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Simple Directmedia Layer
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Sam Lantinga b7ede6cc47 Fixed bug 1550 - SDL_RenderCopy/CopyEx in software should optionally render 8bit alpha 
Adam M.

There are three problems in the code that I see.
1. SW_RenderCopyEx enables a color key on surface_scaled even if the source surface didn't have a color key.
2. SW_RenderCopyEx doesn't copy blend mode, color mod, or alpha mod from src to surface_scaled.
3. When SDL_BlitScaled(src, srcrect, surface_scaled, &tmp_rect) is called, it blends the src pixels into surface_scaled instead of overwriting them (if src has blending, etc. enabled).

I've attached a patch that 1) fixes the three problems that I mentioned, 2) adds the requested performance improvement of using the regular blit function if no rotation or flipping is needed, 3) avoids cloning the source surface if no stretching is required, and simplifies the rotation code slightly.
 		2015-06-19 23:20:43 -07:00
VisualC Only use explicit inlining - otherwise Visual Studio 2010 will inline SDL_zero(info) in SDL_vsnprintf() into a memset() call when compiling the Release x64 configuration. 2015-06-14 18:57:05 -07:00
VisualC-WinRT Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
Xcode Updated the copyright year to 2015 2015-05-26 06:27:46 -07:00
Xcode-iOS Fixed building test programs on the iOS simulator 2015-05-28 18:57:57 -07:00
acinclude Fix a libtool issue with some mingw-w64 cross compilers (thanks, Ozkan!). 2015-05-26 19:54:06 -04:00
android-project Fixed bug 2949 - [Android] Virtual DPAD remote not registered 2015-06-16 23:58:09 -07:00
build-scripts WinRT: made sure build script generates Release-built binaries, by default 2015-06-14 20:15:36 -04:00
cmake configure/cmake/x11: Removed SDL_VIDEO_DRIVER_X11_CONST_PARAM_XDATA32 test. 2015-06-08 01:13:51 -04:00
debian Updated the copyright year to 2015 2015-05-26 06:27:46 -07:00
docs Moving some whitespace around to test something on the Mercurial server. 2015-06-18 00:44:57 -04:00
include Removed Edgar's name from SDL_haptic.h at his request. 2015-06-17 12:59:12 -04:00
premake X11: Add Xdbe support to message boxes (thanks, Melker!). 2015-05-28 00:30:21 -04:00
src Fixed bug 1550 - SDL_RenderCopy/CopyEx in software should optionally render 8bit alpha 2015-06-19 23:20:43 -07:00
test Fixed comment in test program. 2015-06-16 20:27:01 +02:00
visualtest Updated the copyright year to 2015 2015-05-26 06:27:46 -07:00
.hgignore Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
Android.mk Android: Replaced spaces with tab in Android.mk file. 2015-05-06 21:11:06 +02:00
BUGS.txt Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
CMakeLists.txt CMake fixes for MingW (thanks, Ozkan!). 2015-06-18 22:34:39 -04:00
COPYING.txt Updated the copyright year to 2015 2015-05-26 06:27:46 -07:00
CREDITS.txt Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
INSTALL.txt Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
Makefile.in Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
Makefile.minimal Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
Makefile.pandora Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
Makefile.psp Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
Makefile.wiz Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
README-SDL.txt Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
README.txt Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
SDL2.spec.in Fixed docs path in RPM .spec file. 2015-06-04 19:05:01 -04:00
TODO.txt Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
VisualC.html Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
WhatsNew.txt Added more entries and brackets to WhatsNew.txt for 2.0.4. 2015-06-19 21:17:00 +02:00
autogen.sh Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
cmake_uninstall.cmake.in Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
configure Updated configure script. 2015-06-08 01:17:58 -04:00
configure.in configure/cmake/x11: Removed SDL_VIDEO_DRIVER_X11_CONST_PARAM_XDATA32 test. 2015-06-08 01:13:51 -04:00
sdl2-config.in Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
sdl2.m4 Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00
sdl2.pc.in Windows: Always set the system timer resolution to 1ms by default. 2015-04-20 12:22:44 -04:00

README.txt 

                         Simple DirectMedia Layer

                                  (SDL)

                                Version 2.0

---
http://www.libsdl.org/

Simple DirectMedia Layer is a cross-platform development library designed
to provide low level access to audio, keyboard, mouse, joystick, and graphics
hardware via OpenGL and Direct3D. It is used by video playback software,
emulators, and popular games including Valve's award winning catalog
and many Humble Bundle games.

More extensive documentation is available in the docs directory, starting
with README.md

Enjoy!
	Sam Lantinga				(slouken@libsdl.org)