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Added new docs for SDL 1.2.1

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Sam Lantinga
2001-06-10 19:31:57 +00:00
parent c5e72a0226
commit e6f1bd6af5
371 changed files with 3272 additions and 2287 deletions
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24
docs/html/sdlpixelformat.html
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@@ -4,7 +4,7 @@
>SDL_PixelFormat</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.61
CONTENT="Modular DocBook HTML Stylesheet Version 1.64
"><LINK
REL="HOME"
TITLE="SDL Library Documentation"
@@ -73,7 +73,7 @@ NAME="SDLPIXELFORMAT"
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN2677"
NAME="AEN2756"
></A
><H2
>Name</H2
@@ -81,7 +81,7 @@ NAME="AEN2677"
><DIV
CLASS="REFSECT1"
><A
NAME="AEN2680"
NAME="AEN2759"
></A
><H2
>Structure Definition</H2
@@ -101,14 +101,14 @@ CLASS="PROGRAMLISTING"
><DIV
CLASS="REFSECT1"
><A
NAME="AEN2683"
NAME="AEN2762"
></A
><H2
>Structure Data</H2
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN2685"
NAME="AEN2764"
></A
><P
></P
@@ -258,7 +258,7 @@ VALIGN="TOP"
><DIV
CLASS="REFSECT1"
><A
NAME="AEN2724"
NAME="AEN2803"
></A
><H2
>Description</H2
@@ -383,7 +383,13 @@ printf("Pixel Color-&#62; Red: %d, Green: %d, Blue: %d. Index: %d\n",
.</PRE
></P
><P
>Pixel formats above 8-bit are an entirely different experience. They are considered to be "TrueColor" formats and the color information is stored in the pixels themselves, not in a palette (packed-pixel). The mask, shift and loss fields tell us how the color information is encoded. The mask fields allow us to isolate each color component, the shift fields tell us how far left we have to shift the masked value and the loss fields tell us for far right we have to shift the final value to convert it to a full 8-bit color component.
>Pixel formats above 8-bit are an entirely different experience. They are
considered to be "TrueColor" formats and the color information is stored in the
pixels themselves, not in a palette. The mask, shift and loss fields tell us
how the color information is encoded. The mask fields allow us to isolate each
color component, the shift fields tell us the number of bits to the right of
each component in the pixel value and the loss fields tell us the number of
bits lost from each component when packing 8-bit color component in a pixel.
<PRE
CLASS="PROGRAMLISTING"
>/* Extracting color components from a 32-bit color value */
@@ -396,7 +402,7 @@ Uint8 red, green, blue, alpha;
.
fmt=surface-&#62;format;
SDL_LockSurface(surface);
pixel=(Uint32*)surface-&#62;pixels;
pixel=*((Uint32*)surface-&#62;pixels);
SDL_UnlockSurface(surface);
/* Get Red component */
@@ -432,7 +438,7 @@ printf("Pixel Color -&#62; R: %d, G: %d, B: %d, A: %d\n", red, green, blue, a
><DIV
CLASS="REFSECT1"
><A
NAME="AEN2751"
NAME="AEN2830"
></A
><H2
>See Also</H2