL_PACK_ALIGNMENT, gl_alignment);
}
struct gl_name_map_struct {
@ -634,6 +635,24 @@ void glUploadTex(GL *gl, GLenum target, GLenum format, GLenum type,
gl->TexSubImage2D(target, 0, x, y, w, y_max - y, format, type, data);
}
/**
* \brief download a texture, handling things like stride and slices
* \param target texture target, usually GL_TEXTURE_2D
* \param format OpenGL format of data
* \param type OpenGL type of data
* \param dataptr destination memory for download
* \param stride data stride (must be positive)
* \ingroup gltexture
*/
void glDownloadTex(GL *gl, GLenum target, GLenum format, GLenum type,
void *dataptr, int stride)
{
// this is not always correct, but should work for MPlayer
glAdjustAlignment(gl, stride);
gl->PixelStorei(GL_PACK_ROW_LENGTH, stride / glFmt2bpp(format, type));
gl->GetTexImage(target, 0, format, type, dataptr);
}
/**
* \brief Setup ATI version of register combiners for YUV to RGB conversion.
* \param csp_params parameters used for colorspace conversion

2
libvo/gl_common.h
View File

@ -256,6 +256,8 @@ int glCreatePPMTex(GL *gl, GLenum target, GLenum fmt, GLint filter,
void glUploadTex(GL *gl, GLenum target, GLenum format, GLenum type,
const void *dataptr, int stride,
int x, int y, int w, int h, int slice);
void glDownloadTex(GL *gl, GLenum target, GLenum format, GLenum type,
void *dataptr, int stride);
void glDrawTex(GL *gl, GLfloat x, GLfloat y, GLfloat w, GLfloat h,
GLfloat tx, GLfloat ty, GLfloat tw, GLfloat th,
int sx, int sy, int rect_tex, int is_yv12, int flip);

59
libvo/vo_gl.c
View File

@ -1134,6 +1134,57 @@ skip_upload:
return VO_TRUE;
}
static mp_image_t *get_screenshot(struct vo *vo)
{
struct gl_priv *p = vo->priv;
GL *gl = p->gl;
mp_image_t *image = alloc_mpi(p->texture_width, p->texture_height,
p->image_format);
glDownloadTex(gl, p->target, p->gl_format, p->gl_type, image->planes[0],
image->stride[0]);
if (p->is_yuv) {
gl->ActiveTexture(GL_TEXTURE1);
glDownloadTex(gl, p->target, p->gl_format, p->gl_type, image->planes[1],
image->stride[1]);
gl->ActiveTexture(GL_TEXTURE2);
glDownloadTex(gl, p->target, p->gl_format, p->gl_type, image->planes[2],
image->stride[2]);
gl->ActiveTexture(GL_TEXTURE0);
}
image->width = p->image_width;
image->height = p->image_height;
image->w = p->image_d_width;
image->h = p->image_d_height;
return image;
}
static mp_image_t *get_window_screenshot(struct vo *vo)
{
struct gl_priv *p = vo->priv;
GL *gl = p->gl;
GLint vp[4]; //x, y, w, h
gl->GetIntegerv(GL_VIEWPORT, vp);
mp_image_t *image = alloc_mpi(vp[2], vp[3], IMGFMT_RGB24);
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
gl->PixelStorei(GL_PACK_ALIGNMENT, 0);
gl->PixelStorei(GL_PACK_ROW_LENGTH, 0);
gl->ReadBuffer(GL_FRONT);
//flip image while reading
for (int y = 0; y < vp[3]; y++) {
gl->ReadPixels(vp[0], vp[1] + vp[3] - y - 1, vp[2], 1,
GL_RGB, GL_UNSIGNED_BYTE,
image->planes[0] + y * image->stride[0]);
}
return image;
}
static int query_format(struct vo *vo, uint32_t format)
{
struct gl_priv *p = vo->priv;
@ -1460,6 +1511,14 @@ static int control(struct vo *vo, uint32_t request, void *data)
do_render_osd(vo, 2);
flip_page(vo);
return VO_TRUE;
case VOCTRL_SCREENSHOT: {
struct voctrl_screenshot_args *args = data;
if (args->full_window)
args->out_image = get_window_screenshot(vo);
else
args->out_image = get_screenshot(vo);
return true;
}
}
return VO_NOTIMPL;
}