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Use GL_NEAREST filter in the draw-and-read get_data texture fallback

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The fallback for when glGetTexImage is not available renders the
texture to the framebuffer to read the data using glReadPixels. This
patch just sets the COGL_MATERIAL_FILTER_NEAREST filter mode on the
material before rendering to avoid linear filtering which would alter
the texture data.
This commit is contained in:
Neil Roberts 2010-07-08 18:31:29 +01:00
parent f8d1955ab7
commit d3ea1ec6f8
1 changed files with 4 additions and 0 deletions
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4
cogl/cogl-texture.c
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@ -1060,6 +1060,10 @@ _cogl_texture_draw_and_read (CoglHandle handle,
"RGBA = REPLACE (TEXTURE)",
NULL);
cogl_material_set_layer_filters (ctx->texture_download_material, 0,
COGL_MATERIAL_FILTER_NEAREST,
COGL_MATERIAL_FILTER_NEAREST);
do_texture_draw_and_read (handle, target_bmp, viewport);
/* Check whether texture has alpha and framebuffer not */