index f2afd54004adf64ac075f26888dab9c23298e371..39b6e4330ef71754142a013ee8807501c97805ff 100644 (file)
+(* Copyright (C) DooM 2D:Forever Developers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *)
+{$INCLUDE e_amodes.inc}
unit e_graphics;
interface
uses
- SysUtils, Math, e_log, e_textures, SDL2, GL, GLExt, MAPDEF;
+ SysUtils, Classes, Math, e_log, e_textures, SDL2, GL, GLExt, MAPDEF, ImagingTypes, Imaging, ImagingUtility;
type
TMirrorType=(M_NONE, M_HORIZONTAL, M_VERTICAL);
@@ -62,10 +78,11 @@ procedure e_DrawQuad(X1, Y1, X2, Y2: Integer; Red, Green, Blue: Byte; Alpha: Byt
procedure e_DrawFillQuad(X1, Y1, X2, Y2: Integer; Red, Green, Blue, Alpha: Byte;
Blending: TBlending = B_NONE);
+function e_CreateTextureImg (var img: TImageData; var ID: DWORD): Boolean;
function e_CreateTexture(FileName: string; var ID: DWORD): Boolean;
function e_CreateTextureEx(FileName: string; var ID: DWORD; fX, fY, fWidth, fHeight: Word): Boolean;
-function e_CreateTextureMem(pData: Pointer; var ID: DWORD): Boolean;
-function e_CreateTextureMemEx(pData: Pointer; var ID: DWORD; fX, fY, fWidth, fHeight: Word): Boolean;
+function e_CreateTextureMem(pData: Pointer; dataSize: LongInt; var ID: DWORD): Boolean;
+function e_CreateTextureMemEx(pData: Pointer; dataSize: LongInt; var ID: DWORD; fX, fY, fWidth, fHeight: Word): Boolean;
procedure e_GetTextureSize(ID: DWORD; Width, Height: PWord);
function e_GetTextureSize2(ID: DWORD): TRectWH;
procedure e_DeleteTexture(ID: DWORD);
procedure e_TextureFontGetSize(ID: DWORD; var CharWidth, CharHeight: Byte);
procedure e_RemoveAllTextureFont();
+function e_TextureFontCharWidth (ch: Char; FontID: DWORD): Integer;
+procedure e_TextureFontPrintCharEx (X, Y: Integer; Ch: Char; FontID: DWORD; Shadow: Boolean = False);
+
procedure e_ReleaseEngine();
procedure e_BeginRender();
procedure e_Clear(Mask: TGLbitfield; Red, Green, Blue: Single); overload;
function e_GetGamma(win: PSDL_Window): Byte;
procedure e_SetGamma(win: PSDL_Window;Gamma: Byte);
-procedure e_MakeScreenshot(FileName: string; Width, Height: Word);
+procedure e_MakeScreenshot(st: TStream; Width, Height: Word);
function _RGB(Red, Green, Blue: Byte): TRGB;
function _Point(X, Y: Integer): TPoint2i;
function _Rect(X, Y: Integer; Width, Height: Word): TRectWH;
function _TRect(L, T, R, B: LongInt): TRect;
+//function e_getTextGLId (ID: DWORD): GLuint;
var
e_Colors: TRGB;
e_NoGraphics: Boolean = False;
+ e_FastScreenshots: Boolean = true; // it's REALLY SLOW with `false`
+
implementation
-type
- LONG = LongInt;
- BITMAPINFOHEADER = record
- biSize : DWORD;
- biWidth : LONG;
- biHeight : LONG;
- biPlanes : WORD;
- biBitCount : WORD;
- biCompression : DWORD;
- biSizeImage : DWORD;
- biXPelsPerMeter : LONG;
- biYPelsPerMeter : LONG;
- biClrUsed : DWORD;
- biClrImportant : DWORD;
- end;
- LPBITMAPINFOHEADER = ^BITMAPINFOHEADER;
- TBITMAPINFOHEADER = BITMAPINFOHEADER;
- PBITMAPINFOHEADER = ^BITMAPINFOHEADER;
-
- RGBQUAD = record
- rgbBlue : BYTE;
- rgbGreen : BYTE;
- rgbRed : BYTE;
- rgbReserved : BYTE;
- end;
- tagRGBQUAD = RGBQUAD;
- TRGBQUAD = RGBQUAD;
- PRGBQUAD = ^RGBQUAD;
+uses
+ paszlib, crc, utils;
- BITMAPINFO = record
- bmiHeader : BITMAPINFOHEADER;
- bmiColors : array[0..0] of RGBQUAD;
- end;
- LPBITMAPINFO = ^BITMAPINFO;
- PBITMAPINFO = ^BITMAPINFO;
- TBITMAPINFO = BITMAPINFO;
-
- BITMAPFILEHEADER = packed record
- bfType : Word;
- bfSize : DWord;
- bfReserved1 : Word;
- bfReserved2 : Word;
- bfOffBits : DWord;
- end;
- tagBITMAPFILEHEADER = BITMAPFILEHEADER;
type
TTexture = record
- //ID: DWORD;
tx: GLTexture;
- Width: Word;
- Height: Word;
- Fmt: Word;
end;
TTextureFont = record
e_CharFonts: array of TCharFont;
//e_SavedTextures: array of TSavedTexture;
+//function e_getTextGLId (ID: DWORD): GLuint; begin result := e_Textures[ID].tx.id; end;
+
//------------------------------------------------------------------
// Èíèöèàëèçèðóåò OpenGL
//------------------------------------------------------------------
begin
if e_Textures <> nil then
for i := 0 to High(e_Textures) do
- if e_Textures[i].Width = 0 then
+ if e_Textures[i].tx.Width = 0 then
begin
Result := i;
Exit;
find_id := FindTexture();
- if not LoadTexture(FileName, e_Textures[find_id].tx, e_Textures[find_id].Width,
- e_Textures[find_id].Height, @fmt) then Exit;
+ if not LoadTexture(FileName, e_Textures[find_id].tx, e_Textures[find_id].tx.Width,
+ e_Textures[find_id].tx.Height, @fmt) then Exit;
ID := find_id;
- e_Textures[ID].Fmt := fmt;
Result := True;
end;
if not LoadTextureEx(FileName, e_Textures[find_id].tx, fX, fY, fWidth, fHeight, @fmt) then exit;
- e_Textures[find_id].Width := fWidth;
- e_Textures[find_id].Height := fHeight;
- e_Textures[find_id].Fmt := fmt;
-
ID := find_id;
Result := True;
end;
-function e_CreateTextureMem(pData: Pointer; var ID: DWORD): Boolean;
+function e_CreateTextureMem(pData: Pointer; dataSize: LongInt; var ID: DWORD): Boolean;
var
find_id: DWORD;
fmt: Word;
find_id := FindTexture;
- if not LoadTextureMem(pData, e_Textures[find_id].tx, e_Textures[find_id].Width,
- e_Textures[find_id].Height, @fmt) then exit;
+ if not LoadTextureMem(pData, dataSize, e_Textures[find_id].tx, e_Textures[find_id].tx.Width, e_Textures[find_id].tx.Height, @fmt) then exit;
id := find_id;
- e_Textures[id].Fmt := fmt;
Result := True;
end;
-function e_CreateTextureMemEx(pData: Pointer; var ID: DWORD; fX, fY, fWidth, fHeight: Word): Boolean;
+function e_CreateTextureMemEx(pData: Pointer; dataSize: LongInt; var ID: DWORD; fX, fY, fWidth, fHeight: Word): Boolean;
var
find_id: DWORD;
fmt: Word;
find_id := FindTexture();
- if not LoadTextureMemEx(pData, e_Textures[find_id].tx, fX, fY, fWidth, fHeight, @fmt) then exit;
-
- e_Textures[find_id].Width := fWidth;
- e_Textures[find_id].Height := fHeight;
- e_Textures[find_id].Fmt := fmt;
+ if not LoadTextureMemEx(pData, dataSize, e_Textures[find_id].tx, fX, fY, fWidth, fHeight, @fmt) then exit;
ID := find_id;
Result := True;
end;
+function e_CreateTextureImg (var img: TImageData; var ID: DWORD): Boolean;
+var
+ find_id: DWORD;
+ fmt, tw, th: Word;
+begin
+ result := false;
+ find_id := FindTexture();
+ if not LoadTextureImg(img, e_Textures[find_id].tx, tw, th, @fmt) then exit;
+ ID := find_id;
+ result := True;
+end;
+
procedure e_GetTextureSize(ID: DWORD; Width, Height: PWord);
begin
- if Width <> nil then Width^ := e_Textures[ID].Width;
- if Height <> nil then Height^ := e_Textures[ID].Height;
+ if Width <> nil then Width^ := e_Textures[ID].tx.Width;
+ if Height <> nil then Height^ := e_Textures[ID].tx.Height;
end;
function e_GetTextureSize2(ID: DWORD): TRectWH;
a: Boolean;
lastline: Integer;
begin
- w := e_Textures[ID].Width;
- h := e_Textures[ID].Height;
+ w := e_Textures[ID].tx.Width;
+ h := e_Textures[ID].tx.Height;
Result.Y := 0;
Result.X := 0;
Result.Width := w;
Result.Height := h;
-
+
if e_NoGraphics then Exit;
-
+
data := GetMemory(w*h*4);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
e_SetViewPort(0, 0, Width, Height);
end;
+procedure drawTxQuad (x0, y0, w, h: Integer; u, v: single; Mirror: TMirrorType);
+var
+ x1, y1, tmp: Integer;
+begin
+ if (w < 1) or (h < 1) then exit;
+ x1 := x0+w;
+ y1 := y0+h;
+ if Mirror = M_HORIZONTAL then begin tmp := x1; x1 := x0; x0 := tmp; end
+ else if Mirror = M_VERTICAL then begin tmp := y1; y1 := y0; y0 := tmp; end;
+ glTexCoord2f(0, v); glVertex2i(x0, y0);
+ glTexCoord2f(0, 0); glVertex2i(x0, y1);
+ glTexCoord2f(u, 0); glVertex2i(x1, y1);
+ glTexCoord2f(u, v); glVertex2i(x1, y0);
+end;
+
procedure e_Draw(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
Blending: Boolean; Mirror: TMirrorType = M_NONE);
-var
- u, v: Single;
begin
if e_NoGraphics then Exit;
glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
glBegin(GL_QUADS);
- u := e_Textures[ID].tx.u;
- v := e_Textures[ID].tx.v;
+ drawTxQuad(X, Y, e_Textures[id].tx.width, e_Textures[id].tx.height, e_Textures[ID].tx.u, e_Textures[ID].tx.v, Mirror);
+ //u := e_Textures[ID].tx.u;
+ //v := e_Textures[ID].tx.v;
+
+ {
if Mirror = M_NONE then
begin
- glTexCoord2f(u, 0); glVertex2i(X + e_Textures[id].Width, Y);
+ glTexCoord2f(u, 0); glVertex2i(X + e_Textures[id].tx.Width, Y);
glTexCoord2f(0, 0); glVertex2i(X, Y);
- glTexCoord2f(0, -v); glVertex2i(X, Y + e_Textures[id].Height);
- glTexCoord2f(u, -v); glVertex2i(X + e_Textures[id].Width, Y + e_Textures[id].Height);
+ glTexCoord2f(0, -v); glVertex2i(X, Y + e_Textures[id].tx.Height);
+ glTexCoord2f(u, -v); glVertex2i(X + e_Textures[id].tx.Width, Y + e_Textures[id].tx.Height);
end
else
if Mirror = M_HORIZONTAL then
begin
glTexCoord2f(u, 0); glVertex2i(X, Y);
- glTexCoord2f(0, 0); glVertex2i(X + e_Textures[id].Width, Y);
- glTexCoord2f(0, -v); glVertex2i(X + e_Textures[id].Width, Y + e_Textures[id].Height);
- glTexCoord2f(u, -v); glVertex2i(X, Y + e_Textures[id].Height);
+ glTexCoord2f(0, 0); glVertex2i(X + e_Textures[id].tx.Width, Y);
+ glTexCoord2f(0, -v); glVertex2i(X + e_Textures[id].tx.Width, Y + e_Textures[id].tx.Height);
+ glTexCoord2f(u, -v); glVertex2i(X, Y + e_Textures[id].tx.Height);
end
else
if Mirror = M_VERTICAL then
begin
- glTexCoord2f(u, -v); glVertex2i(X + e_Textures[id].Width, Y);
+ glTexCoord2f(u, -v); glVertex2i(X + e_Textures[id].tx.Width, Y);
glTexCoord2f(0, -v); glVertex2i(X, Y);
- glTexCoord2f(0, 0); glVertex2i(X, Y + e_Textures[id].Height);
- glTexCoord2f(u, 0); glVertex2i(X + e_Textures[id].Width, Y + e_Textures[id].Height);
+ glTexCoord2f(0, 0); glVertex2i(X, Y + e_Textures[id].tx.Height);
+ glTexCoord2f(u, 0); glVertex2i(X + e_Textures[id].tx.Width, Y + e_Textures[id].tx.Height);
end;
+ }
glEnd();
procedure e_DrawSizeMirror(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
Blending: Boolean; Width, Height: Word; Mirror: TMirrorType = M_NONE);
-var
- u, v: Single;
begin
if e_NoGraphics then Exit;
glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
glBegin(GL_QUADS);
-
- u := e_Textures[ID].tx.u;
- v := e_Textures[ID].tx.v;
-
- if Mirror = M_NONE then
- begin
- glTexCoord2f(u, 0); glVertex2i(X + Width, Y);
- glTexCoord2f(0, 0); glVertex2i(X, Y);
- glTexCoord2f(0, -v); glVertex2i(X, Y + Height);
- glTexCoord2f(u, -v); glVertex2i(X + Width, Y + Height);
- end
- else
- if Mirror = M_HORIZONTAL then
- begin
- glTexCoord2f(u, 0); glVertex2i(X, Y);
- glTexCoord2f(0, 0); glVertex2i(X + Width, Y);
- glTexCoord2f(0, -v); glVertex2i(X + Width, Y + Height);
- glTexCoord2f(u, -v); glVertex2i(X, Y + Height);
- end
- else
- if Mirror = M_VERTICAL then
- begin
- glTexCoord2f(u, -v); glVertex2i(X + Width, Y);
- glTexCoord2f(0, -v); glVertex2i(X, Y);
- glTexCoord2f(0, 0); glVertex2i(X, Y + Height);
- glTexCoord2f(u, 0); glVertex2i(X + Width, Y + Height);
- end;
-
+ drawTxQuad(X, Y, Width, Height, e_Textures[ID].tx.u, e_Textures[ID].tx.v, Mirror);
glEnd();
glDisable(GL_BLEND);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
- X2 := X + e_Textures[ID].Width * XCount;
- Y2 := Y + e_Textures[ID].Height * YCount;
+ X2 := X + e_Textures[ID].tx.width * XCount;
+ Y2 := Y + e_Textures[ID].tx.height * YCount;
//k8: this SHOULD work... i hope
if (e_Textures[ID].tx.width = e_Textures[ID].tx.glwidth) and (e_Textures[ID].tx.height = e_Textures[ID].tx.glheight) then
procedure e_DrawAdv(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
Blending: Boolean; Angle: Single; RC: PPoint; Mirror: TMirrorType = M_NONE);
-var
- u, v: Single;
begin
if e_NoGraphics then Exit;
+
glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
if (Alpha > 0) or (AlphaChannel) or (Blending) then
glBindTexture(GL_TEXTURE_2D, e_Textures[id].tx.id);
glBegin(GL_QUADS); //0-1 1-1
//00 10
-
- u := e_Textures[ID].tx.u;
- v := e_Textures[ID].tx.v;
-
- if Mirror = M_NONE then
- begin
- glTexCoord2f(u, 0); glVertex2i(X + e_Textures[id].Width, Y);
- glTexCoord2f(0, 0); glVertex2i(X, Y);
- glTexCoord2f(0, -v); glVertex2i(X, Y + e_Textures[id].Height);
- glTexCoord2f(u, -v); glVertex2i(X + e_Textures[id].Width, Y + e_Textures[id].Height);
- end
- else
- if Mirror = M_HORIZONTAL then
- begin
- glTexCoord2f(u, 0); glVertex2i(X, Y);
- glTexCoord2f(0, 0); glVertex2i(X + e_Textures[id].Width, Y);
- glTexCoord2f(0, -v); glVertex2i(X + e_Textures[id].Width, Y + e_Textures[id].Height);
- glTexCoord2f(u, -v); glVertex2i(X, Y + e_Textures[id].Height);
- end
- else
- if Mirror = M_VERTICAL then
- begin
- glTexCoord2f(u, -v); glVertex2i(X + e_Textures[id].Width, Y);
- glTexCoord2f(0, -v); glVertex2i(X, Y);
- glTexCoord2f(0, 0); glVertex2i(X, Y + e_Textures[id].Height);
- glTexCoord2f(u, 0); glVertex2i(X + e_Textures[id].Width, Y + e_Textures[id].Height);
- end;
-
+ drawTxQuad(X, Y, e_Textures[id].tx.width, e_Textures[id].tx.height, e_Textures[ID].tx.u, e_Textures[ID].tx.v, Mirror);
glEnd();
if Angle <> 0 then
if not e_NoGraphics then
glDeleteTextures(1, @e_Textures[ID].tx.id);
e_Textures[ID].tx.id := 0;
- e_Textures[ID].Width := 0;
- e_Textures[ID].Height := 0;
+ e_Textures[ID].tx.Width := 0;
+ e_Textures[ID].tx.Height := 0;
end;
//------------------------------------------------------------------
if e_Textures = nil then Exit;
for i := 0 to High(e_Textures) do
- if e_Textures[i].Width <> 0 then e_DeleteTexture(i);
+ if e_Textures[i].tx.Width <> 0 then e_DeleteTexture(i);
e_Textures := nil;
end;
glPopMatrix();
end;
-procedure e_MakeScreenshot(FileName: String; Width, Height: Word);
-type
- aRGB = Array [0..1] of TRGB;
- PaRGB = ^aRGB;
- TByteArray = Array [0..1] of Byte;
- PByteArray = ^TByteArray;
-var
- FILEHEADER: BITMAPFILEHEADER;
- INFOHEADER: BITMAPINFOHEADER;
- pixels: PByteArray;
- tmp: Byte;
- i: Integer;
- F: File of Byte;
-begin
- if e_NoGraphics then Exit;
-
- if (Width mod 4) > 0 then
- Width := Width + 4 - (Width mod 4);
-
- GetMem(pixels, Width*Height*3);
- glReadPixels(0, 0, Width, Height, GL_RGB, GL_UNSIGNED_BYTE, pixels);
-
- for i := 0 to Width * Height - 1 do
- with PaRGB(pixels)[i] do
- begin
- tmp := R;
- R := B;
- B := tmp;
- end;
-
- with FILEHEADER do
- begin
- bfType := $4D42; // "BM"
- bfSize := Width*Height*3 + SizeOf(BITMAPFILEHEADER) + SizeOf(BITMAPINFOHEADER);
- bfReserved1 := 0;
- bfReserved2 := 0;
- bfOffBits := SizeOf(BITMAPFILEHEADER) + SizeOf(BITMAPINFOHEADER);
- end;
-
- with INFOHEADER do
- begin
- biSize := SizeOf(BITMAPINFOHEADER);
- biWidth := Width;
- biHeight := Height;
- biPlanes := 1;
- biBitCount := 24;
- biCompression := 0;
- biSizeImage := Width*Height*3;
- biXPelsPerMeter := 0;
- biYPelsPerMeter := 0;
- biClrUsed := 0;
- biClrImportant := 0;
- end;
-
- //writeln('shot: ', FileName);
- AssignFile(F, FileName);
- Rewrite(F);
-
- BlockWrite(F, FILEHEADER, SizeOf(FILEHEADER));
- BlockWrite(F, INFOHEADER, SizeOf(INFOHEADER));
- BlockWrite(F, pixels[0], Width*Height*3);
-
- CloseFile(F);
-
- FreeMem(pixels);
-end;
-
function e_GetGamma(win: PSDL_Window): Byte;
var
ramp: array [0..256*3-1] of Word;
begin
Base := glGenLists(XCount*YCount);
TextureID := e_Textures[Tex].tx.id;
- CharWidth := (e_Textures[Tex].Width div XCount)+Space;
- CharHeight := e_Textures[Tex].Height div YCount;
+ CharWidth := (e_Textures[Tex].tx.Width div XCount)+Space;
+ CharHeight := e_Textures[Tex].tx.Height div YCount;
XC := XCount;
YC := YCount;
Texture := Tex;
glNewList(e_TextureFonts[id].Base+loop1, GL_COMPILE);
glBegin(GL_QUADS);
glTexCoord2f(cx, 1.0-cy-1/YCount);
- glVertex2d(0, e_Textures[Tex].Height div YCount);
+ glVertex2i(0, e_Textures[Tex].tx.Height div YCount);
glTexCoord2f(cx+1/XCount, 1.0-cy-1/YCount);
- glVertex2i(e_Textures[Tex].Width div XCount, e_Textures[Tex].Height div YCount);
+ glVertex2i(e_Textures[Tex].tx.Width div XCount, e_Textures[Tex].tx.Height div YCount);
glTexCoord2f(cx+1/XCount, 1.0-cy);
- glVertex2i(e_Textures[Tex].Width div XCount, 0);
+ glVertex2i(e_Textures[Tex].tx.Width div XCount, 0);
glTexCoord2f(cx, 1.0-cy);
glVertex2i(0, 0);
glEnd();
- glTranslated((e_Textures[Tex].Width div XCount)+Space, 0, 0);
+ glTranslated((e_Textures[Tex].tx.Width div XCount)+Space, 0, 0);
glEndList();
end;
glPopMatrix;
end;
+procedure e_TextureFontPrintCharEx (X, Y: Integer; Ch: Char; FontID: DWORD; Shadow: Boolean = False);
+begin
+ glBindTexture(GL_TEXTURE_2D, e_TextureFonts[FontID].TextureID);
+ glEnable(GL_TEXTURE_2D);
+ //glListBase(DWORD(Integer(e_TextureFonts[FontID].Base)-32));
+
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glEnable(GL_BLEND);
+ e_TextureFontPrintChar(X, Y, Ch, FontID, Shadow);
+ glDisable(GL_TEXTURE_2D);
+ glDisable(GL_BLEND);
+end;
+
+function e_TextureFontCharWidth (ch: Char; FontID: DWORD): Integer;
+begin
+ result := e_TextureFonts[FontID].CharWidth;
+end;
+
procedure e_TextureFontPrintFmt(X, Y: Integer; Text: string; FontID: DWORD; Shadow: Boolean = False);
var
a, TX, TY, len: Integer;
Result.Bottom := B;
end;
+
+procedure e_MakeScreenshot (st: TStream; Width, Height: Word);
+var
+ pixels, obuf, scln, ps, pd: PByte;
+ obufsize: Integer;
+ dlen: Cardinal;
+ i, x, y, res: Integer;
+ sign: array [0..7] of Byte;
+ hbuf: array [0..12] of Byte;
+ crc: LongWord;
+ img: TImageData;
+ clr: TColor32Rec;
+begin
+ if e_NoGraphics then Exit;
+ obuf := nil;
+
+ // first, extract and pack graphics data
+ if (Width mod 4) > 0 then Width := Width+4-(Width mod 4);
+
+ GetMem(pixels, Width*Height*3);
+ try
+ FillChar(pixels^, Width*Height*3, 0);
+ glReadPixels(0, 0, Width, Height, GL_RGB, GL_UNSIGNED_BYTE, pixels);
+ //e_WriteLog('PNG: pixels read', MSG_NOTIFY);
+
+ if e_FastScreenshots then
+ begin
+ // create scanlines
+ GetMem(scln, (Width*3+1)*Height);
+ try
+ ps := pixels;
+ pd := scln;
+ Inc(ps, (Width*3)*(Height-1));
+ for i := 0 to Height-1 do
+ begin
+ pd^ := 0; // filter
+ Inc(pd);
+ Move(ps^, pd^, Width*3);
+ Dec(ps, Width*3);
+ Inc(pd, Width*3);
+ end;
+ except
+ FreeMem(scln);
+ raise;
+ end;
+ FreeMem(pixels);
+ pixels := scln;
+
+ // pack it
+ obufsize := (Width*3+1)*Height*2;
+ GetMem(obuf, obufsize);
+ try
+ while true do
+ begin
+ dlen := obufsize;
+ res := compress2(Pointer(obuf), dlen, Pointer(pixels), (Width*3+1)*Height, 9);
+ if res = Z_OK then break;
+ if res <> Z_BUF_ERROR then raise Exception.Create('can''t pack data for PNG');
+ obufsize := obufsize*2;
+ FreeMem(obuf);
+ obuf := nil;
+ GetMem(obuf, obufsize);
+ end;
+ //e_WriteLog(Format('PNG: pixels compressed from %d to %d', [Integer(Width*Height*3), Integer(dlen)]), MSG_NOTIFY);
+
+ // now write PNG
+
+ // signature
+ sign[0] := 137;
+ sign[1] := 80;
+ sign[2] := 78;
+ sign[3] := 71;
+ sign[4] := 13;
+ sign[5] := 10;
+ sign[6] := 26;
+ sign[7] := 10;
+ st.writeBuffer(sign, 8);
+ //e_WriteLog('PNG: signature written', MSG_NOTIFY);
+
+ // header
+ writeIntBE(st, LongWord(13));
+ sign[0] := 73;
+ sign[1] := 72;
+ sign[2] := 68;
+ sign[3] := 82;
+ st.writeBuffer(sign, 4);
+ crc := crc32(0, @sign, 4);
+ hbuf[0] := 0;
+ hbuf[1] := 0;
+ hbuf[2] := (Width shr 8) and $ff;
+ hbuf[3] := Width and $ff;
+ hbuf[4] := 0;
+ hbuf[5] := 0;
+ hbuf[6] := (Height shr 8) and $ff;
+ hbuf[7] := Height and $ff;
+ hbuf[8] := 8; // bit depth
+ hbuf[9] := 2; // RGB
+ hbuf[10] := 0; // compression method
+ hbuf[11] := 0; // filter method
+ hbuf[12] := 0; // no interlace
+ crc := crc32(crc, @hbuf, 13);
+ st.writeBuffer(hbuf, 13);
+ writeIntBE(st, crc);
+ //e_WriteLog('PNG: header written', MSG_NOTIFY);
+
+ // image data
+ writeIntBE(st, LongWord(dlen));
+ sign[0] := 73;
+ sign[1] := 68;
+ sign[2] := 65;
+ sign[3] := 84;
+ st.writeBuffer(sign, 4);
+ crc := crc32(0, @sign, 4);
+ crc := crc32(crc, obuf, dlen);
+ st.writeBuffer(obuf^, dlen);
+ writeIntBE(st, crc);
+ //e_WriteLog('PNG: image data written', MSG_NOTIFY);
+
+ // image data end
+ writeIntBE(st, LongWord(0));
+ sign[0] := 73;
+ sign[1] := 69;
+ sign[2] := 78;
+ sign[3] := 68;
+ st.writeBuffer(sign, 4);
+ crc := crc32(0, @sign, 4);
+ writeIntBE(st, crc);
+ //e_WriteLog('PNG: end marker written', MSG_NOTIFY);
+ finally
+ if obuf <> nil then FreeMem(obuf);
+ end;
+ end
+ else
+ begin
+ Imaging.SetOption(ImagingPNGCompressLevel, 9);
+ Imaging.SetOption(ImagingPNGPreFilter, 6);
+ InitImage(img);
+ try
+ NewImage(Width, Height, TImageFormat.ifR8G8B8, img);
+ ps := pixels;
+ //writeln(stderr, 'moving pixels...');
+ for y := Height-1 downto 0 do
+ begin
+ for x := 0 to Width-1 do
+ begin
+ clr.r := ps^; Inc(ps);
+ clr.g := ps^; Inc(ps);
+ clr.b := ps^; Inc(ps);
+ clr.a := 255;
+ SetPixel32(img, x, y, clr);
+ end;
+ end;
+ GlobalMetadata.ClearMetaItems();
+ GlobalMetadata.ClearMetaItemsForSaving();
+ //writeln(stderr, 'compressing image...');
+ if not SaveImageToStream('png', st, img) then raise Exception.Create('screenshot writing error');
+ //writeln(stderr, 'done!');
+ finally
+ FreeImage(img);
+ end;
+ end;
+ finally
+ FreeMem(pixels);
+ end;
+end;
+
+
end.