Commit graph

8 commits

Author SHA1 Message Date
Sam Lantinga
2a5e664b39 Fixed bug 2158 - Pixel missing in SDL_RenderDrawLines
Sean McKean

I am running Ubuntu 12.04 (GL version 1.4 Mesa 8.0.4) , and on drawing a set of lines through the renderer through SDL_RenderDrawLines() (looped or not) or SDL_RenderDrawRect() I notice a pixel missing. For RenderDrawLines() it seems to be the second point in the sequence; for RenderDrawRect() it is the lower-right. This can be fixed by specifying SDL_RenderDrawPoint(s), but wouldn't it be easier to specify each pixel in a GL_POINTS glBegin/End loop in the OpenGL code, just to make sure?

I also ran the same program on Android; the rendering seemed to be correct, which uses glDrawArrays.
2013-10-20 10:10:14 -07:00
Sam Lantinga
32188834b5 Updated blend semantics so blending uses the following formula:
dstRGB = (srcRGB * srcA) + (dstRGB * (1-srcA))
    dstA = srcA + (dstA * (1-srcA))
This allows proper compositing semantics without requiring premultiplied alpha.

Needs full unit test coverage and bug fixes!
2013-07-23 08:06:49 -07:00
Sam Lantinga
91ff680aa5 Fixed bug 1837 - Use error extension instead of glGetError()
Implemented support for GL_ARB_debug_output, but was unable to test it on Mac OS X.
2013-05-19 22:28:10 -07:00
Philipp Wiesemann
d7cb8fc61f Corrected spelling in internal include file. 2013-05-12 13:02:07 +02:00
Sam Lantinga
f366b098d4 Added SDL_RenderSetScale() and SDL_RenderGetScale() 2012-10-01 20:59:33 -07:00
Gabriel Jacobo
17bdcc6e8e RenderCopyEx,rotation and flipping for all hardware/software backends (#1308) 2012-06-01 19:51:08 -03:00
Sam Lantinga
8253658837 Added function SDL_RenderSetClipRect() 2011-02-07 20:06:26 -08:00
Sam Lantinga
58e9ea986f Fixed building on Android, added SDL_opengles2.h, removed unnecessary SDL_glesfuncs.h
--HG--
rename : src/video/SDL_glfuncs.h => src/render/opengl/SDL_glfuncs.h
2011-02-06 02:35:14 -08:00
Renamed from src/video/SDL_glfuncs.h (Browse further)