mirror of
https://github.com/libsdl-org/SDL.git
synced 2026-01-06 21:37:47 +00:00
Added SDL_RotateSurface()
Fixes https://github.com/libsdl-org/SDL/issues/14269
This commit is contained in:
Sam Lantinga
@@ -504,7 +504,6 @@
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<ClInclude Include="..\..\src\render\software\SDL_drawline.h" />
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<ClInclude Include="..\..\src\render\software\SDL_drawpoint.h" />
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<ClInclude Include="..\..\src\render\software\SDL_render_sw_c.h" />
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<ClInclude Include="..\..\src\render\software\SDL_rotate.h" />
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<ClInclude Include="..\..\src\render\software\SDL_triangle.h" />
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<ClInclude Include="..\..\src\SDL_assert_c.h" />
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<ClInclude Include="..\..\src\SDL_error_c.h" />
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@@ -604,6 +603,7 @@
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<ClInclude Include="..\..\src\video\SDL_pixels_c.h" />
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<ClInclude Include="..\..\src\video\SDL_rect_c.h" />
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<ClInclude Include="..\..\src\video\SDL_RLEaccel_c.h" />
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<ClInclude Include="..\..\src\video\SDL_rotate.h" />
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<ClInclude Include="..\..\src\video\SDL_stb_c.h" />
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<ClInclude Include="..\..\src\video\SDL_surface_c.h" />
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<ClInclude Include="..\..\src\video\SDL_sysvideo.h" />
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@@ -809,7 +809,6 @@
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<ClCompile Include="..\..\src\render\software\SDL_drawline.c" />
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<ClCompile Include="..\..\src\render\software\SDL_drawpoint.c" />
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<ClCompile Include="..\..\src\render\software\SDL_render_sw.c" />
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<ClCompile Include="..\..\src\render\software\SDL_rotate.c" />
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<ClCompile Include="..\..\src\render\software\SDL_triangle.c" />
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<ClCompile Include="..\..\src\render\vulkan\SDL_render_vulkan.c" />
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<ClCompile Include="..\..\src\render\vulkan\SDL_shaders_vulkan.c" />
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@@ -891,6 +890,7 @@
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<ClCompile Include="..\..\src\video\SDL_pixels.c" />
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<ClCompile Include="..\..\src\video\SDL_rect.c" />
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<ClCompile Include="..\..\src\video\SDL_RLEaccel.c" />
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<ClCompile Include="..\..\src\video\SDL_rotate.c" />
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<ClCompile Include="..\..\src\video\SDL_stb.c" />
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<ClCompile Include="..\..\src\video\SDL_stretch.c" />
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<ClCompile Include="..\..\src\video\SDL_surface.c" />
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@@ -127,7 +127,6 @@
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<ClCompile Include="..\..\src\render\software\SDL_drawline.c" />
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<ClCompile Include="..\..\src\render\software\SDL_drawpoint.c" />
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<ClCompile Include="..\..\src\render\software\SDL_render_sw.c" />
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<ClCompile Include="..\..\src\render\software\SDL_rotate.c" />
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<ClCompile Include="..\..\src\render\software\SDL_triangle.c" />
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<ClCompile Include="..\..\src\SDL.c" />
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<ClCompile Include="..\..\src\SDL_assert.c" />
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@@ -186,6 +185,7 @@
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<ClCompile Include="..\..\src\video\SDL_pixels.c" />
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<ClCompile Include="..\..\src\video\SDL_rect.c" />
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<ClCompile Include="..\..\src\video\SDL_RLEaccel.c" />
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<ClCompile Include="..\..\src\video\SDL_rotate.c" />
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<ClCompile Include="..\..\src\video\SDL_stb.c" />
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<ClCompile Include="..\..\src\video\SDL_stretch.c" />
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<ClCompile Include="..\..\src\video\SDL_surface.c" />
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@@ -406,7 +406,6 @@
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<ClInclude Include="..\..\src\render\software\SDL_drawline.h" />
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<ClInclude Include="..\..\src\render\software\SDL_drawpoint.h" />
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<ClInclude Include="..\..\src\render\software\SDL_render_sw_c.h" />
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<ClInclude Include="..\..\src\render\software\SDL_rotate.h" />
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<ClInclude Include="..\..\src\render\software\SDL_triangle.h" />
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<ClInclude Include="..\..\src\SDL_assert_c.h" />
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<ClInclude Include="..\..\src\SDL_error_c.h" />
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@@ -460,6 +459,7 @@
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<ClInclude Include="..\..\src\video\SDL_pixels_c.h" />
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<ClInclude Include="..\..\src\video\SDL_rect_c.h" />
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<ClInclude Include="..\..\src\video\SDL_RLEaccel_c.h" />
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<ClInclude Include="..\..\src\video\SDL_rotate.h" />
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<ClInclude Include="..\..\src\video\SDL_stb_c.h" />
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<ClInclude Include="..\..\src\video\SDL_surface_c.h" />
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<ClInclude Include="..\..\src\video\SDL_sysvideo.h" />
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@@ -417,7 +417,6 @@
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<ClInclude Include="..\..\src\render\software\SDL_drawline.h" />
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<ClInclude Include="..\..\src\render\software\SDL_drawpoint.h" />
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<ClInclude Include="..\..\src\render\software\SDL_render_sw_c.h" />
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<ClInclude Include="..\..\src\render\software\SDL_rotate.h" />
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<ClInclude Include="..\..\src\render\software\SDL_triangle.h" />
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<ClInclude Include="..\..\src\render\vulkan\SDL_shaders_vulkan.h" />
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<ClInclude Include="..\..\src\SDL_assert_c.h" />
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@@ -513,6 +512,7 @@
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<ClInclude Include="..\..\src\video\SDL_pixels_c.h" />
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<ClInclude Include="..\..\src\video\SDL_rect_c.h" />
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<ClInclude Include="..\..\src\video\SDL_RLEaccel_c.h" />
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<ClInclude Include="..\..\src\video\SDL_rotate.h" />
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<ClInclude Include="..\..\src\video\SDL_stb_c.h" />
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<ClInclude Include="..\..\src\video\SDL_surface_c.h" />
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<ClInclude Include="..\..\src\video\SDL_sysvideo.h" />
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@@ -676,7 +676,6 @@
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<ClCompile Include="..\..\src\render\software\SDL_drawline.c" />
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<ClCompile Include="..\..\src\render\software\SDL_drawpoint.c" />
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<ClCompile Include="..\..\src\render\software\SDL_render_sw.c" />
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<ClCompile Include="..\..\src\render\software\SDL_rotate.c" />
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<ClCompile Include="..\..\src\render\software\SDL_triangle.c" />
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<ClCompile Include="..\..\src\SDL.c" />
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<ClCompile Include="..\..\src\SDL_assert.c" />
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@@ -747,6 +746,7 @@
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<ClCompile Include="..\..\src\video\SDL_pixels.c" />
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<ClCompile Include="..\..\src\video\SDL_rect.c" />
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<ClCompile Include="..\..\src\video\SDL_RLEaccel.c" />
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<ClCompile Include="..\..\src\video\SDL_rotate.c" />
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<ClCompile Include="..\..\src\video\SDL_stb.c" />
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<ClCompile Include="..\..\src\video\SDL_stretch.c" />
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<ClCompile Include="..\..\src\video\SDL_surface.c" />
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@@ -693,6 +693,9 @@
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<ClInclude Include="..\..\src\video\SDL_RLEaccel_c.h">
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<Filter>video</Filter>
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</ClInclude>
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<ClInclude Include="..\..\src\video\SDL_rotate.h">
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<Filter>video</Filter>
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</ClInclude>
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<ClInclude Include="..\..\src\video\SDL_surface_c.h">
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<Filter>video</Filter>
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</ClInclude>
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@@ -885,9 +888,6 @@
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<ClInclude Include="..\..\src\render\software\SDL_render_sw_c.h">
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<Filter>render\software</Filter>
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</ClInclude>
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<ClInclude Include="..\..\src\render\software\SDL_rotate.h">
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<Filter>render\software</Filter>
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</ClInclude>
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<ClInclude Include="..\..\src\render\software\SDL_triangle.h">
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<Filter>render\software</Filter>
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</ClInclude>
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@@ -1380,6 +1380,9 @@
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<ClCompile Include="..\..\src\video\SDL_rect.c">
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<Filter>video</Filter>
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</ClCompile>
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<ClCompile Include="..\..\src\video\SDL_rotate.c">
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<Filter>video</Filter>
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</ClCompile>
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<ClCompile Include="..\..\src\video\SDL_stb.c">
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<Filter>video</Filter>
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</ClCompile>
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@@ -1589,9 +1592,6 @@
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<ClCompile Include="..\..\src\render\software\SDL_render_sw.c">
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<Filter>render\software</Filter>
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</ClCompile>
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<ClCompile Include="..\..\src\render\software\SDL_rotate.c">
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<Filter>render\software</Filter>
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</ClCompile>
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<ClCompile Include="..\..\src\render\software\SDL_triangle.c">
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<Filter>render\software</Filter>
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</ClCompile>
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@@ -288,7 +288,6 @@
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A7D8B9E923E2514400DCD162 /* SDL_blendline.h in Headers */ = {isa = PBXBuildFile; fileRef = A7D8A8F223E2514000DCD162 /* SDL_blendline.h */; };
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A7D8B9EF23E2514400DCD162 /* SDL_drawpoint.h in Headers */ = {isa = PBXBuildFile; fileRef = A7D8A8F323E2514000DCD162 /* SDL_drawpoint.h */; };
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A7D8B9F523E2514400DCD162 /* SDL_rotate.c in Sources */ = {isa = PBXBuildFile; fileRef = A7D8A8F423E2514000DCD162 /* SDL_rotate.c */; };
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A7D8BA0723E2514400DCD162 /* SDL_drawline.h in Headers */ = {isa = PBXBuildFile; fileRef = A7D8A8F723E2514000DCD162 /* SDL_drawline.h */; };
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@@ -298,7 +297,6 @@
|
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A7D8BA1F23E2514400DCD162 /* SDL_blendline.c in Sources */ = {isa = PBXBuildFile; fileRef = A7D8A8FB23E2514000DCD162 /* SDL_blendline.c */; };
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||||
A7D8BA2523E2514400DCD162 /* SDL_drawpoint.c in Sources */ = {isa = PBXBuildFile; fileRef = A7D8A8FC23E2514000DCD162 /* SDL_drawpoint.c */; };
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A7D8BA2B23E2514400DCD162 /* SDL_blendfillrect.c in Sources */ = {isa = PBXBuildFile; fileRef = A7D8A8FD23E2514000DCD162 /* SDL_blendfillrect.c */; };
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A7D8BA3123E2514400DCD162 /* SDL_rotate.h in Headers */ = {isa = PBXBuildFile; fileRef = A7D8A8FE23E2514000DCD162 /* SDL_rotate.h */; };
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@@ -523,6 +521,8 @@
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@@ -877,7 +877,6 @@
|
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@@ -887,7 +886,6 @@
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@@ -1105,6 +1103,8 @@
|
||||
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|
||||
F3D8BDFA2D6D2C7000B22FA1 /* SDL_eventwatch.c */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.c; path = SDL_eventwatch.c; sourceTree = "<group>"; };
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||||
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|
||||
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|
||||
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|
||||
@@ -1661,6 +1661,8 @@
|
||||
F3DDCC542AFD42B600B0842B /* SDL_rect_impl.h */,
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||||
A7D8A61523E2513D00DCD162 /* SDL_RLEaccel.c */,
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||||
A7D8A76723E2513E00DCD162 /* SDL_RLEaccel_c.h */,
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||||
F3DB66322EA9ACC300568044 /* SDL_rotate.h */,
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||||
A7D8A60323E2513D00DCD162 /* SDL_stretch.c */,
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@@ -2220,8 +2222,6 @@
|
||||
A7D8A8F323E2514000DCD162 /* SDL_drawpoint.h */,
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A7D8A8F523E2514000DCD162 /* SDL_render_sw_c.h */,
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A7D8A8F923E2514000DCD162 /* SDL_render_sw.c */,
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A7D8A8F423E2514000DCD162 /* SDL_rotate.c */,
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);
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||||
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F3D46ACA2D20625800D9CBDF /* SDL_storage.h in Headers */,
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F3D46ACB2D20625800D9CBDF /* SDL_sensor.h in Headers */,
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F3DB66352EA9ACC300568044 /* SDL_rotate.h in Headers */,
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F3D46ACC2D20625800D9CBDF /* SDL_properties.h in Headers */,
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F3D46ACD2D20625800D9CBDF /* SDL_bits.h in Headers */,
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F3D46ACE2D20625800D9CBDF /* SDL_keyboard.h in Headers */,
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@@ -2669,7 +2670,6 @@
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F3DDCC5D2AFD42B600B0842B /* SDL_rect_impl.h in Headers */,
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A7D8B9FB23E2514400DCD162 /* SDL_render_sw_c.h in Headers */,
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E4F257972C81903800FCEAFC /* SDL_sysgpu.h in Headers */,
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A7D8BA3123E2514400DCD162 /* SDL_rotate.h in Headers */,
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A7D8A98D23E2514000DCD162 /* SDL_sensor_c.h in Headers */,
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A7D8BA7323E2514400DCD162 /* SDL_shaders_gl.h in Headers */,
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||||
A7D8BA4F23E2514400DCD162 /* SDL_shaders_gles2.h in Headers */,
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||||
@@ -2912,7 +2912,6 @@
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||||
A7D8AEC423E2514100DCD162 /* SDL_cocoaevents.m in Sources */,
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A7D8B86623E2514400DCD162 /* SDL_audiocvt.c in Sources */,
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@@ -2940,6 +2939,7 @@
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||||
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||||
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|
||||
A7D8B4EE23E2514300DCD162 /* SDL_gamepad.c in Sources */,
|
||||
E4A568B62AF763940062EEC4 /* SDL_sysmain_callbacks.c in Sources */,
|
||||
F316ABD82B5C3185002EF551 /* SDL_memset.c in Sources */,
|
||||
|
||||
@@ -939,6 +939,24 @@ extern SDL_DECLSPEC bool SDLCALL SDL_GetSurfaceClipRect(SDL_Surface *surface, SD
|
||||
*/
|
||||
extern SDL_DECLSPEC bool SDLCALL SDL_FlipSurface(SDL_Surface *surface, SDL_FlipMode flip);
|
||||
|
||||
/**
|
||||
* Return a copy of a surface rotated clockwise a number of degrees.
|
||||
*
|
||||
* The angle of rotation can be negative for counter-clockwise rotation.
|
||||
*
|
||||
* When the rotation isn't a multiple of 90 degrees, the resulting surface is larger than the original, with the background filled in with the colorkey, if available, or RGBA 255/255/255/0 if not.
|
||||
*
|
||||
* \param surface the surface to rotate.
|
||||
* \param angle the rotation angle, in degrees.
|
||||
* \returns a rotated copy of the surface or NULL on failure; call SDL_GetError() for
|
||||
* more information.
|
||||
*
|
||||
* \threadsafety This function is not thread safe.
|
||||
*
|
||||
* \since This function is available since SDL 3.2.0.
|
||||
*/
|
||||
extern SDL_DECLSPEC SDL_Surface * SDLCALL SDL_RotateSurface(SDL_Surface *surface, float angle);
|
||||
|
||||
/**
|
||||
* Creates a new surface identical to the existing surface.
|
||||
*
|
||||
|
||||
@@ -1267,6 +1267,7 @@ SDL3_0.0.0 {
|
||||
SDL_GetSystemPageSize;
|
||||
SDL_GetPenDeviceType;
|
||||
SDL_CreateAnimatedCursor;
|
||||
SDL_RotateSurface;
|
||||
# extra symbols go here (don't modify this line)
|
||||
local: *;
|
||||
};
|
||||
|
||||
@@ -1293,3 +1293,4 @@
|
||||
#define SDL_GetSystemPageSize SDL_GetSystemPageSize_REAL
|
||||
#define SDL_GetPenDeviceType SDL_GetPenDeviceType_REAL
|
||||
#define SDL_CreateAnimatedCursor SDL_CreateAnimatedCursor_REAL
|
||||
#define SDL_RotateSurface SDL_RotateSurface_REAL
|
||||
|
||||
@@ -1301,3 +1301,4 @@ SDL_DYNAPI_PROC(bool,SDL_SavePNG,(SDL_Surface *a,const char *b),(a,b),return)
|
||||
SDL_DYNAPI_PROC(int,SDL_GetSystemPageSize,(void),(),return)
|
||||
SDL_DYNAPI_PROC(SDL_PenDeviceType,SDL_GetPenDeviceType,(SDL_PenID a),(a),return)
|
||||
SDL_DYNAPI_PROC(SDL_Cursor*,SDL_CreateAnimatedCursor,(SDL_CursorFrameInfo *a,int b,int c,int d),(a,b,c,d),return)
|
||||
SDL_DYNAPI_PROC(SDL_Surface*,SDL_RotateSurface,(SDL_Surface *a,float b),(a,b),return)
|
||||
|
||||
@@ -31,9 +31,9 @@
|
||||
#include "SDL_blendpoint.h"
|
||||
#include "SDL_drawline.h"
|
||||
#include "SDL_drawpoint.h"
|
||||
#include "SDL_rotate.h"
|
||||
#include "SDL_triangle.h"
|
||||
#include "../../video/SDL_pixels_c.h"
|
||||
#include "../../video/SDL_rotate.h"
|
||||
|
||||
// SDL surface based renderer implementation
|
||||
|
||||
@@ -406,7 +406,7 @@ static bool SW_RenderCopyEx(SDL_Renderer *renderer, SDL_Surface *surface, SDL_Te
|
||||
SDL_GetSurfaceColorMod(src, &rMod, &gMod, &bMod);
|
||||
|
||||
// SDLgfx_rotateSurface only accepts 32-bit surfaces with a 8888 layout. Everything else has to be converted.
|
||||
if (src->fmt->bits_per_pixel != 32 || SDL_PIXELLAYOUT(src->format) != SDL_PACKEDLAYOUT_8888 || !SDL_ISPIXELFORMAT_ALPHA(src->format)) {
|
||||
if (!(SDL_BITSPERPIXEL(src->format) == 32 && SDL_PIXELLAYOUT(src->format) == SDL_PACKEDLAYOUT_8888)) {
|
||||
blitRequired = true;
|
||||
}
|
||||
|
||||
|
||||
@@ -30,16 +30,9 @@ Andreas Schiffler -- aschiffler at ferzkopp dot net
|
||||
*/
|
||||
#include "SDL_internal.h"
|
||||
|
||||
#ifdef SDL_VIDEO_RENDER_SW
|
||||
|
||||
#if defined(SDL_PLATFORM_WINDOWS)
|
||||
#include "../../core/windows/SDL_windows.h"
|
||||
#endif
|
||||
|
||||
#include "SDL_surface_c.h"
|
||||
#include "SDL_rotate.h"
|
||||
|
||||
#include "../../video/SDL_surface_c.h"
|
||||
|
||||
// ---- Internally used structures
|
||||
|
||||
/**
|
||||
@@ -506,8 +499,9 @@ SDL_Surface *SDLgfx_rotateSurface(SDL_Surface *src, double angle, int smooth, in
|
||||
}
|
||||
}
|
||||
// This function requires a 32-bit surface or 8-bit surface with a colorkey
|
||||
is8bit = src->fmt->bits_per_pixel == 8 && colorKeyAvailable;
|
||||
if (!(is8bit || (src->fmt->bits_per_pixel == 32 && SDL_ISPIXELFORMAT_ALPHA(src->format)))) {
|
||||
is8bit = (src->format == SDL_PIXELFORMAT_INDEX8) && colorKeyAvailable;
|
||||
if (!is8bit &&
|
||||
!(SDL_BITSPERPIXEL(src->format) == 32 && SDL_PIXELLAYOUT(src->format) == SDL_PACKEDLAYOUT_8888)) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
@@ -609,4 +603,3 @@ SDL_Surface *SDLgfx_rotateSurface(SDL_Surface *src, double angle, int smooth, in
|
||||
return rz_dst;
|
||||
}
|
||||
|
||||
#endif // SDL_VIDEO_RENDER_SW
|
||||
@@ -24,6 +24,7 @@
|
||||
#include "SDL_video_c.h"
|
||||
#include "SDL_RLEaccel_c.h"
|
||||
#include "SDL_pixels_c.h"
|
||||
#include "SDL_rotate.h"
|
||||
#include "SDL_stb_c.h"
|
||||
#include "SDL_yuv_c.h"
|
||||
#include "../render/SDL_sysrender.h"
|
||||
@@ -2167,6 +2168,38 @@ error:
|
||||
return NULL;
|
||||
}
|
||||
|
||||
SDL_Surface *SDL_RotateSurface(SDL_Surface *surface, float angle)
|
||||
{
|
||||
SDL_Surface *rotated = NULL;
|
||||
|
||||
CHECK_PARAM(!SDL_SurfaceValid(surface)) {
|
||||
SDL_InvalidParamError("surface");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
SDL_Rect rect_dest;
|
||||
double cangle, sangle;
|
||||
SDL_FPoint center = { surface->w * 0.5f, surface->h * 0.5f };
|
||||
SDLgfx_rotozoomSurfaceSizeTrig(surface->w, surface->h, angle, ¢er, &rect_dest, &cangle, &sangle);
|
||||
|
||||
// This function requires a 32-bit surface or 8-bit surface with a colorkey
|
||||
if ((SDL_BITSPERPIXEL(surface->format) == 32 && SDL_PIXELLAYOUT(surface->format) == SDL_PACKEDLAYOUT_8888) ||
|
||||
(surface->format == SDL_PIXELFORMAT_INDEX8 && SDL_SurfaceHasColorKey(surface))) {
|
||||
rotated = SDLgfx_rotateSurface(surface, angle, 1, 0, 0, &rect_dest, cangle, sangle, ¢er);
|
||||
} else {
|
||||
SDL_Surface *convert = SDL_ConvertSurface(surface, SDL_PIXELFORMAT_RGBA32);
|
||||
if (convert) {
|
||||
SDL_Surface *tmp = SDLgfx_rotateSurface(convert, angle, 1, 0, 0, &rect_dest, cangle, sangle, ¢er);
|
||||
if (tmp) {
|
||||
rotated = SDL_ConvertSurfaceAndColorspace(tmp, surface->format, surface->palette, surface->colorspace, surface->props);
|
||||
SDL_DestroySurface(tmp);
|
||||
}
|
||||
SDL_DestroySurface(convert);
|
||||
}
|
||||
}
|
||||
return rotated;
|
||||
}
|
||||
|
||||
SDL_Surface *SDL_DuplicateSurface(SDL_Surface *surface)
|
||||
{
|
||||
CHECK_PARAM(!SDL_SurfaceValid(surface)) {
|
||||
|
||||
@@ -393,6 +393,7 @@ if(WIN32 AND CMAKE_SIZEOF_VOID_P EQUAL 4)
|
||||
add_sdl_test_executable(pretest SOURCES pretest.c NONINTERACTIVE NONINTERACTIVE_TIMEOUT 60)
|
||||
endif()
|
||||
add_sdl_test_executable(testrendertarget NEEDS_RESOURCES TESTUTILS SOURCES testrendertarget.c)
|
||||
add_sdl_test_executable(testrotate SOURCES testrotate.c)
|
||||
add_sdl_test_executable(testscale NEEDS_RESOURCES TESTUTILS SOURCES testscale.c)
|
||||
add_sdl_test_executable(testsem NONINTERACTIVE DISABLE_THREADS_ARGS "--no-threads" NONINTERACTIVE_ARGS 10 NONINTERACTIVE_TIMEOUT 30 SOURCES testsem.c)
|
||||
add_sdl_test_executable(testsensor SOURCES testsensor.c)
|
||||
|
||||
205
test/testrotate.c
Normal file
205
test/testrotate.c
Normal file
@@ -0,0 +1,205 @@
|
||||
/*
|
||||
Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
|
||||
|
||||
This software is provided 'as-is', without any express or implied
|
||||
warranty. In no event will the authors be held liable for any damages
|
||||
arising from the use of this software.
|
||||
|
||||
Permission is granted to anyone to use this software for any purpose,
|
||||
including commercial applications, and to alter it and redistribute it
|
||||
freely.
|
||||
*/
|
||||
|
||||
#define SDL_MAIN_USE_CALLBACKS 1
|
||||
#include <SDL3/SDL_test.h>
|
||||
#include <SDL3/SDL_test_common.h>
|
||||
#include <SDL3/SDL_main.h>
|
||||
|
||||
#define IMAGE_SIZE 256
|
||||
|
||||
static SDLTest_CommonState *state;
|
||||
static SDL_Surface *image;
|
||||
static SDL_Texture *texture;
|
||||
static int format_index = -1;
|
||||
static SDL_PixelFormat formats[] = {
|
||||
SDL_PIXELFORMAT_RGBA32,
|
||||
SDL_PIXELFORMAT_ARGB32,
|
||||
SDL_PIXELFORMAT_RGBX32,
|
||||
SDL_PIXELFORMAT_XRGB32,
|
||||
SDL_PIXELFORMAT_ARGB1555,
|
||||
SDL_PIXELFORMAT_INDEX8
|
||||
};
|
||||
static int angle;
|
||||
static int direction = 1;
|
||||
|
||||
static bool UpdateImageFormat(void)
|
||||
{
|
||||
static const SDL_Color colors[] = {
|
||||
{ 255, 255, 255, SDL_ALPHA_TRANSPARENT }, /* Colorkey - white with transparent alpha */
|
||||
{ 255, 0, 0, SDL_ALPHA_OPAQUE }, /* Red */
|
||||
{ 255, 255, 0, SDL_ALPHA_OPAQUE }, /* Yellow */
|
||||
{ 0, 255, 0, SDL_ALPHA_OPAQUE }, /* Green */
|
||||
{ 0, 0, 255, SDL_ALPHA_OPAQUE }, /* Blue */
|
||||
};
|
||||
SDL_Rect rect;
|
||||
Uint32 color;
|
||||
|
||||
++format_index;
|
||||
if (format_index == SDL_arraysize(formats)) {
|
||||
format_index = 0;
|
||||
}
|
||||
|
||||
SDL_DestroySurface(image);
|
||||
|
||||
image = SDL_CreateSurface(IMAGE_SIZE, IMAGE_SIZE, formats[format_index]);
|
||||
if (!image) {
|
||||
SDL_Log("Couldn't create surface: %s\n", SDL_GetError());
|
||||
return false;
|
||||
}
|
||||
|
||||
if (image->format == SDL_PIXELFORMAT_INDEX8) {
|
||||
/* Set the palette and colorkey */
|
||||
SDL_Palette *palette = SDL_CreateSurfacePalette(image);
|
||||
|
||||
SDL_SetPaletteColors(palette, colors, 0, SDL_arraysize(colors));
|
||||
SDL_SetSurfaceColorKey(image, true, 0);
|
||||
}
|
||||
|
||||
/* Upper left */
|
||||
rect.x = 0;
|
||||
rect.y = 0;
|
||||
rect.w = IMAGE_SIZE / 2;
|
||||
rect.h = IMAGE_SIZE / 2;
|
||||
color = SDL_MapSurfaceRGB(image, colors[1].r, colors[1].g, colors[1].b);
|
||||
SDL_FillSurfaceRect(image, &rect, color);
|
||||
|
||||
/* Upper right */
|
||||
rect.x += rect.w;
|
||||
color = SDL_MapSurfaceRGB(image, colors[2].r, colors[2].g, colors[2].b);
|
||||
SDL_FillSurfaceRect(image, &rect, color);
|
||||
|
||||
/* Lower left */
|
||||
rect.x = 0;
|
||||
rect.y += rect.h;
|
||||
color = SDL_MapSurfaceRGB(image, colors[3].r, colors[3].g, colors[3].b);
|
||||
SDL_FillSurfaceRect(image, &rect, color);
|
||||
|
||||
/* Lower right */
|
||||
rect.x += rect.w;
|
||||
color = SDL_MapSurfaceRGB(image, colors[4].r, colors[4].g, colors[4].b);
|
||||
SDL_FillSurfaceRect(image, &rect, color);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool UpdateRotation(SDL_Renderer *renderer)
|
||||
{
|
||||
SDL_Surface *rotated;
|
||||
|
||||
angle += direction;
|
||||
|
||||
rotated = SDL_RotateSurface(image, (float)angle);
|
||||
if (!rotated) {
|
||||
SDL_Log("Couldn't rotate surface: %s", SDL_GetError());
|
||||
return false;
|
||||
}
|
||||
|
||||
SDL_DestroyTexture(texture);
|
||||
texture = SDL_CreateTextureFromSurface(renderer, rotated);
|
||||
SDL_DestroySurface(rotated);
|
||||
if (!texture) {
|
||||
SDL_Log("Couldn't create texture: %s", SDL_GetError());
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static void Draw(SDL_Renderer *renderer)
|
||||
{
|
||||
int w, h;
|
||||
SDL_FRect dst;
|
||||
|
||||
/* Clear the screen */
|
||||
SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
|
||||
SDL_RenderClear(renderer);
|
||||
|
||||
UpdateRotation(renderer);
|
||||
|
||||
/* Draw the rotated image */
|
||||
SDL_GetCurrentRenderOutputSize(renderer, &w, &h);
|
||||
dst.x = (w - texture->w) / 2.0f;
|
||||
dst.y = (h - texture->h) / 2.0f;
|
||||
dst.w = (float)texture->w;
|
||||
dst.h = (float)texture->h;
|
||||
SDL_RenderTexture(renderer, texture, NULL, &dst);
|
||||
|
||||
/* Show the current format */
|
||||
SDL_SetRenderDrawColor(renderer, 255, 255, 255, SDL_ALPHA_OPAQUE);
|
||||
SDL_RenderDebugTextFormat(renderer, 4.0f, 4.0f, "Format: %s, press SPACE to cycle", SDL_GetPixelFormatName(formats[format_index]));
|
||||
|
||||
/* All done! */
|
||||
SDL_RenderPresent(renderer);
|
||||
}
|
||||
|
||||
void SDL_AppQuit(void *appstate, SDL_AppResult result)
|
||||
{
|
||||
SDLTest_CommonQuit(state);
|
||||
}
|
||||
|
||||
SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
|
||||
{
|
||||
/* Initialize test framework */
|
||||
state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
|
||||
if (!state) {
|
||||
return SDL_APP_FAILURE;
|
||||
}
|
||||
|
||||
if (!SDLTest_CommonInit(state)) {
|
||||
return SDL_APP_FAILURE;
|
||||
}
|
||||
|
||||
/* Create the spinning image */
|
||||
UpdateImageFormat();
|
||||
|
||||
return SDL_APP_CONTINUE;
|
||||
}
|
||||
|
||||
|
||||
SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
|
||||
{
|
||||
switch (event->type) {
|
||||
case SDL_EVENT_KEY_UP:
|
||||
switch (event->key.key) {
|
||||
case SDLK_SPACE:
|
||||
UpdateImageFormat();
|
||||
break;
|
||||
case SDLK_LEFT:
|
||||
direction = -1;
|
||||
break;
|
||||
case SDLK_RIGHT:
|
||||
direction = 1;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return SDLTest_CommonEventMainCallbacks(state, event);
|
||||
}
|
||||
|
||||
SDL_AppResult SDL_AppIterate(void *appstate)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < state->num_windows; ++i) {
|
||||
Draw(state->renderers[i]);
|
||||
}
|
||||
|
||||
/* Wait a bit so we don't spin too quickly to see */
|
||||
SDL_Delay(10);
|
||||
|
||||
return SDL_APP_CONTINUE;
|
||||
}
|
||||
Reference in New Issue
Block a user