Various SDL renderer-based renderer updates.

.github/workflows/main.yml

@@ -25,7 +25,7 @@ jobs:
         run: sudo apt update && sudo apt install -y --no-install-recommends $MZXDEPS_DEBIAN_SDL2
       - uses: actions/checkout@v3
       - name: Configure
-        run: ./config.sh --platform unix --enable-release
+        run: ./config.sh --platform unix --enable-release --enable-sdlaccel
       - name: Build
         run: $MZX_MAKE
       - name: Run tests
@@ -48,7 +48,7 @@ jobs:
         run: sudo apt update && sudo apt install -y --no-install-recommends $MZXDEPS_DEBIAN_SDL2
       - uses: actions/checkout@v3
       - name: Configure
-        run: ./config.sh --platform unix-devel --enable-release
+        run: ./config.sh --platform unix-devel --enable-release --enable-sdlaccel
       - name: Build
         run: $MZX_MAKE
       - name: Run tests

config.sh

@@ -93,7 +93,8 @@ usage() {
 	echo "Graphics options:"
 	echo "  --enable-gles             Enable hacks for OpenGL ES platforms."
 	echo "  --disable-software        Disable software renderer."
-	echo "  --disable-softscale       Disable SDL 2 accelerated software renderer."
+	echo "  --disable-softscale       Disable SDL accelerated software renderer."
+	echo "  --enable-sdlaccel         Enable SDL accelerated hardware renderer."
 	echo "  --disable-gl              Disable all GL renderers."
 	echo "  --disable-gl-fixed        Disable GL renderers for fixed-function h/w."
 	echo "  --disable-gl-prog         Disable GL renderers for programmable h/w."
@@ -172,6 +173,7 @@ UTILS="true"
 X11="true"
 SOFTWARE="true"
 SOFTSCALE="true"
+SDLACCEL="false"
 GL_FIXED="true"
 GL_PROGRAM="true"
 OVERLAY="true"
@@ -351,6 +353,9 @@ while [ "$1" != "" ]; do
 	[ "$1" = "--disable-softscale" ] && SOFTSCALE="false"
 	[ "$1" = "--enable-softscale" ]  && SOFTSCALE="true"
 
+	[ "$1" = "--disable-sdlaccel" ] && SDLACCEL="false"
+	[ "$1" = "--enable-sdlaccel" ]  && SDLACCEL="true"
+
 	[ "$1" = "--disable-gl" ] && GL="false"
 	[ "$1" = "--enable-gl" ]  && GL="true"
 
@@ -797,6 +802,7 @@ if [ "$SDL" = "false" ]; then
 	echo "Force-disabling SDL dependent components:"
 	echo " -> SOFTSCALE, OVERLAY"
 	SOFTSCALE="false"
+	SDLACCEL="false"
 	OVERLAY="false"
 else
 	#
@@ -1108,6 +1114,7 @@ fi
 if [ "$SDL" = "1" ] && [ "$SOFTSCALE" = "true" ]; then
 	echo "Force-disabling softscale renderer (requires SDL 2)."
 	SOFTSCALE="false"
+	SDLACCEL="false"
 fi
 
 #
@@ -1522,6 +1529,17 @@ else
 	echo "Softscale renderer disabled."
 fi
 
+#
+# SDL accelerated hardware renderer (SDL 2+)
+#
+if [ "$SDLACCEL" = "true" ]; then
+	echo "SDL accelerated hardware renderer enabled."
+	echo "#define CONFIG_RENDER_SDLACCEL" >> src/config.h
+	echo "BUILD_RENDER_SDLACCEL=1" >> platform.inc
+else
+	echo "SDL accelerated hardware renderer disabled."
+fi
+
 #
 # Fixed-function H/W OpenGL renderers
 #

docs/changelog.txt

@@ -41,6 +41,14 @@ DEVELOPERS
     --disable-sdl (disables SDL).
   For compatibility, "--disable-libsdl2" is still recognized.
 + Added SDL 2 and SDL 1.2 support to the 3DS port. (asie)
++ Updated the "sdlaccel" renderer, which can now be enabled with
+  --enable-sdlaccel in config.sh. This renderer uses the SDL
+  renderer API for hardware rendering and has an experimental
+  threaded charset texture update routine. SMZX isn't currently
+  implemented and it's slow, so it's disabled by default.
++ Moved SDL renderer window creation to render_sdl.c so both of
+  the SDL renderer-based renderers can benefit from it.
++ Removed floating point division usage in render_gl2.c.
 + -Og is now the default debug optimization level (was -O0).
 + Added --enable-lto to enable link-time optimizations.
 + The sanitizer config.sh options can now be used with release

src/Makefile.in

@@ -225,12 +225,17 @@ core_cobjs += ${core_obj}/render_soft.o
 render_layer_software = 1
 endif
 
-# Accelerated SDL2 software renderer
+# Accelerated SDL software renderer
 ifeq (${BUILD_RENDER_SOFTSCALE},1)
 core_cobjs += ${core_obj}/render_softscale.o
 render_layer_software = 1
 endif
 
+# Accelerated SDL fixed function hardware renderer
+ifeq (${BUILD_RENDER_SDLACCEL},1)
+core_cobjs += ${core_obj}/render_sdlaccel.o
+endif
+
 # GL shared
 ifneq ($(or ${BUILD_RENDER_GL_FIXED},${BUILD_RENDER_GL_PROGRAM}),)
 core_cobjs += ${core_obj}/render_gl.o

src/graphics.c

@@ -66,6 +66,9 @@ static const struct renderer_data renderers[] =
 #if defined(CONFIG_RENDER_SOFTSCALE)
   { "softscale", render_softscale_register },
 #endif
+#if defined(CONFIG_RENDER_SDLACCEL)
+  { "sdlaccel", render_sdlaccel_register },
+#endif
 #if defined(CONFIG_RENDER_GL_FIXED)
   { "opengl1", render_gl1_register },
   { "opengl2", render_gl2_register },