glrage: make .jpg screenshots

meson.build

@@ -221,7 +221,6 @@ sources = [
   'src/glrage/ContextImpl.cpp',
   'src/glrage/GLRage.cpp',
   'src/glrage/Interop.cpp',
-  'src/glrage/Screenshot.cpp',
   'src/glrage_gl/Buffer.cpp',
   'src/glrage_gl/Program.cpp',
   'src/glrage_gl/Sampler.cpp',

src/ddraw/DirectDrawSurface.cpp

@@ -83,7 +83,7 @@ HRESULT DirectDrawSurface::Blt(
 
             gl::Screenshot::capture(
                 buffer, width, height, depth, GL_BGRA,
-                GL_UNSIGNED_INT_8_8_8_8_REV);
+                GL_UNSIGNED_INT_8_8_8_8_REV, false);
 
             Blitter::Rect srcRect { 0, height, width, 0 };
 

src/game/output.c

@@ -856,3 +856,8 @@ void Output_ApplyWaterEffect(float *r, float *g, float *b)
         *b *= m_WaterColor.b;
     }
 }
+
+bool Output_MakeScreenshot(const char *path)
+{
+    return S_Output_MakeScreenshot(path);
+}

src/game/output.h

@@ -71,4 +71,6 @@ void Output_AnimateTextures(int32_t ticks);
 
 void Output_ApplyWaterEffect(float *r, float *g, float *b);
 
+bool Output_MakeScreenshot(const char *path);
+
 #endif

src/game/shell.c

@@ -2,6 +2,7 @@
 
 #include "3dsystem/phd_math.h"
 #include "config.h"
+#include "filesystem.h"
 #include "game/clock.h"
 #include "game/demo.h"
 #include "game/fmv.h"
@@ -186,3 +187,16 @@ void Shell_Wait(int nticks)
         Input_Update();
     }
 }
+
+bool Shell_MakeScreenshot()
+{
+    char path[20];
+    for (int i = 0; i < 10000; i++) {
+        sprintf(path, "screenshot%04d.jpg", i);
+        if (File_Exists(path)) {
+            continue;
+        }
+        return Output_MakeScreenshot(path);
+    }
+    return false;
+}

src/game/shell.h

@@ -1,9 +1,12 @@
 #ifndef T1M_GAME_SHELL_H
 #define T1M_GAME_SHELL_H
 
+#include <stdbool.h>
+
 void Shell_Main();
 void Shell_ExitSystem(const char *message);
 void Shell_ExitSystemFmt(const char *fmt, ...);
 void Shell_Wait(int nticks);
+bool Shell_MakeScreenshot();
 
 #endif

src/glrage/Context.hpp

@@ -28,6 +28,7 @@ public:
     virtual bool isRendered() = 0;
     virtual HWND getHWnd() = 0;
     virtual std::string getBasePath() = 0;
+    virtual void scheduleScreenshot(const std::string &path) = 0;
 
     virtual ~Context() = default;
 };

src/glrage/ContextImpl.cpp

@@ -1,5 +1,6 @@
 #include "glrage/ContextImpl.hpp"
 
+#include "glrage_gl/Screenshot.hpp"
 #include "glrage_gl/gl_core_3_3.h"
 #include "glrage_gl/wgl_ext.h"
 #include "glrage_util/ErrorUtils.hpp"
@@ -109,17 +110,6 @@ LRESULT
 ContextImpl::windowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     switch (msg) {
-    // Printscreen on Windows with OpenGL doesn't work in fullscreen, so
-    // hook the key and implement screenshot saving to files.
-    // For some reason, VK_SNAPSHOT doesn't generate WM_KEYDOWN events but
-    // only WM_KEYUP. Works just as well, though.
-    case WM_KEYUP:
-        if (wParam == VK_SNAPSHOT) {
-            m_screenshot.schedule(true);
-            return TRUE;
-        }
-        break;
-
     // force default handling for some window messages when in windowed
     // mode, especially important for Tomb Raider
     case WM_MOVE:
@@ -223,11 +213,9 @@ void ContextImpl::swapBuffers()
 {
     glFinish();
 
-    try {
+    if (!m_screenshotScheduledPath.empty()) {
-        m_screenshot.captureScheduled();
+        gl::Screenshot::capture(m_screenshotScheduledPath);
-    } catch (const std::exception &ex) {
+        m_screenshotScheduledPath.clear();
-        ErrorUtils::warning("Can't capture screenshot", ex);
-        m_screenshot.schedule(false);
     }
 
     SwapBuffers(m_hdc);
@@ -270,4 +258,9 @@ std::string ContextImpl::getBasePath()
     return path;
 }
 
+void ContextImpl::scheduleScreenshot(const std::string &path)
+{
+    m_screenshotScheduledPath = path;
+}
+
 }

src/glrage/ContextImpl.hpp

@@ -1,7 +1,6 @@
 #pragma once
 
 #include "glrage/Context.hpp"
-#include "glrage/Screenshot.hpp"
 
 namespace glrage {
 
@@ -30,6 +29,7 @@ public:
     bool isRendered();
     HWND getHWnd();
     std::string getBasePath();
+    void scheduleScreenshot(const std::string &path);
 
 private:
     ContextImpl();
@@ -66,9 +66,6 @@ private:
     // rendering flag
     bool m_render = false;
 
-    // screenshot object
-    Screenshot m_screenshot;
-
     // DirectDraw display mode
     int32_t m_displayWidth = 0;
     int32_t m_displayHeight = 0;
@@ -80,6 +77,9 @@ private:
     // Window size, controlled by SDL
     int32_t m_windowWidth = 0;
     int32_t m_windowHeight = 0;
+
+    // whether to capture screenshot on next redraw
+    std::string m_screenshotScheduledPath;
 };
 
 }

src/glrage/Interop.cpp

@@ -27,3 +27,10 @@ void GLRage_SetWindowSize(int width, int height)
     auto &context = GLRage::getContext();
     context.setWindowSize(width, height);
 }
+
+bool GLRage_MakeScreenshot(const char *path)
+{
+    auto &context = GLRage::getContext();
+    context.scheduleScreenshot(std::string(path));
+    return true;
+}

src/glrage/Interop.hpp

@@ -14,6 +14,8 @@ void GLRage_Detach();
 void GLRage_SetFullscreen(bool fullscreen);
 void GLRage_SetWindowSize(int width, int height);
 
+bool GLRage_MakeScreenshot(const char *path);
+
 #ifdef __cplusplus
 }
 #endif

src/glrage/Screenshot.cpp

@@ -1,51 +0,0 @@
-#include "glrage/Screenshot.hpp"
-
-#include "glrage/ContextImpl.hpp"
-#include "glrage_gl/Screenshot.hpp"
-#include "glrage_util/StringUtils.hpp"
-
-#include <cstdint>
-#include <exception>
-#include <fstream>
-#include <stdexcept>
-#include <string>
-#include <vector>
-
-namespace glrage {
-
-void Screenshot::schedule(bool schedule)
-{
-    m_schedule = schedule;
-}
-
-void Screenshot::captureScheduled()
-{
-    if (m_schedule) {
-        capture();
-        m_schedule = false;
-    }
-}
-
-void Screenshot::capture()
-{
-    // find unused screenshot file name
-    std::string basePath = ContextImpl::instance().getBasePath();
-    std::string path;
-    DWORD dwAttrib;
-    do {
-        std::string fileName =
-            StringUtils::format("screenshot%04d.tga", m_index++);
-        path = basePath + "\\" + fileName;
-        dwAttrib = GetFileAttributes(path.c_str());
-    } while (dwAttrib != INVALID_FILE_ATTRIBUTES && m_index < 9999);
-
-    // rather unlikely, but better safe than sorry
-    if (dwAttrib != INVALID_FILE_ATTRIBUTES) {
-        throw std::runtime_error("All available screenshot slots are used up!");
-    }
-
-    // actual capture
-    gl::Screenshot::capture(path);
-}
-
-}

src/glrage/Screenshot.hpp

@@ -1,18 +0,0 @@
-#pragma once
-
-#include <cstdint>
-
-namespace glrage {
-
-class Screenshot {
-public:
-    void schedule(bool schedule);
-    void captureScheduled();
-    void capture();
-
-private:
-    uint32_t m_index = 0;
-    bool m_schedule = false;
-};
-
-}

src/glrage_gl/Screenshot.cpp

@@ -3,6 +3,11 @@
 #include "glrage_util/ErrorUtils.hpp"
 #include "glrage_util/StringUtils.hpp"
 
+extern "C" {
+#include "memory.h"
+#include "game/picture.h"
+}
+
 #include <algorithm>
 #include <cstdint>
 #include <exception>
@@ -14,46 +19,34 @@
 namespace glrage {
 namespace gl {
 
-// heavily simplified Targa header struct for raw BGR(A) data
+bool Screenshot::capture(const std::string &path)
-struct TGAHeader {
-    uint8_t blank1[2];
-    uint8_t format;
-    uint8_t blank2[9];
-    uint16_t width;
-    uint16_t height;
-    uint8_t depth;
-    uint8_t blank3;
-};
-
-void Screenshot::capture(const std::string &path)
 {
-    // open screenshot file
+    bool ret = false;
-    std::ofstream file(path, std::ofstream::binary);
-    if (!file.good()) {
-        throw std::runtime_error(
-            "Can't open screenshot file '" + path
-            + "': " + ErrorUtils::getSystemErrorString());
-    }
 
-    // copy framebuffer to local buffer
     GLint width;
     GLint height;
-    GLint depth = 3;
-
     std::vector<uint8_t> buffer;
-    capture(buffer, width, height, depth, GL_BGR, GL_UNSIGNED_BYTE, false);
 
-    // create Targa header
+    Screenshot::capture(
-    TGAHeader tgaHeader = { { 0, 0 }, 0, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0, 0,
+        buffer, width, height, 3, GL_RGB, GL_UNSIGNED_BYTE, true);
-                            0,        0 };
-    tgaHeader.format = 2;
-    tgaHeader.width = width;
-    tgaHeader.height = height;
-    tgaHeader.depth = depth * 8;
 
-    file.write(reinterpret_cast<char *>(&tgaHeader), sizeof(TGAHeader));
+    PICTURE *pic = Picture_Create();
-    file.write(reinterpret_cast<char *>(&buffer[0]), buffer.size());
+    if (!pic) {
-    file.close();
+        goto cleanup;
+    }
+    pic->width = width;
+    pic->height = height;
+    pic->data = static_cast<RGB888 *>(Memory_Alloc(width * height * 3));
+    std::copy(
+        buffer.begin(), buffer.end(), reinterpret_cast<uint8_t *>(pic->data));
+
+    ret = Picture_SaveToFile(pic, path.c_str());
+
+cleanup:
+    if (pic) {
+        Picture_Free(pic);
+    }
+    return ret;
 }
 
 void Screenshot::capture(

src/glrage_gl/Screenshot.hpp

@@ -11,10 +11,10 @@ namespace gl {
 
 class Screenshot {
 public:
-    static void capture(const std::string &path);
+    static bool capture(const std::string &path);
     static void capture(
         std::vector<uint8_t> &buffer, GLint &width, GLint &height, GLint depth,
-        GLenum format, GLenum type, bool vflip = false);
+        GLenum format, GLenum type, bool vflip);
 };
 
 }

src/specific/s_output.c

@@ -1543,3 +1543,8 @@ void S_Output_DownloadTextures(int32_t pages)
 
     m_SelectedTexture = -1;
 }
+
+bool S_Output_MakeScreenshot(const char *path)
+{
+    return GLRage_MakeScreenshot(path);
+}

src/specific/s_output.h

@@ -54,4 +54,6 @@ void S_Output_DrawLightningSegment(
     int x1, int y1, int z1, int thickness1, int x2, int y2, int z2,
     int thickness2);
 
+bool S_Output_MakeScreenshot(const char *path);
+
 #endif

src/specific/s_shell.c

@@ -87,6 +87,13 @@ void S_Shell_SpinMessageLoop()
             break;
         }
 
+        case SDL_KEYUP:
+            if (event.key.keysym.sym == SDLK_PRINTSCREEN) {
+                Shell_MakeScreenshot();
+                break;
+            }
+            break;
+
         case SDL_WINDOWEVENT:
             switch (event.window.event) {
             case SDL_WINDOWEVENT_FOCUS_GAINED: