This problem has been reported by raph_82@hotmail.com with this sample document <https://bugs.freedesktop.org/attachment.cgi?id=50017> (accidently attached in "Bug 36766 - [Task] Gradient and Transparency issues") Steps to reproduce: 1. Open test document First slide seems to be completely black (with some white test at the top) 2. Start presentation mode Expected: First slide completely black (with some white test at the top) Actual: a Ghost smiley picture I see that with "LibreOffice 3.4.2 - WIN7 Home Premium (64bit) German UI [OOO340m1 (Build:203)]", also with "LibreOffice Portable 3.3.3 - WIN7 Home Premium (64bit) German UI [OOO330m19 (Build:301 Tag 3.3.3.1)]" OOo 3.1.1 does not show anything on slide 1, not in edit mode, not in presentation mode. An sample document concerning a similar (or the same) problem you find here <https://bugs.freedesktop.org/attachment.cgi?id=44974> in Bug 35681, attention, that one might have a wrong subject line. @Fabian, Raphaël: Can you find out with what version what of the problems started? @Raphaël: How has the sample been created with what software?
The file in attachment was created with LibreOffice 3.4.2 OOO340m1 (Build:203). A way, among others, to reproduce the problem is the following: 1) Draw a shape (circle, square, ghost, ...); 2) Fill it with the color you want (in the attachment I chose black forms on black background to create the mystery, but the problem occurs with every color); 3) Right-click Area -> Transparency -> Gradient All kinds of gradients are concerned (linear, radial, quadratic, ...). The problem was already there in the first release of LibreOffice (3.3.0). But all was ok in OpenOffice 3.2, so probably this bug was introduced during the migration from OpenOffice to LibreOffice.
Created attachment 50024 [details] This file show some issues with transpareny gradients. Note that problems occurs not only with dark background, but as well with white background. See my second attachment (Gradient_test.odp). Moreover, it seems that this strange behavior comes from two different issues: 1) There is a problem in the rendering process (objects with gradients are displayed differently in editing and in presentation mode); 2) Gradients are not always correctly displayed even in editing mode. See the two rectangles in my second attachment: by increasing the gradient transparency from 10% to 11%, you switch from completely white to completely green. I created and tested this file with LibO 3.4.2, on Windows XP SP3.
Wrong description, it's not a gradient, but color object filling with transparency gradient. This one is a DUP of "Bug 33591 - Area transparency turns gray in presentation mode". Transparent black shape still is black in front of black page background and so it's invisible. That's shown correctly in edit mode. In Presentation mode some grey will be added to the transparency, and that grey makes the shape visible. @Raphaël: Than you for additional information. Please! Do not spread around samples that have nothing to do with the bug report, I have some difficulties to recognize relation of your examples with the bug report subject line "Gradient picture only visible in presentation mode, not in edit mode". So I will delete the attachment in this bug. But of course your sample shows really unexpected and intolerable effects. My tests seem to confirm your expectations in the last sheet, there is a problem (also in DRAW) with transparent gradient color shape fillings if start value and end value are the same, but that's not a Presentation problem, but a DRAW problem. In presentation mode those transparencies are shown correctly. I will check Bugzilla and file a new report using your example, if it's not already reported. *** This bug has been marked as a duplicate of bug 33591 ***
Created attachment 50025 [details] Simple sample created due to Comment 1 Changing background to white you will see the smiley shape
Comment on attachment 50024 [details] This file show some issues with transpareny gradients. Gradient_test.odp is concerning a completely different problem