[vlc-devel] [PATCH 08/24] opengl: extract subpictures rendering
Romain Vimont
rom1v at videolabs.io
Mon Jan 27 21:19:58 CET 2020
Move subpictures rendering to separate functions.
---
modules/video_output/opengl/vout_helper.c | 189 ++++++++++++----------
1 file changed, 104 insertions(+), 85 deletions(-)
diff --git a/modules/video_output/opengl/vout_helper.c b/modules/video_output/opengl/vout_helper.c
index 53cca09f1c..80e47b2948 100644
--- a/modules/video_output/opengl/vout_helper.c
+++ b/modules/video_output/opengl/vout_helper.c
@@ -986,30 +986,17 @@ void vout_display_opengl_Viewport(vout_display_opengl_t *vgl, int x, int y,
vgl->vt.Viewport(x, y, width, height);
}
-int vout_display_opengl_Prepare(vout_display_opengl_t *vgl,
- picture_t *picture, subpicture_t *subpicture)
+static int
+vout_display_opengl_PrepareSubPicture(vout_display_opengl_t *vgl,
+ subpicture_t *subpicture)
{
- GL_ASSERT_NOERROR();
-
- opengl_tex_converter_t *tc = vgl->prgm->tc;
+ opengl_tex_converter_t *tc = vgl->sub_prgm->tc;
const struct vlc_gl_interop *interop = tc->interop;
- /* Update the texture */
- int ret = interop->ops->update_textures(interop, vgl->texture, vgl->tex_width, vgl->tex_height,
- picture, NULL);
- if (ret != VLC_SUCCESS)
- return ret;
-
- int last_count = vgl->region_count;
+ int last_count = vgl->region_count;
gl_region_t *last = vgl->region;
- vgl->region_count = 0;
- vgl->region = NULL;
-
- tc = vgl->sub_prgm->tc;
- interop = tc->interop;
if (subpicture) {
-
int count = 0;
for (subpicture_region_t *r = subpicture->p_region; r; r = r->p_next)
count++;
@@ -1019,7 +1006,7 @@ int vout_display_opengl_Prepare(vout_display_opengl_t *vgl,
int i = 0;
for (subpicture_region_t *r = subpicture->p_region;
- r && ret == VLC_SUCCESS; r = r->p_next, i++) {
+ r; r = r->p_next, i++) {
gl_region_t *glr = &vgl->region[i];
glr->width = r->fmt.i_visible_width;
@@ -1058,26 +1045,50 @@ int vout_display_opengl_Prepare(vout_display_opengl_t *vgl,
if (!glr->texture)
{
/* Could not recycle a previous texture, generate a new one. */
- ret = GenTextures(interop, &glr->width, &glr->height, &glr->texture);
+ int ret = GenTextures(interop, &glr->width, &glr->height, &glr->texture);
if (ret != VLC_SUCCESS)
- continue;
+ break;
}
/* Use the visible pitch of the region */
r->p_picture->p[0].i_visible_pitch = r->fmt.i_visible_width
* r->p_picture->p[0].i_pixel_pitch;
- ret = interop->ops->update_textures(interop, &glr->texture,
- &glr->width, &glr->height,
- r->p_picture, &pixels_offset);
+ int ret = interop->ops->update_textures(interop, &glr->texture,
+ &glr->width, &glr->height,
+ r->p_picture, &pixels_offset);
+ if (ret != VLC_SUCCESS)
+ break;
}
}
+ else
+ {
+ vgl->region_count = 0;
+ vgl->region = NULL;
+ }
+
for (int i = 0; i < last_count; i++) {
if (last[i].texture)
DelTextures(interop, &last[i].texture);
}
free(last);
- VLC_UNUSED(subpicture);
+ return VLC_SUCCESS;
+}
+
+int vout_display_opengl_Prepare(vout_display_opengl_t *vgl,
+ picture_t *picture, subpicture_t *subpicture)
+{
+ GL_ASSERT_NOERROR();
+
+ opengl_tex_converter_t *tc = vgl->prgm->tc;
+ const struct vlc_gl_interop *interop = tc->interop;
+ /* Update the texture */
+ int ret = interop->ops->update_textures(interop, vgl->texture, vgl->tex_width, vgl->tex_height,
+ picture, NULL);
+ if (ret != VLC_SUCCESS)
+ return ret;
+
+ ret = vout_display_opengl_PrepareSubPicture(vgl, subpicture);
GL_ASSERT_NOERROR();
return ret;
}
@@ -1510,67 +1521,9 @@ static void TextureCropForStereo(vout_display_opengl_t *vgl,
}
}
-int vout_display_opengl_Display(vout_display_opengl_t *vgl,
- const video_format_t *source)
+static int
+vout_display_opengl_DrawSubPicture(vout_display_opengl_t *vgl)
{
- GL_ASSERT_NOERROR();
-
- /* Why drawing here and not in Render()? Because this way, the
- OpenGL providers can call vout_display_opengl_Display to force redraw.
- Currently, the OS X provider uses it to get a smooth window resizing */
- vgl->vt.Clear(GL_COLOR_BUFFER_BIT);
-
- vgl->vt.UseProgram(vgl->prgm->id);
-
- if (source->i_x_offset != vgl->last_source.i_x_offset
- || source->i_y_offset != vgl->last_source.i_y_offset
- || source->i_visible_width != vgl->last_source.i_visible_width
- || source->i_visible_height != vgl->last_source.i_visible_height)
- {
- float left[PICTURE_PLANE_MAX];
- float top[PICTURE_PLANE_MAX];
- float right[PICTURE_PLANE_MAX];
- float bottom[PICTURE_PLANE_MAX];
- const opengl_tex_converter_t *tc = vgl->prgm->tc;
- const struct vlc_gl_interop *interop = tc->interop;
- for (unsigned j = 0; j < interop->tex_count; j++)
- {
- float scale_w = (float)interop->texs[j].w.num / interop->texs[j].w.den
- / vgl->tex_width[j];
- float scale_h = (float)interop->texs[j].h.num / interop->texs[j].h.den
- / vgl->tex_height[j];
-
- /* Warning: if NPOT is not supported a larger texture is
- allocated. This will cause right and bottom coordinates to
- land on the edge of two texels with the texels to the
- right/bottom uninitialized by the call to
- glTexSubImage2D. This might cause a green line to appear on
- the right/bottom of the display.
- There are two possible solutions:
- - Manually mirror the edges of the texture.
- - Add a "-1" when computing right and bottom, however the
- last row/column might not be displayed at all.
- */
- left[j] = (source->i_x_offset + 0 ) * scale_w;
- top[j] = (source->i_y_offset + 0 ) * scale_h;
- right[j] = (source->i_x_offset + source->i_visible_width ) * scale_w;
- bottom[j] = (source->i_y_offset + source->i_visible_height) * scale_h;
- }
-
- TextureCropForStereo(vgl, left, top, right, bottom);
- int ret = SetupCoords(vgl, left, top, right, bottom);
- if (ret != VLC_SUCCESS)
- return ret;
-
- vgl->last_source.i_x_offset = source->i_x_offset;
- vgl->last_source.i_y_offset = source->i_y_offset;
- vgl->last_source.i_visible_width = source->i_visible_width;
- vgl->last_source.i_visible_height = source->i_visible_height;
- }
- DrawWithShaders(vgl, vgl->prgm);
-
- /* Draw the subpictures */
- // Change the program for overlays
struct prgm *prgm = vgl->sub_prgm;
GLuint program = prgm->id;
opengl_tex_converter_t *tc = prgm->tc;
@@ -1646,6 +1599,72 @@ int vout_display_opengl_Display(vout_display_opengl_t *vgl,
}
vgl->vt.Disable(GL_BLEND);
+ return VLC_SUCCESS;
+}
+
+int vout_display_opengl_Display(vout_display_opengl_t *vgl,
+ const video_format_t *source)
+{
+ GL_ASSERT_NOERROR();
+
+ /* Why drawing here and not in Render()? Because this way, the
+ OpenGL providers can call vout_display_opengl_Display to force redraw.
+ Currently, the OS X provider uses it to get a smooth window resizing */
+ vgl->vt.Clear(GL_COLOR_BUFFER_BIT);
+
+ vgl->vt.UseProgram(vgl->prgm->id);
+
+ if (source->i_x_offset != vgl->last_source.i_x_offset
+ || source->i_y_offset != vgl->last_source.i_y_offset
+ || source->i_visible_width != vgl->last_source.i_visible_width
+ || source->i_visible_height != vgl->last_source.i_visible_height)
+ {
+ float left[PICTURE_PLANE_MAX];
+ float top[PICTURE_PLANE_MAX];
+ float right[PICTURE_PLANE_MAX];
+ float bottom[PICTURE_PLANE_MAX];
+ const opengl_tex_converter_t *tc = vgl->prgm->tc;
+ const struct vlc_gl_interop *interop = tc->interop;
+ for (unsigned j = 0; j < interop->tex_count; j++)
+ {
+ float scale_w = (float)interop->texs[j].w.num / interop->texs[j].w.den
+ / vgl->tex_width[j];
+ float scale_h = (float)interop->texs[j].h.num / interop->texs[j].h.den
+ / vgl->tex_height[j];
+
+ /* Warning: if NPOT is not supported a larger texture is
+ allocated. This will cause right and bottom coordinates to
+ land on the edge of two texels with the texels to the
+ right/bottom uninitialized by the call to
+ glTexSubImage2D. This might cause a green line to appear on
+ the right/bottom of the display.
+ There are two possible solutions:
+ - Manually mirror the edges of the texture.
+ - Add a "-1" when computing right and bottom, however the
+ last row/column might not be displayed at all.
+ */
+ left[j] = (source->i_x_offset + 0 ) * scale_w;
+ top[j] = (source->i_y_offset + 0 ) * scale_h;
+ right[j] = (source->i_x_offset + source->i_visible_width ) * scale_w;
+ bottom[j] = (source->i_y_offset + source->i_visible_height) * scale_h;
+ }
+
+ TextureCropForStereo(vgl, left, top, right, bottom);
+ int ret = SetupCoords(vgl, left, top, right, bottom);
+ if (ret != VLC_SUCCESS)
+ return ret;
+
+ vgl->last_source.i_x_offset = source->i_x_offset;
+ vgl->last_source.i_y_offset = source->i_y_offset;
+ vgl->last_source.i_visible_width = source->i_visible_width;
+ vgl->last_source.i_visible_height = source->i_visible_height;
+ }
+ DrawWithShaders(vgl, vgl->prgm);
+
+ int ret = vout_display_opengl_DrawSubPicture(vgl);
+ if (ret != VLC_SUCCESS)
+ return ret;
+
/* Display */
vlc_gl_Swap(vgl->gl);
--
2.25.0
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