mirror of
https://github.com/libsdl-org/SDL.git
synced 2026-01-05 21:07:53 +00:00
fix: Blending rendering anomaly when using the software renderer with SDL_WINDOW_TRANSPARENT on Windows. (#13866)
This commit is contained in:
Qiang
@@ -131,6 +131,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "01-joystick-polling", "exam
|
||||
EndProject
|
||||
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "02-joystick-events", "examples\input\02-joystick-events\02-joystick-events.vcxproj", "{FCBDF2B2-1129-49AE-9406-3F219E65CA89}"
|
||||
EndProject
|
||||
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testsoftwaretransparent", "tests\testsoftwaretransparent\testsoftwaretransparent.vcxproj", "{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}"
|
||||
EndProject
|
||||
Global
|
||||
GlobalSection(SolutionConfigurationPlatforms) = preSolution
|
||||
Debug|Win32 = Debug|Win32
|
||||
@@ -579,6 +581,14 @@ Global
|
||||
{FCBDF2B2-1129-49AE-9406-3F219E65CA89}.Release|Win32.Build.0 = Release|Win32
|
||||
{FCBDF2B2-1129-49AE-9406-3F219E65CA89}.Release|x64.ActiveCfg = Release|x64
|
||||
{FCBDF2B2-1129-49AE-9406-3F219E65CA89}.Release|x64.Build.0 = Release|x64
|
||||
{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}.Debug|Win32.ActiveCfg = Debug|Win32
|
||||
{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}.Debug|Win32.Build.0 = Debug|Win32
|
||||
{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}.Debug|x64.ActiveCfg = Debug|x64
|
||||
{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}.Debug|x64.Build.0 = Debug|x64
|
||||
{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}.Release|Win32.ActiveCfg = Release|Win32
|
||||
{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}.Release|Win32.Build.0 = Release|Win32
|
||||
{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}.Release|x64.ActiveCfg = Release|x64
|
||||
{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}.Release|x64.Build.0 = Release|x64
|
||||
EndGlobalSection
|
||||
GlobalSection(SolutionProperties) = preSolution
|
||||
HideSolutionNode = FALSE
|
||||
@@ -644,6 +654,7 @@ Global
|
||||
{3DB9B219-769E-43AC-8B8B-319DB6045DCF} = {D1BF59F6-22DC-493B-BDEB-451A50DA793D}
|
||||
{B3852DB7-E925-4026-8B9D-D2272EFEFF3C} = {8DEAE483-FDE7-463F-9FD5-F597BBAED1F9}
|
||||
{FCBDF2B2-1129-49AE-9406-3F219E65CA89} = {8DEAE483-FDE7-463F-9FD5-F597BBAED1F9}
|
||||
{D91C45E2-274E-4C0F-89C7-9986F9A7E85A} = {D69D5741-611F-4E14-8541-1FEE94F50B5A}
|
||||
EndGlobalSection
|
||||
GlobalSection(ExtensibilityGlobals) = postSolution
|
||||
SolutionGuid = {C320C9F2-1A8F-41D7-B02B-6338F872BCAD}
|
||||
|
||||
@@ -0,0 +1,209 @@
|
||||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
|
||||
<ItemGroup Label="ProjectConfigurations">
|
||||
<ProjectConfiguration Include="Debug|Win32">
|
||||
<Configuration>Debug</Configuration>
|
||||
<Platform>Win32</Platform>
|
||||
</ProjectConfiguration>
|
||||
<ProjectConfiguration Include="Debug|x64">
|
||||
<Configuration>Debug</Configuration>
|
||||
<Platform>x64</Platform>
|
||||
</ProjectConfiguration>
|
||||
<ProjectConfiguration Include="Release|Win32">
|
||||
<Configuration>Release</Configuration>
|
||||
<Platform>Win32</Platform>
|
||||
</ProjectConfiguration>
|
||||
<ProjectConfiguration Include="Release|x64">
|
||||
<Configuration>Release</Configuration>
|
||||
<Platform>x64</Platform>
|
||||
</ProjectConfiguration>
|
||||
</ItemGroup>
|
||||
<PropertyGroup Label="Globals">
|
||||
<ProjectGuid>{D91C45E2-274E-4C0F-89C7-9986F9A7E85A}</ProjectGuid>
|
||||
<RootNamespace>testsoftwaretransparent</RootNamespace>
|
||||
<VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">10.0</VisualStudioVersion>
|
||||
</PropertyGroup>
|
||||
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
|
||||
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
|
||||
<ConfigurationType>Application</ConfigurationType>
|
||||
<PlatformToolset Condition="'$(VisualStudioVersion)' != '10.0'">$(DefaultPlatformToolset)</PlatformToolset>
|
||||
</PropertyGroup>
|
||||
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
|
||||
<ConfigurationType>Application</ConfigurationType>
|
||||
<PlatformToolset Condition="'$(VisualStudioVersion)' != '10.0'">$(DefaultPlatformToolset)</PlatformToolset>
|
||||
</PropertyGroup>
|
||||
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
|
||||
<ConfigurationType>Application</ConfigurationType>
|
||||
<PlatformToolset Condition="'$(VisualStudioVersion)' != '10.0'">$(DefaultPlatformToolset)</PlatformToolset>
|
||||
</PropertyGroup>
|
||||
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
|
||||
<ConfigurationType>Application</ConfigurationType>
|
||||
<PlatformToolset Condition="'$(VisualStudioVersion)' != '10.0'">$(DefaultPlatformToolset)</PlatformToolset>
|
||||
</PropertyGroup>
|
||||
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
|
||||
<ImportGroup Label="ExtensionSettings">
|
||||
</ImportGroup>
|
||||
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
|
||||
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
|
||||
</ImportGroup>
|
||||
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
|
||||
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
|
||||
</ImportGroup>
|
||||
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
|
||||
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
|
||||
</ImportGroup>
|
||||
<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
|
||||
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
|
||||
</ImportGroup>
|
||||
<PropertyGroup Label="UserMacros" />
|
||||
<PropertyGroup>
|
||||
<_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>
|
||||
<OutDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(SolutionDir)$(Platform)\$(Configuration)\</OutDir>
|
||||
<IntDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(Platform)\$(Configuration)\</IntDir>
|
||||
<OutDir Condition="'$(Configuration)|$(Platform)'=='Release|x64'">$(SolutionDir)$(Platform)\$(Configuration)\</OutDir>
|
||||
<IntDir Condition="'$(Configuration)|$(Platform)'=='Release|x64'">$(Platform)\$(Configuration)\</IntDir>
|
||||
<OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(SolutionDir)$(Platform)\$(Configuration)\</OutDir>
|
||||
<IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(Platform)\$(Configuration)\</IntDir>
|
||||
<OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">$(SolutionDir)$(Platform)\$(Configuration)\</OutDir>
|
||||
<IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">$(Platform)\$(Configuration)\</IntDir>
|
||||
<CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">AllRules.ruleset</CodeAnalysisRuleSet>
|
||||
<CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" />
|
||||
<CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" />
|
||||
<CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">AllRules.ruleset</CodeAnalysisRuleSet>
|
||||
<CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" />
|
||||
<CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" />
|
||||
<CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">AllRules.ruleset</CodeAnalysisRuleSet>
|
||||
<CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
|
||||
<CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
|
||||
<CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Release|x64'">AllRules.ruleset</CodeAnalysisRuleSet>
|
||||
<CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />
|
||||
<CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />
|
||||
</PropertyGroup>
|
||||
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
|
||||
<Midl>
|
||||
<PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<MkTypLibCompatible>true</MkTypLibCompatible>
|
||||
<SuppressStartupBanner>true</SuppressStartupBanner>
|
||||
<TargetEnvironment>Win32</TargetEnvironment>
|
||||
<TypeLibraryName>.\Release/testsoftwaretransparent.tlb</TypeLibraryName>
|
||||
</Midl>
|
||||
<ClCompile>
|
||||
<AdditionalOptions>%(AdditionalOptions) /utf-8</AdditionalOptions>
|
||||
<AdditionalIncludeDirectories>$(SolutionDir)/../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
|
||||
<AdditionalUsingDirectories>%(AdditionalUsingDirectories)</AdditionalUsingDirectories>
|
||||
<PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
|
||||
<WarningLevel>Level3</WarningLevel>
|
||||
</ClCompile>
|
||||
<ResourceCompile>
|
||||
<PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<Culture>0x0409</Culture>
|
||||
</ResourceCompile>
|
||||
<Link>
|
||||
<SubSystem>Windows</SubSystem>
|
||||
</Link>
|
||||
</ItemDefinitionGroup>
|
||||
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
|
||||
<Midl>
|
||||
<PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<MkTypLibCompatible>true</MkTypLibCompatible>
|
||||
<SuppressStartupBanner>true</SuppressStartupBanner>
|
||||
<TargetEnvironment>X64</TargetEnvironment>
|
||||
<TypeLibraryName>.\Release/testsoftwaretransparent.tlb</TypeLibraryName>
|
||||
</Midl>
|
||||
<ClCompile>
|
||||
<AdditionalOptions>%(AdditionalOptions) /utf-8</AdditionalOptions>
|
||||
<AdditionalIncludeDirectories>$(SolutionDir)/../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
|
||||
<AdditionalUsingDirectories>%(AdditionalUsingDirectories)</AdditionalUsingDirectories>
|
||||
<PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
|
||||
<WarningLevel>Level3</WarningLevel>
|
||||
</ClCompile>
|
||||
<ResourceCompile>
|
||||
<PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<Culture>0x0409</Culture>
|
||||
</ResourceCompile>
|
||||
<Link>
|
||||
<SubSystem>Windows</SubSystem>
|
||||
</Link>
|
||||
</ItemDefinitionGroup>
|
||||
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
|
||||
<Midl>
|
||||
<PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<MkTypLibCompatible>true</MkTypLibCompatible>
|
||||
<SuppressStartupBanner>true</SuppressStartupBanner>
|
||||
<TargetEnvironment>Win32</TargetEnvironment>
|
||||
<TypeLibraryName>.\Debug/testsoftwaretransparent.tlb</TypeLibraryName>
|
||||
</Midl>
|
||||
<ClCompile>
|
||||
<AdditionalOptions>%(AdditionalOptions) /utf-8</AdditionalOptions>
|
||||
<Optimization>Disabled</Optimization>
|
||||
<AdditionalIncludeDirectories>$(SolutionDir)/../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
|
||||
<AdditionalUsingDirectories>%(AdditionalUsingDirectories)</AdditionalUsingDirectories>
|
||||
<PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
|
||||
<WarningLevel>Level3</WarningLevel>
|
||||
<DebugInformationFormat>OldStyle</DebugInformationFormat>
|
||||
</ClCompile>
|
||||
<ResourceCompile>
|
||||
<PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<Culture>0x0409</Culture>
|
||||
</ResourceCompile>
|
||||
<Link>
|
||||
<GenerateDebugInformation>true</GenerateDebugInformation>
|
||||
<SubSystem>Windows</SubSystem>
|
||||
</Link>
|
||||
</ItemDefinitionGroup>
|
||||
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
|
||||
<Midl>
|
||||
<PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<MkTypLibCompatible>true</MkTypLibCompatible>
|
||||
<SuppressStartupBanner>true</SuppressStartupBanner>
|
||||
<TargetEnvironment>X64</TargetEnvironment>
|
||||
<TypeLibraryName>.\Debug/testsoftwaretransparent.tlb</TypeLibraryName>
|
||||
</Midl>
|
||||
<ClCompile>
|
||||
<AdditionalOptions>%(AdditionalOptions) /utf-8</AdditionalOptions>
|
||||
<Optimization>Disabled</Optimization>
|
||||
<AdditionalIncludeDirectories>$(SolutionDir)/../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
|
||||
<AdditionalUsingDirectories>%(AdditionalUsingDirectories)</AdditionalUsingDirectories>
|
||||
<PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
|
||||
<WarningLevel>Level3</WarningLevel>
|
||||
<DebugInformationFormat>OldStyle</DebugInformationFormat>
|
||||
</ClCompile>
|
||||
<ResourceCompile>
|
||||
<PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||
<Culture>0x0409</Culture>
|
||||
</ResourceCompile>
|
||||
<Link>
|
||||
<GenerateDebugInformation>true</GenerateDebugInformation>
|
||||
<SubSystem>Windows</SubSystem>
|
||||
</Link>
|
||||
</ItemDefinitionGroup>
|
||||
<ItemDefinitionGroup Condition="'$(TreatWarningsAsError)'!=''">
|
||||
<ClCompile>
|
||||
<TreatWarningAsError>$(TreatWarningsAsError)</TreatWarningAsError>
|
||||
</ClCompile>
|
||||
</ItemDefinitionGroup>
|
||||
<ItemGroup>
|
||||
<ProjectReference Include="..\..\SDL\SDL.vcxproj">
|
||||
<Project>{81ce8daf-ebb2-4761-8e45-b71abcca8c68}</Project>
|
||||
<Private>false</Private>
|
||||
<CopyLocalSatelliteAssemblies>false</CopyLocalSatelliteAssemblies>
|
||||
<ReferenceOutputAssembly>true</ReferenceOutputAssembly>
|
||||
</ProjectReference>
|
||||
<ProjectReference Include="..\..\SDL_test\SDL_test.vcxproj">
|
||||
<Project>{da956fd3-e143-46f2-9fe5-c77bebc56b1a}</Project>
|
||||
<Private>false</Private>
|
||||
<CopyLocalSatelliteAssemblies>false</CopyLocalSatelliteAssemblies>
|
||||
<ReferenceOutputAssembly>true</ReferenceOutputAssembly>
|
||||
</ProjectReference>
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<ClCompile Include="..\..\..\test\testsoftwaretransparent.c" />
|
||||
</ItemGroup>
|
||||
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
|
||||
<ImportGroup Label="ExtensionTargets">
|
||||
</ImportGroup>
|
||||
</Project>
|
||||
@@ -59,6 +59,9 @@ bool WIN_CreateWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *window, SDL
|
||||
GetDIBits(data->hdc, hbm, 0, 0, NULL, info, DIB_RGB_COLORS);
|
||||
DeleteObject(hbm);
|
||||
|
||||
// Check if a transparent channel is required
|
||||
bool need_alpha = (window->flags & SDL_WINDOW_TRANSPARENT) != 0;
|
||||
|
||||
*format = SDL_PIXELFORMAT_UNKNOWN;
|
||||
if (info->bmiHeader.biCompression == BI_BITFIELDS) {
|
||||
int bpp;
|
||||
@@ -68,16 +71,22 @@ bool WIN_CreateWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *window, SDL
|
||||
masks = (Uint32 *)((Uint8 *)info + info->bmiHeader.biSize);
|
||||
*format = SDL_GetPixelFormatForMasks(bpp, masks[0], masks[1], masks[2], 0);
|
||||
}
|
||||
if (*format == SDL_PIXELFORMAT_UNKNOWN) {
|
||||
// We'll use RGB format for now
|
||||
*format = SDL_PIXELFORMAT_XRGB8888;
|
||||
if (*format == SDL_PIXELFORMAT_UNKNOWN || need_alpha) {
|
||||
// We'll use RGB or BGRA32 format for now
|
||||
*format = need_alpha ? SDL_PIXELFORMAT_BGRA32 : SDL_PIXELFORMAT_XRGB8888;
|
||||
|
||||
// Create a new one
|
||||
SDL_memset(info, 0, size);
|
||||
info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
|
||||
info->bmiHeader.biPlanes = 1;
|
||||
info->bmiHeader.biBitCount = 32;
|
||||
info->bmiHeader.biCompression = BI_RGB;
|
||||
info->bmiHeader.biCompression = need_alpha ? BI_BITFIELDS : BI_RGB;
|
||||
|
||||
if (need_alpha) {
|
||||
int tmpbpp;
|
||||
Uint32 *bgr32masks = (Uint32 *)((Uint8 *)info + info->bmiHeader.biSize);
|
||||
SDL_GetMasksForPixelFormat(SDL_PIXELFORMAT_BGRA32, &tmpbpp, &bgr32masks[0], &bgr32masks[1], &bgr32masks[2], &bgr32masks[3]);
|
||||
}
|
||||
}
|
||||
|
||||
// Fill in the size information
|
||||
|
||||
155
test/testsoftwaretransparent.c
Normal file
155
test/testsoftwaretransparent.c
Normal file
@@ -0,0 +1,155 @@
|
||||
/*
|
||||
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.
|
||||
*/
|
||||
#include <SDL3/SDL.h>
|
||||
#include <SDL3/SDL_main.h>
|
||||
|
||||
#include "glass.h"
|
||||
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
const char *image_file = NULL;
|
||||
SDL_Window *window = NULL;
|
||||
SDL_Renderer *renderer = NULL;
|
||||
SDL_Texture *texture = NULL;
|
||||
SDL_WindowFlags flags;
|
||||
bool done = false;
|
||||
SDL_Event event;
|
||||
|
||||
int return_code = 1;
|
||||
|
||||
|
||||
int windowWidth = 800;
|
||||
int windowHeight = 600;
|
||||
SDL_FRect destRect;
|
||||
destRect.x = 0;
|
||||
destRect.y = 0;
|
||||
destRect.w = 100;
|
||||
destRect.h = 100;
|
||||
|
||||
SDL_FRect destRect2;
|
||||
destRect2.x = 700;
|
||||
destRect2.y = 0;
|
||||
destRect2.w = 100;
|
||||
destRect2.h = 100;
|
||||
|
||||
SDL_FRect destRect3;
|
||||
destRect3.x = 0;
|
||||
destRect3.y = 500;
|
||||
destRect3.w = 100;
|
||||
destRect3.h = 100;
|
||||
|
||||
SDL_FRect destRect4;
|
||||
destRect4.x = 700;
|
||||
destRect4.y = 500;
|
||||
destRect4.w = 100;
|
||||
destRect4.h = 100;
|
||||
|
||||
SDL_FRect destRect5;
|
||||
destRect5.x = 350;
|
||||
destRect5.y = 250;
|
||||
destRect5.w = 100;
|
||||
destRect5.h = 100;
|
||||
|
||||
|
||||
/* Create the window hidden */
|
||||
flags = (SDL_WINDOW_HIDDEN | SDL_WINDOW_TRANSPARENT);
|
||||
//flags |= SDL_WINDOW_BORDERLESS;
|
||||
|
||||
window = SDL_CreateWindow("SDL Software Renderer Transparent Test", windowWidth, windowHeight, flags);
|
||||
if (!window) {
|
||||
SDL_Log("Couldn't create transparent window: %s", SDL_GetError());
|
||||
goto quit;
|
||||
}
|
||||
|
||||
/* Create a software renderer and set the blend mode */
|
||||
renderer = SDL_CreateRenderer(window, SDL_SOFTWARE_RENDERER);
|
||||
if (!renderer) {
|
||||
SDL_Log("Couldn't create renderer: %s", SDL_GetError());
|
||||
goto quit;
|
||||
}
|
||||
|
||||
if (!SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND)) {
|
||||
SDL_Log("Couldn't set renderer blend mode: %s\n", SDL_GetError());
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Create texture and set the blend mode */
|
||||
// texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA32, SDL_TEXTUREACCESS_TARGET, windowWidth, windowHeight);
|
||||
//texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, windowWidth, windowHeight);
|
||||
// texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_BGRA32, SDL_TEXTUREACCESS_TARGET, windowWidth, windowHeight);
|
||||
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_BGRA8888, SDL_TEXTUREACCESS_TARGET, windowWidth, windowHeight);
|
||||
if (texture == NULL) {
|
||||
SDL_Log("Couldn't create texture: %s\n", SDL_GetError());
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND_PREMULTIPLIED)) {
|
||||
SDL_Log("Couldn't set texture blend mode: %s\n", SDL_GetError());
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Show */
|
||||
SDL_ShowWindow(window);
|
||||
|
||||
/* We're ready to go! */
|
||||
while (!done) {
|
||||
while (SDL_PollEvent(&event)) {
|
||||
switch (event.type) {
|
||||
case SDL_EVENT_KEY_DOWN:
|
||||
if (event.key.key == SDLK_ESCAPE) {
|
||||
done = true;
|
||||
}
|
||||
break;
|
||||
case SDL_EVENT_QUIT:
|
||||
done = true;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* Draw opaque red squares at the four corners of the form, and draw a red square with an alpha value of 180 in the center of the form */
|
||||
|
||||
SDL_SetRenderTarget(renderer, texture);
|
||||
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
|
||||
SDL_RenderClear(renderer);
|
||||
|
||||
SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
|
||||
SDL_RenderFillRect(renderer, &destRect);
|
||||
SDL_RenderFillRect(renderer, &destRect2);
|
||||
SDL_RenderFillRect(renderer, &destRect3);
|
||||
SDL_RenderFillRect(renderer, &destRect4);
|
||||
SDL_SetRenderDrawColor(renderer, 255, 0, 0, 180);
|
||||
SDL_RenderFillRect(renderer, &destRect5);
|
||||
|
||||
SDL_SetRenderTarget(renderer, NULL);
|
||||
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
|
||||
SDL_RenderClear(renderer);
|
||||
SDL_RenderTexture(renderer, texture, NULL, NULL);
|
||||
|
||||
/* Show everything on the screen and wait a bit */
|
||||
SDL_RenderPresent(renderer);
|
||||
SDL_Delay(100);
|
||||
}
|
||||
|
||||
/* Success! */
|
||||
return_code = 0;
|
||||
|
||||
quit:
|
||||
SDL_DestroyTexture(texture);
|
||||
SDL_DestroyRenderer(renderer);
|
||||
SDL_DestroyWindow(window);
|
||||
SDL_Quit();
|
||||
return return_code;
|
||||
}
|
||||
Reference in New Issue
Block a user