The Tor Browser: gfx/qcms/qcmsint.h@97036ab72558 (annotated)

gfx/qcms/qcmsint.h@97036ab72558 (annotated)

gfx/qcms/qcmsint.h

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* vim: set ts=8 sw=8 noexpandtab: */
 #include "qcms.h"
 #include "qcmstypes.h"
 /* used as a lookup table for the output transformation.
  * we refcount them so we only need to have one around per output
  * profile, instead of duplicating them per transform */
 struct precache_output
 {
 	int ref_count;
 	/* We previously used a count of 65536 here but that seems like more
 	 * precision than we actually need.  By reducing the size we can
 	 * improve startup performance and reduce memory usage. ColorSync on
 	 * 10.5 uses 4097 which is perhaps because they use a fixed point
 	 * representation where 1. is represented by 0x1000. */
 #define PRECACHE_OUTPUT_SIZE 8192
 #define PRECACHE_OUTPUT_MAX (PRECACHE_OUTPUT_SIZE-1)
 	uint8_t data[PRECACHE_OUTPUT_SIZE];
 };
 #ifdef _MSC_VER
 #define ALIGN __declspec(align(16))
 #else
 #define ALIGN __attribute__(( aligned (16) ))
 #endif
 struct _qcms_transform {
 	float ALIGN matrix[3][4];
 	float *input_gamma_table_r;
 	float *input_gamma_table_g;
 	float *input_gamma_table_b;
 	float *input_clut_table_r;
 	float *input_clut_table_g;
 	float *input_clut_table_b;
 	uint16_t input_clut_table_length;
 	float *r_clut;
 	float *g_clut;
 	float *b_clut;
 	uint16_t grid_size;
 	float *output_clut_table_r;
 	float *output_clut_table_g;
 	float *output_clut_table_b;
 	uint16_t output_clut_table_length;
 	float *input_gamma_table_gray;
 	float out_gamma_r;
 	float out_gamma_g;
 	float out_gamma_b;
 	float out_gamma_gray;
 	uint16_t *output_gamma_lut_r;
 	uint16_t *output_gamma_lut_g;
 	uint16_t *output_gamma_lut_b;
 	uint16_t *output_gamma_lut_gray;
 	size_t output_gamma_lut_r_length;
 	size_t output_gamma_lut_g_length;
 	size_t output_gamma_lut_b_length;
 	size_t output_gamma_lut_gray_length;
 	struct precache_output *output_table_r;
 	struct precache_output *output_table_g;
 	struct precache_output *output_table_b;
 	void (*transform_fn)(struct _qcms_transform *transform, unsigned char *src, unsigned char *dest, size_t length);
 };
 struct matrix {
 	float m[3][3];
 	bool invalid;
 };
 struct qcms_modular_transform;
 typedef void (*transform_module_fn_t)(struct qcms_modular_transform *transform, float *src, float *dest, size_t length);
 struct qcms_modular_transform {
 	struct matrix matrix;
 	float tx, ty, tz;
 	float *input_clut_table_r;
 	float *input_clut_table_g;
 	float *input_clut_table_b;
 	uint16_t input_clut_table_length;
 	float *r_clut;
 	float *g_clut;
 	float *b_clut;
 	uint16_t grid_size;
 	float *output_clut_table_r;
 	float *output_clut_table_g;
 	float *output_clut_table_b;
 	uint16_t output_clut_table_length;
 	uint16_t *output_gamma_lut_r;
 	uint16_t *output_gamma_lut_g;
 	uint16_t *output_gamma_lut_b;
 	size_t output_gamma_lut_r_length;
 	size_t output_gamma_lut_g_length;
 	size_t output_gamma_lut_b_length;
 	transform_module_fn_t transform_module_fn;
 	struct qcms_modular_transform *next_transform;
 };
 typedef int32_t s15Fixed16Number;
 typedef uint16_t uInt16Number;
 typedef uint8_t uInt8Number;
 struct XYZNumber {
 	s15Fixed16Number X;
 	s15Fixed16Number Y;
 	s15Fixed16Number Z;
 };
 struct curveType {
 	uint32_t type;
 	uint32_t count;
 	float parameter[7];
 	uInt16Number data[];
 };
 struct lutmABType {
 	uint8_t num_in_channels;
 	uint8_t num_out_channels;
 	// 16 is the upperbound, actual is 0..num_in_channels.
 	uint8_t num_grid_points[16];
 	s15Fixed16Number e00;
 	s15Fixed16Number e01;
 	s15Fixed16Number e02;
 	s15Fixed16Number e03;
 	s15Fixed16Number e10;
 	s15Fixed16Number e11;
 	s15Fixed16Number e12;
 	s15Fixed16Number e13;
 	s15Fixed16Number e20;
 	s15Fixed16Number e21;
 	s15Fixed16Number e22;
 	s15Fixed16Number e23;
 	// reversed elements (for mBA)
 	bool reversed;
 	float *clut_table;
 	struct curveType *a_curves[10];
 	struct curveType *b_curves[10];
 	struct curveType *m_curves[10];
 	float clut_table_data[];
 };
 /* should lut8Type and lut16Type be different types? */
 struct lutType { // used by lut8Type/lut16Type (mft2) only
 	uint8_t num_input_channels;
 	uint8_t num_output_channels;
 	uint8_t num_clut_grid_points;
 	s15Fixed16Number e00;
 	s15Fixed16Number e01;
 	s15Fixed16Number e02;
 	s15Fixed16Number e10;
 	s15Fixed16Number e11;
 	s15Fixed16Number e12;
 	s15Fixed16Number e20;
 	s15Fixed16Number e21;
 	s15Fixed16Number e22;
 	uint16_t num_input_table_entries;
 	uint16_t num_output_table_entries;
 	float *input_table;
 	float *clut_table;
 	float *output_table;
 	float table_data[];
 };
 #if 0
 /* this is from an intial idea of having the struct correspond to the data in
  * the file. I decided that it wasn't a good idea.
  */
 struct tag_value {
 	uint32_t type;
 	union {
 		struct {
 			uint32_t reserved;
 			struct {
 				s15Fixed16Number X;
 				s15Fixed16Number Y;
 				s15Fixed16Number Z;
 			} XYZNumber;
 		} XYZType;
 	};
 }; // I guess we need to pack this?
 #endif
 #define RGB_SIGNATURE  0x52474220
 #define GRAY_SIGNATURE 0x47524159
 #define XYZ_SIGNATURE  0x58595A20
 #define LAB_SIGNATURE  0x4C616220
 struct _qcms_profile {
 	uint32_t class;
 	uint32_t color_space;
 	uint32_t pcs;
 	qcms_intent rendering_intent;
 	struct XYZNumber redColorant;
 	struct XYZNumber blueColorant;
 	struct XYZNumber greenColorant;
 	struct curveType *redTRC;
 	struct curveType *blueTRC;
 	struct curveType *greenTRC;
 	struct curveType *grayTRC;
 	struct lutType *A2B0;
 	struct lutType *B2A0;
 	struct lutmABType *mAB;
 	struct lutmABType *mBA;
 	struct matrix chromaticAdaption;
 	struct precache_output *output_table_r;
 	struct precache_output *output_table_g;
 	struct precache_output *output_table_b;
 };
 #ifdef _MSC_VER
 #define inline _inline
 #endif
 /* produces the nearest float to 'a' with a maximum error
  * of 1/1024 which happens for large values like 0x40000040 */
 static inline float s15Fixed16Number_to_float(s15Fixed16Number a)
 {
 	return ((int32_t)a)/65536.f;
 }
 static inline s15Fixed16Number double_to_s15Fixed16Number(double v)
 {
 	return (int32_t)(v*65536);
 }
 static inline float uInt8Number_to_float(uInt8Number a)
 {
 	return ((int32_t)a)/255.f;
 }
 static inline float uInt16Number_to_float(uInt16Number a)
 {
 	return ((int32_t)a)/65535.f;
 }
 void precache_release(struct precache_output *p);
 qcms_bool set_rgb_colorants(qcms_profile *profile, qcms_CIE_xyY white_point, qcms_CIE_xyYTRIPLE primaries);
 qcms_bool get_rgb_colorants(struct matrix *colorants, qcms_CIE_xyY white_point, qcms_CIE_xyYTRIPLE primaries);
 void qcms_transform_data_rgb_out_lut_sse2(qcms_transform *transform,
                                           unsigned char *src,
                                           unsigned char *dest,
                                           size_t length);
 void qcms_transform_data_rgba_out_lut_sse2(qcms_transform *transform,
                                           unsigned char *src,
                                           unsigned char *dest,
                                           size_t length);
 void qcms_transform_data_rgb_out_lut_sse1(qcms_transform *transform,
                                           unsigned char *src,
                                           unsigned char *dest,
                                           size_t length);
 void qcms_transform_data_rgba_out_lut_sse1(qcms_transform *transform,
                                           unsigned char *src,
                                           unsigned char *dest,
                                           size_t length);
 void qcms_transform_data_rgb_out_lut_altivec(qcms_transform *transform,
                                              unsigned char *src,
                                              unsigned char *dest,
                                              size_t length);
 void qcms_transform_data_rgba_out_lut_altivec(qcms_transform *transform,
                                               unsigned char *src,
                                               unsigned char *dest,
                                               size_t length);
 extern qcms_bool qcms_supports_iccv4;
 #ifdef _MSC_VER
 long __cdecl _InterlockedIncrement(long volatile *);
 long __cdecl _InterlockedDecrement(long volatile *);
 #pragma intrinsic(_InterlockedIncrement)
 #pragma intrinsic(_InterlockedDecrement)
 #define qcms_atomic_increment(x) _InterlockedIncrement((long volatile *)&x)
 #define qcms_atomic_decrement(x) _InterlockedDecrement((long volatile*)&x)
 #else
 #define qcms_atomic_increment(x) __sync_add_and_fetch(&x, 1)
 #define qcms_atomic_decrement(x) __sync_sub_and_fetch(&x, 1)
 #endif
 #ifdef NATIVE_OUTPUT
 # define RGB_OUTPUT_COMPONENTS 4
 # define RGBA_OUTPUT_COMPONENTS 4
 # ifdef IS_LITTLE_ENDIAN
 #  define OUTPUT_A_INDEX 3
 #  define OUTPUT_R_INDEX 2
 #  define OUTPUT_G_INDEX 1
 #  define OUTPUT_B_INDEX 0
 # else
 #  define OUTPUT_A_INDEX 0
 #  define OUTPUT_R_INDEX 1
 #  define OUTPUT_G_INDEX 2
 #  define OUTPUT_B_INDEX 3
 # endif
 #else
 # define RGB_OUTPUT_COMPONENTS 3
 # define RGBA_OUTPUT_COMPONENTS 4
 # define OUTPUT_R_INDEX 0
 # define OUTPUT_G_INDEX 1
 # define OUTPUT_B_INDEX 2
 # define OUTPUT_A_INDEX 3
 #endif

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gfx/qcms/qcmsint.h@97036ab72558 (annotated)

gfx/qcms/qcmsint.h