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gl: Add fallback for missing subimage unpacking

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For GLES 2.0 platforms with the subimage unpacking extension we need to
upload one row of the image surface at a time.
This commit is contained in:
Emmanuele Bassi 2016-04-25 10:31:51 +01:00
parent 88fed84d45
commit 1379b4b175
1 changed files with 23 additions and 5 deletions
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28
gdk/gdkglcontext.c
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@ -248,14 +248,13 @@ gdk_gl_context_upload_texture (GdkGLContext *context,
/* GL_UNPACK_ROW_LENGTH is available on desktop GL, OpenGL ES >= 3.0, or if /* GL_UNPACK_ROW_LENGTH is available on desktop GL, OpenGL ES >= 3.0, or if
* the GL_EXT_unpack_subimage extension for OpenGL ES 2.0 is available * the GL_EXT_unpack_subimage extension for OpenGL ES 2.0 is available
*/ */
if (!gdk_gl_context_get_use_es (context) || if (!priv->use_es ||
(gdk_gl_context_get_use_es (context) && (priv->use_es && (priv->gl_version >= 30 || priv->has_unpack_subimage)))
(priv->gl_version >= 30 || priv->has_unpack_subimage)))
{ {
glPixelStorei (GL_UNPACK_ALIGNMENT, 4); glPixelStorei (GL_UNPACK_ALIGNMENT, 4);
glPixelStorei (GL_UNPACK_ROW_LENGTH, cairo_image_surface_get_stride (image_surface) / 4); glPixelStorei (GL_UNPACK_ROW_LENGTH, cairo_image_surface_get_stride (image_surface) / 4);
if (gdk_gl_context_get_use_es (context)) if (priv->use_es)
glTexImage2D (texture_target, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, glTexImage2D (texture_target, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
cairo_image_surface_get_data (image_surface)); cairo_image_surface_get_data (image_surface));
else else
@ -265,7 +264,26 @@ gdk_gl_context_upload_texture (GdkGLContext *context,
glPixelStorei (GL_UNPACK_ROW_LENGTH, 0); glPixelStorei (GL_UNPACK_ROW_LENGTH, 0);
} }
else else
g_critical ("Unable to upload the contents of the image surface"); {
GLvoid *data = cairo_image_surface_get_data (image_surface);
int stride = cairo_image_surface_get_stride (image_surface);
int i;
if (priv->use_es)
{
glTexImage2D (texture_target, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
for (i = 0; i < height; i++)
glTexSubImage2D (texture_target, 0, 0, i, width, 1, GL_RGBA, GL_UNSIGNED_BYTE, data + (i * stride));
}
else
{
glTexImage2D (texture_target, 0, GL_RGBA, width, height, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
for (i = 0; i < height; i++)
glTexSubImage2D (texture_target, 0, 0, i, width, 1, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, data + (i * stride));
}
}
} }
static void static void