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added capability to open 15, 16, 24, and 32-bit "true color" TGA images and 8-bit color mapped TGA images

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1051 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Matthew Wilber 2002-09-16 03:33:15 +00:00
parent 794887f87f
commit 343a35cc2d
1 changed files with 10 additions and 9 deletions
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19
src/add-ons/translators/tgatranslator/TGATranslator.h
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@ -40,7 +40,7 @@
#define TGA_TRANSLATOR_VERSION 100
#define TGA_IN_QUALITY 1.0
// high in quality becuase this code supports all TGA features
#define TGA_IN_CAPABILITY 0.8
#define TGA_IN_CAPABILITY 0.6
// high in capability because this code opens basically all TGAs
#define TGA_OUT_QUALITY 1.0
// high out quality because this code outputs fully standard TGAs
@ -58,11 +58,11 @@
// TGA files are stored in the Intel byte order :)
struct TGAFileHeader {
uint8 idlength; // Number of bytes in the Image ID field
uint8 idlength;
// Number of bytes in the Image ID field
uint8 colormaptype;
// 0 Has NO color-map (palette)
// 1 Has color-map (palette)
uint8 imagetype;
// 0 No Image Data Included
// 1 Uncompressed, Color-mapped image
@ -81,27 +81,25 @@ struct TGAFileHeader {
#define TGA_NOCOMP_COLORMAP 1
#define TGA_NOCOMP_TRUECOLOR 2
#define TGA_NOCOMP_BW 3
#define TGA_RLE_COLORMAP 9
#define TGA_RLE_TRUECOLOR 10
#define TGA_RLE_BW 11
// Information about the color map (palette)
// these bytes are always present, but are zero if no color map
// is present
// Information about the color map (palette). These bytes are
// always present, but are zero if no color map is present
struct TGAColorMapSpec {
uint16 firstentry; // first useful entry in the color map
uint16 length; // number of color map entries
uint8 entrysize; // number of bits per entry
};
// Information about the image data
struct TGAImageSpec {
uint16 xorigin;
uint16 yorigin;
uint16 width;
uint16 height;
uint8 depth; // pixel depth includes alpha!
uint8 depth;
// pixel depth includes alpha bits!
uint8 descriptor;
// bits 3-0: number of attribute bits per pixel
// bits 5&4: order pixels are drawn to the screen
@ -123,6 +121,9 @@ struct TGAImageSpec {
#define TGA_ORIGIN_LEFT 0
#define TGA_ORIGIN_RIGHT 1
#define TGA_DESC_BITS76 0xc0
#define TGA_DESC_ALPHABITS 0x0f
#define TGA_HEADERS_SIZE 18
class TGATranslator : public BTranslator {