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Add support for asynchronously screenshot capturing.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| #pragma once | ||
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| typedef void (*fnGLQueryCaptureCallback)(void* pBuf, size_t cbBufSize, int width, int height); | ||
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| void GL_InitCapture(); | ||
| void GL_ShutdownCapture(); | ||
| void GL_BeginCapture(fnGLQueryCaptureCallback callback); | ||
| void GL_QueryAsyncCapture(fnGLQueryCaptureCallback callback); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,192 @@ | ||
| #include <metahook.h> | ||
| #include <glew.h> | ||
| #include "gl_capture.h" | ||
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| GLuint g_CapturePBO = 0; | ||
| GLsync g_CaptureSyncObject = 0; | ||
| int g_CaptureImageWidth = 0; | ||
| int g_CaptureImageHeight = 0; | ||
| void* g_CaptureImageBuffer = NULL; | ||
| void (*g_pfnBeginCapture)(fnGLQueryCaptureCallback callback) = NULL; | ||
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| void GL_InitCaptureImageBuffer(int width, int height) | ||
| { | ||
| g_CaptureImageBuffer = (byte*)malloc(width * height * 3); | ||
| } | ||
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| void GL_ShutdownCaptureImageBuffer() | ||
| { | ||
| if (g_CaptureImageBuffer) | ||
| { | ||
| free(g_CaptureImageBuffer); | ||
| g_CaptureImageBuffer = NULL; | ||
| } | ||
| } | ||
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| void GL_InitCapturePBO(int width, int height) | ||
| { | ||
| glGenBuffers(1, &g_CapturePBO); | ||
| glBindBuffer(GL_PIXEL_PACK_BUFFER, g_CapturePBO); | ||
| glBufferData(GL_PIXEL_PACK_BUFFER, width * height * 3, 0, GL_STREAM_READ); | ||
| glBindBuffer(GL_PIXEL_PACK_BUFFER, 0); | ||
| } | ||
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| void GL_ShutdownCapturePBO() | ||
| { | ||
| if (g_CapturePBO) | ||
| { | ||
| glDeleteBuffers(1, &g_CapturePBO); | ||
| g_CapturePBO = 0; | ||
| } | ||
| } | ||
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| void GL_ShutdownCaptureSyncObject() | ||
| { | ||
| if (g_CaptureSyncObject) | ||
| { | ||
| glDeleteSync(g_CaptureSyncObject); | ||
| g_CaptureSyncObject = 0; | ||
| } | ||
| } | ||
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| void GL_BeginSyncCapture(fnGLQueryCaptureCallback callback) | ||
| { | ||
| int glwidth, glheight; | ||
| g_pMetaHookAPI->GetVideoMode(&glwidth, &glheight, NULL, NULL); | ||
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| if (glwidth != g_CaptureImageWidth || glheight != g_CaptureImageHeight) | ||
| { | ||
| GL_ShutdownCaptureImageBuffer(); | ||
| GL_InitCaptureImageBuffer(glwidth, glheight); | ||
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| g_CaptureImageWidth = glwidth; | ||
| g_CaptureImageHeight = glheight; | ||
| } | ||
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| int originalFBO = 0; | ||
| glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &originalFBO); | ||
| glBindFramebuffer(GL_READ_FRAMEBUFFER, 0); | ||
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| glReadPixels(0, 0, g_CaptureImageWidth, g_CaptureImageHeight, GL_RGB, GL_UNSIGNED_BYTE, g_CaptureImageBuffer); | ||
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| glBindFramebuffer(GL_READ_FRAMEBUFFER, originalFBO); | ||
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| GLubyte* pBuf = (GLubyte*)g_CaptureImageBuffer; | ||
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| //Flip the image up-side down | ||
| for (int y = 0; y < g_CaptureImageHeight / 2; ++y) { | ||
| for (int x = 0; x < g_CaptureImageWidth; ++x) { | ||
| byte temp[3]; | ||
| memcpy(temp, &pBuf[(g_CaptureImageHeight - y - 1) * g_CaptureImageWidth * 3 + x * 3], 3); | ||
| memcpy(&pBuf[(g_CaptureImageHeight - y - 1) * g_CaptureImageWidth * 3 + x * 3], &pBuf[y * g_CaptureImageWidth * 3 + x * 3], 3); | ||
| memcpy(&pBuf[y * g_CaptureImageWidth * 3 + x * 3], temp, 3); | ||
| } | ||
| } | ||
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| callback(g_CaptureImageBuffer, g_CaptureImageWidth * g_CaptureImageHeight * 3, g_CaptureImageWidth, g_CaptureImageHeight); | ||
| } | ||
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| void GL_BeginAsyncCapture(fnGLQueryCaptureCallback callback) | ||
| { | ||
| if (g_CaptureSyncObject) | ||
| return; | ||
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| int glwidth, glheight; | ||
| g_pMetaHookAPI->GetVideoMode(&glwidth, &glheight, NULL, NULL); | ||
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| if (glwidth != g_CaptureImageWidth || glheight != g_CaptureImageHeight) | ||
| { | ||
| GL_ShutdownCaptureImageBuffer(); | ||
| GL_ShutdownCapturePBO(); | ||
| GL_InitCapturePBO(glwidth, glheight); | ||
| GL_InitCaptureImageBuffer(glwidth, glheight); | ||
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| g_CaptureImageWidth = glwidth; | ||
| g_CaptureImageHeight = glheight; | ||
| } | ||
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| int originalFBO = 0; | ||
| int originalPBO = 0; | ||
| glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &originalFBO); | ||
| glGetIntegerv(GL_PIXEL_PACK_BUFFER_BINDING, &originalPBO); | ||
| glBindFramebuffer(GL_READ_FRAMEBUFFER, 0); | ||
| glBindBuffer(GL_PIXEL_PACK_BUFFER, g_CapturePBO); | ||
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| glReadPixels(0, 0, g_CaptureImageWidth, g_CaptureImageHeight, GL_RGB, GL_UNSIGNED_BYTE, 0); | ||
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| g_CaptureSyncObject = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0); | ||
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| glBindBuffer(GL_PIXEL_PACK_BUFFER, originalPBO); | ||
| glBindFramebuffer(GL_READ_FRAMEBUFFER, originalFBO); | ||
| } | ||
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| void GL_BeginCapture(fnGLQueryCaptureCallback callback) | ||
| { | ||
| return g_pfnBeginCapture(callback); | ||
| } | ||
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| void GL_QueryAsyncCapture(fnGLQueryCaptureCallback callback) | ||
| { | ||
| if (!g_CaptureSyncObject) | ||
| return; | ||
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| GLenum wait = glClientWaitSync(g_CaptureSyncObject, GL_SYNC_FLUSH_COMMANDS_BIT, 0); | ||
| if (wait == GL_ALREADY_SIGNALED || wait == GL_CONDITION_SATISFIED) | ||
| { | ||
| int originalPBO = 0; | ||
| glGetIntegerv(GL_PIXEL_PACK_BUFFER_BINDING, &originalPBO); | ||
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| glBindBuffer(GL_PIXEL_PACK_BUFFER, g_CapturePBO); | ||
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| GLubyte* ptr = (GLubyte*)glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY); | ||
| if (ptr) | ||
| { | ||
| memcpy(g_CaptureImageBuffer, ptr, g_CaptureImageWidth * g_CaptureImageHeight * 3); | ||
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| GLubyte* pBuf = (GLubyte*)g_CaptureImageBuffer; | ||
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| //Flip the image up-side down | ||
| for (int y = 0; y < g_CaptureImageHeight / 2; ++y) { | ||
| for (int x = 0; x < g_CaptureImageWidth; ++x) { | ||
| byte temp[3]; | ||
| memcpy(temp, &pBuf[(g_CaptureImageHeight - y - 1) * g_CaptureImageWidth * 3 + x * 3], 3); | ||
| memcpy(&pBuf[(g_CaptureImageHeight - y - 1) * g_CaptureImageWidth * 3 + x * 3], &pBuf[y * g_CaptureImageWidth * 3 + x * 3], 3); | ||
| memcpy(&pBuf[y * g_CaptureImageWidth * 3 + x * 3], temp, 3); | ||
| } | ||
| } | ||
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| callback(g_CaptureImageBuffer, g_CaptureImageWidth * g_CaptureImageHeight * 3, g_CaptureImageWidth, g_CaptureImageHeight); | ||
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| glUnmapBuffer(GL_PIXEL_PACK_BUFFER); | ||
| } | ||
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| glBindBuffer(GL_PIXEL_PACK_BUFFER, originalPBO); | ||
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| glDeleteSync(g_CaptureSyncObject); | ||
| g_CaptureSyncObject = 0; | ||
| } | ||
| } | ||
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| void GL_ShutdownCapture() | ||
| { | ||
| GL_ShutdownCaptureImageBuffer(); | ||
| GL_ShutdownCapturePBO(); | ||
| GL_ShutdownCaptureSyncObject(); | ||
| } | ||
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| void GL_InitCapture() | ||
| { | ||
| g_pMetaHookAPI->GetVideoMode(&g_CaptureImageWidth, &g_CaptureImageHeight, NULL, NULL); | ||
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| if (GLEW_VERSION_3_2) | ||
| { | ||
| GL_InitCapturePBO(g_CaptureImageWidth, g_CaptureImageHeight); | ||
| g_pfnBeginCapture = GL_BeginAsyncCapture; | ||
| } | ||
| else | ||
| { | ||
| g_pfnBeginCapture = GL_BeginSyncCapture; | ||
| } | ||
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| GL_InitCaptureImageBuffer(g_CaptureImageWidth, g_CaptureImageHeight); | ||
| } |
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