index b10ae2257b509e9e17ff6662dc6d45386ca36367..ef4e6f0b9b69634c3442b2e0bc0bda20c3da377c 100644 (file)
+{$MODE DELPHI}
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 +63,11 @@ 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);
@@ -96,19 +98,19 @@ procedure e_TextureFontPrintFmt(X, Y: GLint; Text: string; FontID: DWORD; Shadow
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;
procedure e_Clear(); overload;
procedure e_EndRender();
-procedure e_SaveGLContext();
-procedure e_RestoreGLContext();
-
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;
var
e_Colors: TRGB;
+ e_NoGraphics: Boolean = False;
+ e_FastScreenshots: Boolean = true; // it's REALLY SLOW with `false`
+
implementation
+uses
+ paszlib, crc, utils;
+
+
type
TTexture = record
//ID: DWORD;
e_Textures: array of TTexture = nil;
e_TextureFonts: array of TTextureFont = nil;
e_CharFonts: array of TCharFont;
- e_SavedTextures: array of TSavedTexture;
+ //e_SavedTextures: array of TSavedTexture;
//------------------------------------------------------------------
// Èíèöèàëèçèðóåò OpenGL
//------------------------------------------------------------------
procedure e_InitGL();
begin
- glDisable(GL_DEPTH_TEST);
- glEnable(GL_SCISSOR_TEST);
+ if e_NoGraphics then
+ begin
+ e_DummyTextures := True;
+ Exit;
+ end;
e_Colors.R := 255;
e_Colors.G := 255;
e_Colors.B := 255;
+ glDisable(GL_DEPTH_TEST);
+ glEnable(GL_SCISSOR_TEST);
glClearColor(0, 0, 0, 0);
end;
mat: Array [0..15] of GLDouble;
begin
+ if e_NoGraphics then Exit;
glLoadIdentity();
glScissor(X, Y, Width, Height);
glViewport(X, Y, Width, Height);
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].Width, e_Textures[find_id].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;
+ if not LoadTextureMemEx(pData, dataSize, e_Textures[find_id].tx, fX, fY, fWidth, fHeight, @fmt) then exit;
e_Textures[find_id].Width := fWidth;
e_Textures[find_id].Height := fHeight;
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;
+ //writeln(' tw=', tw, '; th=', th);
+ e_Textures[find_id].Width := tw;
+ e_Textures[find_id].Height := th;
+ e_Textures[find_id].Fmt := fmt;
+ ID := find_id;
+ result := True;
+end;
+
procedure e_GetTextureSize(ID: DWORD; Width, Height: PWord);
begin
if Width <> nil then Width^ := e_Textures[ID].Width;
begin
w := e_Textures[ID].Width;
h := e_Textures[ID].Height;
- data := GetMemory(w*h*4);
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
- glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
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);
+ glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+
for y := h-1 downto 0 do
begin
lastline := y;
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
@@ -491,6 +525,7 @@ procedure e_DrawSize(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolea
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
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
procedure e_DrawFill(ID: DWORD; X, Y: Integer; XCount, YCount: Word; Alpha: Integer;
AlphaChannel: Boolean; Blending: Boolean);
var
- X2, Y2, dx, dy, w, h: Integer;
+ X2, Y2, dx, w, h: Integer;
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
@@ -660,6 +697,7 @@ procedure e_DrawAdv(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean
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
procedure e_DrawPoint(Size: Byte; X, Y: Integer; Red, Green, Blue: Byte);
begin
+ if e_NoGraphics then Exit;
glDisable(GL_TEXTURE_2D);
glColor3ub(Red, Green, Blue);
glPointSize(Size);
@@ -766,6 +805,7 @@ procedure e_DrawQuad(X1, Y1, X2, Y2: Integer; Red, Green, Blue: Byte; Alpha: Byt
var
nX1, nY1, nX2, nY2: Integer;
begin
+ if e_NoGraphics then Exit;
// Only top-left/bottom-right quad
if X1 > X2 then
begin
procedure e_DrawFillQuad(X1, Y1, X2, Y2: Integer; Red, Green, Blue, Alpha: Byte;
Blending: TBlending = B_NONE);
begin
+ if e_NoGraphics then Exit;
if (Alpha > 0) or (Blending <> B_NONE) then
glEnable(GL_BLEND)
else
procedure e_DrawLine(Width: Byte; X1, Y1, X2, Y2: Integer; Red, Green, Blue: Byte; Alpha: Byte = 0);
begin
+ if e_NoGraphics then Exit;
// Pixel-perfect lines
if Width = 1 then
e_LineCorrection(X1, Y1, X2, Y2);
//------------------------------------------------------------------
procedure e_DeleteTexture(ID: DWORD);
begin
- glDeleteTextures(1, @e_Textures[ID].tx.id);
+ 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;
procedure e_BeginRender();
begin
+ if e_NoGraphics then Exit;
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_GREATER, 0.0);
end;
procedure e_Clear(Mask: TGLbitfield; Red, Green, Blue: Single); overload;
begin
- glClearColor(Red, Green, Blue, 0);
- glClear(Mask);
+ if e_NoGraphics then Exit;
+ glClearColor(Red, Green, Blue, 0);
+ glClear(Mask);
end;
procedure e_Clear(); overload;
begin
- glClearColor(0, 0, 0, 0);
- glClear(GL_COLOR_BUFFER_BIT);
+ if e_NoGraphics then Exit;
+ glClearColor(0, 0, 0, 0);
+ glClear(GL_COLOR_BUFFER_BIT);
end;
procedure e_EndRender();
begin
+ if e_NoGraphics then Exit;
glPopMatrix();
end;
-procedure e_MakeScreenshot(FileName: String; Width, Height: Word);
-begin
-end;
-
-{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 (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;
-
- 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;
A, B: double;
i, j: integer;
begin
+ Result := 0;
+ if e_NoGraphics then Exit;
rgb[0] := 1.0;
rgb[1] := 1.0;
rgb[2] := 1.0;
r: double;
g: double;
begin
+ if e_NoGraphics then Exit;
g := (100 - Gamma)*(2.7 - 0.23)/100 + 0.23;
for i := 0 to 255 do
var
a: Integer;
begin
+ if e_NoGraphics then Exit;
if Text = '' then Exit;
if e_CharFonts = nil then Exit;
if Integer(FontID) > High(e_CharFonts) then Exit;
a: Integer;
c: TRGB;
begin
+ if e_NoGraphics then Exit;
if Text = '' then Exit;
if e_CharFonts = nil then Exit;
if Integer(FontID) > High(e_CharFonts) then Exit;
tc, c: TRGB;
w, h: Word;
begin
+ if e_NoGraphics then Exit;
if Text = '' then Exit;
if e_CharFonts = nil then Exit;
if Integer(FontID) > High(e_CharFonts) then Exit;
cx, cy : real;
i, id: DWORD;
begin
+ if e_NoGraphics then Exit;
e_WriteLog('Creating texture font...', MSG_NOTIFY);
id := DWORD(-1);
FontID := id;
end;
-procedure e_TextureFontBuildInPlace(id: DWORD);
-var
- loop1 : GLuint;
- cx, cy : real;
- XCount, YCount, Space: Integer;
- {i,} Tex: DWORD;
-begin
- with e_TextureFonts[id] do
- begin
- Base := glGenLists(XC*YC);
- TextureID := e_Textures[Texture].tx.id;
- XCount := XC;
- YCount := YC;
- Space := SPC;
- Tex := Texture;
- end;
-
- glBindTexture(GL_TEXTURE_2D, e_Textures[Tex].tx.id);
- for loop1 := 0 to XCount*YCount-1 do
- begin
- cx := (loop1 mod XCount)/XCount;
- cy := (loop1 div YCount)/YCount;
-
- 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);
-
- glTexCoord2f(cx+1/XCount, 1.0-cy-1/YCount);
- glVertex2i(e_Textures[Tex].Width div XCount, e_Textures[Tex].Height div YCount);
-
- glTexCoord2f(cx+1/XCount, 1.0-cy);
- glVertex2i(e_Textures[Tex].Width div XCount, 0);
-
- glTexCoord2f(cx, 1.0-cy);
- glVertex2i(0, 0);
- glEnd();
- glTranslated((e_Textures[Tex].Width div XCount)+Space, 0, 0);
- glEndList();
- end;
-end;
-
procedure e_TextureFontKill(FontID: DWORD);
begin
+ if e_NoGraphics then Exit;
glDeleteLists(e_TextureFonts[FontID].Base, 256);
e_TextureFonts[FontID].Base := 0;
end;
procedure e_TextureFontPrint(X, Y: GLint; Text: string; FontID: DWORD);
begin
+ if e_NoGraphics then Exit;
if Integer(FontID) > High(e_TextureFonts) then Exit;
if Text = '' then Exit;
// god forgive me for this, but i cannot figure out how to do it without lists
procedure e_TextureFontPrintChar(X, Y: Integer; Ch: Char; FontID: DWORD; Shadow: Boolean = False);
begin
+ if e_NoGraphics then Exit;
glPushMatrix;
if Shadow then
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;
tc, c: TRGB;
w: Word;
begin
+ if e_NoGraphics then Exit;
if Text = '' then Exit;
if e_TextureFonts = nil then Exit;
if Integer(FontID) > High(e_TextureFonts) then Exit;
procedure e_TextureFontPrintEx(X, Y: GLint; Text: string; FontID: DWORD; Red, Green,
Blue: Byte; Scale: Single; Shadow: Boolean = False);
begin
+ if e_NoGraphics then Exit;
if Text = '' then Exit;
glPushMatrix;
procedure e_TextureFontGetSize(ID: DWORD; var CharWidth, CharHeight: Byte);
begin
+ CharWidth := 16;
+ CharHeight := 16;
+ if e_NoGraphics then Exit;
if Integer(ID) > High(e_TextureFonts) then
Exit;
CharWidth := e_TextureFonts[ID].CharWidth;
var
i: integer;
begin
+ if e_NoGraphics then Exit;
if e_TextureFonts = nil then Exit;
for i := 0 to High(e_TextureFonts) do
e_TextureFonts := nil;
end;
-procedure e_SaveGLContext();
-var
- PxLen: Cardinal;
- i: Integer;
-begin
- e_WriteLog('Backing up GL context:', MSG_NOTIFY);
-
- glPushAttrib(GL_ALL_ATTRIB_BITS);
- glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS);
-
- if e_Textures <> nil then
- begin
- e_WriteLog(' Backing up textures...', MSG_NOTIFY);
- SetLength(e_SavedTextures, Length(e_Textures));
- for i := Low(e_Textures) to High(e_Textures) do
- begin
- e_SavedTextures[i].Pixels := nil;
- if e_Textures[i].Width > 0 then
- begin
- with e_SavedTextures[i] do
- begin
- PxLen := 3;
- if e_Textures[i].Fmt = GL_RGBA then Inc(PxLen);
- Pixels := GetMem(PxLen * e_Textures[i].Width * e_Textures[i].Height);
- glBindTexture(GL_TEXTURE_2D, e_Textures[i].tx.id);
- glGetTexImage(GL_TEXTURE_2D, 0, e_Textures[i].Fmt, GL_UNSIGNED_BYTE, Pixels);
- glBindTexture(GL_TEXTURE_2D, 0);
- OldID := e_Textures[i].tx.id;
- TexId := i;
- end;
- end;
- end;
- end;
-
- if e_TextureFonts <> nil then
- begin
- e_WriteLog(' Releasing texturefonts...', MSG_NOTIFY);
- for i := 0 to High(e_TextureFonts) do
- if e_TextureFonts[i].Base <> 0 then
- begin
- glDeleteLists(e_TextureFonts[i].Base, 256);
- e_TextureFonts[i].Base := 0;
- end;
- end;
-end;
-
-procedure e_RestoreGLContext();
-var
- GLID: GLuint;
- i: Integer;
-begin
- e_WriteLog('Restoring GL context:', MSG_NOTIFY);
-
- glPopClientAttrib();
- glPopAttrib();
-
- if e_SavedTextures <> nil then
- begin
- e_WriteLog(' Regenerating textures...', MSG_NOTIFY);
- for i := Low(e_SavedTextures) to High(e_SavedTextures) do
- begin
- if e_SavedTextures[i].Pixels <> nil then
- with e_SavedTextures[i] do
- begin
- CreateTexture(e_Textures[TexID].tx, e_Textures[TexID].Width, e_Textures[TexID].Height, e_Textures[TexID].Fmt, Pixels);
- //GLID := CreateTexture(e_Textures[TexID].Width, e_Textures[TexID].Height, e_Textures[TexID].Fmt, Pixels);
- //e_Textures[TexID].tx := GLID;
- FreeMem(Pixels);
- end;
- end;
- end;
-
- if e_TextureFonts <> nil then
- begin
- e_WriteLog(' Regenerating texturefonts...', MSG_NOTIFY);
- for i := Low(e_TextureFonts) to High(e_TextureFonts) do
- with e_TextureFonts[i] do
- begin
- TextureID := e_Textures[Texture].tx.id;
- Base := 0;
- e_TextureFontBuildInPlace(i);
- end;
- end;
-
- SetLength(e_SavedTextures, 0);
-end;
-
-
function _RGB(Red, Green, Blue: Byte): TRGB;
begin
Result.R := Red;
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 := 0;
+ 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.