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surface.c
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/*
pygame-ce - Python Game Library
Copyright (C) 2000-2001 Pete Shinners
Copyright (C) 2007 Marcus von Appen
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Pete Shinners
pete@shinners.org
*/
#define PYGAMEAPI_SURFACE_INTERNAL
#include "surface.h"
#include "palette.h"
#include "structmember.h"
#include "pgcompat.h"
#include "doc/surface_doc.h"
#include "pgbufferproxy.h"
/* stdint.h is missing from some versions of MSVC. */
#ifdef _MSC_VER
#ifndef UINT32_MAX
#define UINT32_MAX 0xFFFFFFFF
#endif
#else
#include <stdint.h>
#endif /* _MSC_VER */
typedef enum {
VIEWKIND_0D = 0,
VIEWKIND_1D = 1,
VIEWKIND_2D = 2,
VIEWKIND_3D = 3,
VIEWKIND_RED,
VIEWKIND_GREEN,
VIEWKIND_BLUE,
VIEWKIND_ALPHA
} SurfViewKind;
/* To avoid problems with non-const Py_buffer format field */
#define FormatUint8 "B"
#define FormatUint16 "=H"
#define FormatUint24 "3x"
#define FormatUint32 "=I"
typedef struct pg_bufferinternal_s {
PyObject *consumer_ref; /* A weak reference to a bufferproxy object */
Py_ssize_t mem[6]; /* Enough memory for dim 3 shape and strides */
} pg_bufferinternal;
int
pgSurface_Blit(pgSurfaceObject *dstobj, pgSurfaceObject *srcobj,
SDL_Rect *dstrect, SDL_Rect *srcrect, int blend_flags);
/* statics */
static pgSurfaceObject *
pgSurface_New2(SDL_Surface *info, int owner);
static PyObject *
surf_subtype_new(PyTypeObject *type, SDL_Surface *s, int owner);
static PyObject *
surface_new(PyTypeObject *type, PyObject *args, PyObject *kwds);
static intptr_t
surface_init(pgSurfaceObject *self, PyObject *args, PyObject *kwds);
static PyObject *
surface_str(PyObject *self);
static void
surface_dealloc(PyObject *self);
static void
surface_cleanup(pgSurfaceObject *self);
static PyObject *
surf_get_at(PyObject *self, PyObject *args);
static PyObject *
surf_set_at(PyObject *self, PyObject *const *args, Py_ssize_t nargs);
static PyObject *
surf_get_at_mapped(PyObject *self, PyObject *args);
static PyObject *
surf_map_rgb(PyObject *self, PyObject *args);
static PyObject *
surf_unmap_rgb(PyObject *self, PyObject *arg);
static PyObject *
surf_lock(PyObject *self, PyObject *args);
static PyObject *
surf_unlock(PyObject *self, PyObject *args);
static PyObject *
surf_mustlock(PyObject *self, PyObject *args);
static PyObject *
surf_get_locked(PyObject *self, PyObject *args);
static PyObject *
surf_get_locks(PyObject *self, PyObject *args);
static PyObject *
surf_get_palette(PyObject *self, PyObject *args);
static PyObject *
surf_get_palette_at(PyObject *self, PyObject *args);
static PyObject *
surf_set_palette(PyObject *self, PyObject *seq);
static PyObject *
surf_set_palette_at(PyObject *self, PyObject *args);
static PyObject *
surf_set_colorkey(pgSurfaceObject *self, PyObject *args);
static PyObject *
surf_get_colorkey(pgSurfaceObject *self, PyObject *args);
static PyObject *
surf_set_alpha(pgSurfaceObject *self, PyObject *args);
static PyObject *
surf_get_alpha(pgSurfaceObject *self, PyObject *args);
static PyObject *
surf_get_blendmode(PyObject *self, PyObject *args);
static PyObject *
surf_copy(pgSurfaceObject *self, PyObject *args);
static PyObject *
surf_convert(pgSurfaceObject *self, PyObject *args);
static PyObject *
surf_convert_alpha(pgSurfaceObject *self, PyObject *args);
static PyObject *
surf_set_clip(PyObject *self, PyObject *args);
static PyObject *
surf_get_clip(PyObject *self, PyObject *args);
static PyObject *
surf_blit(pgSurfaceObject *self, PyObject *args, PyObject *keywds);
static PyObject *
surf_blits(pgSurfaceObject *self, PyObject *args, PyObject *keywds);
static PyObject *
surf_fblits(pgSurfaceObject *self, PyObject *const *args, Py_ssize_t nargs);
static PyObject *
surf_fill(pgSurfaceObject *self, PyObject *args, PyObject *keywds);
static PyObject *
surf_scroll(PyObject *self, PyObject *args, PyObject *keywds);
static PyObject *
surf_get_abs_offset(PyObject *self, PyObject *args);
static PyObject *
surf_get_abs_parent(PyObject *self, PyObject *args);
static PyObject *
surf_get_bitsize(PyObject *self, PyObject *args);
static PyObject *
surf_get_bytesize(PyObject *self, PyObject *args);
static PyObject *
surf_get_flags(PyObject *self, PyObject *args);
static PyObject *
surf_get_height(PyObject *self, PyObject *args);
static PyObject *
surf_get_pitch(PyObject *self, PyObject *args);
static PyObject *
surf_get_rect(PyObject *self, PyObject *const *args, Py_ssize_t nargs,
PyObject *kwnames);
static PyObject *
surf_get_frect(PyObject *self, PyObject *const *args, Py_ssize_t nargs,
PyObject *kwnames);
static PyObject *
surf_get_width(PyObject *self, PyObject *args);
static PyObject *
surf_get_shifts(PyObject *self, PyObject *args);
static PyObject *
surf_set_shifts(PyObject *self, PyObject *args);
static PyObject *
surf_get_size(PyObject *self, PyObject *args);
static PyObject *
surf_get_losses(PyObject *self, PyObject *args);
static PyObject *
surf_get_masks(PyObject *self, PyObject *args);
static PyObject *
surf_set_masks(PyObject *self, PyObject *args);
static PyObject *
surf_get_offset(PyObject *self, PyObject *args);
static PyObject *
surf_get_parent(PyObject *self, PyObject *args);
static PyObject *
surf_subsurface(PyObject *self, PyObject *args);
static PyObject *
surf_get_view(PyObject *self, PyObject *args);
static PyObject *
surf_get_buffer(PyObject *self, PyObject *args);
static PyObject *
surf_get_bounding_rect(PyObject *self, PyObject *args, PyObject *kwargs);
static PyObject *
surf_get_pixels_address(PyObject *self, PyObject *closure);
static PyObject *
surf_premul_alpha(pgSurfaceObject *self, PyObject *args);
static PyObject *
surf_premul_alpha_ip(pgSurfaceObject *self, PyObject *args);
static int
_view_kind(PyObject *obj, void *view_kind_vptr);
static int
_get_buffer_0D(PyObject *obj, Py_buffer *view_p, int flags);
static int
_get_buffer_1D(PyObject *obj, Py_buffer *view_p, int flags);
static int
_get_buffer_2D(PyObject *obj, Py_buffer *view_p, int flags);
static int
_get_buffer_3D(PyObject *obj, Py_buffer *view_p, int flags);
static int
_get_buffer_red(PyObject *obj, Py_buffer *view_p, int flags);
static int
_get_buffer_green(PyObject *obj, Py_buffer *view_p, int flags);
static int
_get_buffer_blue(PyObject *obj, Py_buffer *view_p, int flags);
static int
_get_buffer_alpha(PyObject *obj, Py_buffer *view_p, int flags);
static int
_get_buffer_colorplane(PyObject *obj, Py_buffer *view_p, int flags, char *name,
Uint32 mask);
static int
_init_buffer(PyObject *surf, Py_buffer *view_p, int flags);
static void
_release_buffer(Py_buffer *view_p);
static PyObject *
_raise_get_view_ndim_error(int bitsize, SurfViewKind kind);
static SDL_Surface *
pg_DisplayFormatAlpha(SDL_Surface *surface);
static SDL_Surface *
pg_DisplayFormat(SDL_Surface *surface);
static int
_PgSurface_SrcAlpha(SDL_Surface *surf);
static PyGetSetDef surface_getsets[] = {
{"_pixels_address", (getter)surf_get_pixels_address, NULL,
"pixel buffer address (readonly)", NULL},
{"width", (getter)surf_get_width, NULL, DOC_SURFACE_WIDTH, NULL},
{"height", (getter)surf_get_height, NULL, DOC_SURFACE_HEIGHT, NULL},
{"size", (getter)surf_get_size, NULL, DOC_SURFACE_SIZE, NULL},
{NULL, NULL, NULL, NULL, NULL}};
static struct PyMethodDef surface_methods[] = {
{"get_at", surf_get_at, METH_O, DOC_SURFACE_GETAT},
{"set_at", (PyCFunction)surf_set_at, METH_FASTCALL, DOC_SURFACE_SETAT},
{"get_at_mapped", surf_get_at_mapped, METH_O, DOC_SURFACE_GETATMAPPED},
{"map_rgb", surf_map_rgb, METH_VARARGS, DOC_SURFACE_MAPRGB},
{"unmap_rgb", surf_unmap_rgb, METH_O, DOC_SURFACE_UNMAPRGB},
{"get_palette", surf_get_palette, METH_NOARGS, DOC_SURFACE_GETPALETTE},
{"get_palette_at", surf_get_palette_at, METH_VARARGS,
DOC_SURFACE_GETPALETTEAT},
{"set_palette", surf_set_palette, METH_O, DOC_SURFACE_SETPALETTE},
{"set_palette_at", surf_set_palette_at, METH_VARARGS,
DOC_SURFACE_SETPALETTEAT},
{"lock", surf_lock, METH_NOARGS, DOC_SURFACE_LOCK},
{"unlock", surf_unlock, METH_NOARGS, DOC_SURFACE_UNLOCK},
{"mustlock", surf_mustlock, METH_NOARGS, DOC_SURFACE_MUSTLOCK},
{"get_locked", surf_get_locked, METH_NOARGS, DOC_SURFACE_GETLOCKED},
{"get_locks", surf_get_locks, METH_NOARGS, DOC_SURFACE_GETLOCKS},
{"set_colorkey", (PyCFunction)surf_set_colorkey, METH_VARARGS,
DOC_SURFACE_SETCOLORKEY},
{"get_colorkey", (PyCFunction)surf_get_colorkey, METH_NOARGS,
DOC_SURFACE_GETCOLORKEY},
{"set_alpha", (PyCFunction)surf_set_alpha, METH_VARARGS,
DOC_SURFACE_SETALPHA},
{"get_alpha", (PyCFunction)surf_get_alpha, METH_NOARGS,
DOC_SURFACE_GETALPHA},
{"get_blendmode", surf_get_blendmode, METH_NOARGS,
"Return the surface's SDL 2 blend mode"},
{"copy", (PyCFunction)surf_copy, METH_NOARGS, DOC_SURFACE_COPY},
{"__copy__", (PyCFunction)surf_copy, METH_NOARGS, DOC_SURFACE_COPY},
{"__deepcopy__", (PyCFunction)surf_copy, METH_O, DOC_SURFACE_COPY},
{"convert", (PyCFunction)surf_convert, METH_VARARGS, DOC_SURFACE_CONVERT},
{"convert_alpha", (PyCFunction)surf_convert_alpha, METH_VARARGS,
DOC_SURFACE_CONVERTALPHA},
{"set_clip", surf_set_clip, METH_VARARGS, DOC_SURFACE_SETCLIP},
{"get_clip", surf_get_clip, METH_NOARGS, DOC_SURFACE_GETCLIP},
{"fill", (PyCFunction)surf_fill, METH_VARARGS | METH_KEYWORDS,
DOC_SURFACE_FILL},
{"blit", (PyCFunction)surf_blit, METH_VARARGS | METH_KEYWORDS,
DOC_SURFACE_BLIT},
{"blits", (PyCFunction)surf_blits, METH_VARARGS | METH_KEYWORDS,
DOC_SURFACE_BLITS},
{"fblits", (PyCFunction)surf_fblits, METH_FASTCALL, DOC_SURFACE_FBLITS},
{"scroll", (PyCFunction)surf_scroll, METH_VARARGS | METH_KEYWORDS,
DOC_SURFACE_SCROLL},
{"get_flags", surf_get_flags, METH_NOARGS, DOC_SURFACE_GETFLAGS},
{"get_size", surf_get_size, METH_NOARGS, DOC_SURFACE_GETSIZE},
{"get_width", surf_get_width, METH_NOARGS, DOC_SURFACE_GETWIDTH},
{"get_height", surf_get_height, METH_NOARGS, DOC_SURFACE_GETHEIGHT},
{"get_rect", (PyCFunction)surf_get_rect, METH_FASTCALL | METH_KEYWORDS,
DOC_SURFACE_GETRECT},
{"get_frect", (PyCFunction)surf_get_frect, METH_FASTCALL | METH_KEYWORDS,
DOC_SURFACE_GETFRECT},
{"get_pitch", surf_get_pitch, METH_NOARGS, DOC_SURFACE_GETPITCH},
{"get_bitsize", surf_get_bitsize, METH_NOARGS, DOC_SURFACE_GETBITSIZE},
{"get_bytesize", surf_get_bytesize, METH_NOARGS, DOC_SURFACE_GETBYTESIZE},
{"get_masks", surf_get_masks, METH_NOARGS, DOC_SURFACE_GETMASKS},
{"get_shifts", surf_get_shifts, METH_NOARGS, DOC_SURFACE_GETSHIFTS},
{"set_masks", surf_set_masks, METH_VARARGS, DOC_SURFACE_SETMASKS},
{"set_shifts", surf_set_shifts, METH_VARARGS, DOC_SURFACE_SETSHIFTS},
{"get_losses", surf_get_losses, METH_NOARGS, DOC_SURFACE_GETLOSSES},
{"subsurface", surf_subsurface, METH_VARARGS, DOC_SURFACE_SUBSURFACE},
{"get_offset", surf_get_offset, METH_NOARGS, DOC_SURFACE_GETOFFSET},
{"get_abs_offset", surf_get_abs_offset, METH_NOARGS,
DOC_SURFACE_GETABSOFFSET},
{"get_parent", surf_get_parent, METH_NOARGS, DOC_SURFACE_GETPARENT},
{"get_abs_parent", surf_get_abs_parent, METH_NOARGS,
DOC_SURFACE_GETABSPARENT},
{"get_bounding_rect", (PyCFunction)surf_get_bounding_rect,
METH_VARARGS | METH_KEYWORDS, DOC_SURFACE_GETBOUNDINGRECT},
{"get_view", surf_get_view, METH_VARARGS, DOC_SURFACE_GETVIEW},
{"get_buffer", surf_get_buffer, METH_NOARGS, DOC_SURFACE_GETBUFFER},
{"premul_alpha", (PyCFunction)surf_premul_alpha, METH_NOARGS,
DOC_SURFACE_PREMULALPHA},
{"premul_alpha_ip", (PyCFunction)surf_premul_alpha_ip, METH_NOARGS,
DOC_SURFACE_PREMULALPHAIP},
{NULL, NULL, 0, NULL}};
static PyTypeObject pgSurface_Type = {
PyVarObject_HEAD_INIT(NULL, 0).tp_name = "pygame.surface.Surface",
.tp_basicsize = sizeof(pgSurfaceObject),
.tp_dealloc = surface_dealloc,
.tp_repr = surface_str,
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_doc = DOC_SURFACE,
.tp_weaklistoffset = offsetof(pgSurfaceObject, weakreflist),
.tp_methods = surface_methods,
.tp_getset = surface_getsets,
.tp_init = (initproc)surface_init,
.tp_new = surface_new,
};
#define pgSurface_Check(x) \
(PyObject_IsInstance((x), (PyObject *)&pgSurface_Type))
static pgSurfaceObject *
pgSurface_New2(SDL_Surface *s, int owner)
{
return (pgSurfaceObject *)surf_subtype_new(&pgSurface_Type, s, owner);
}
static int
pgSurface_SetSurface(pgSurfaceObject *self, SDL_Surface *s, int owner)
{
if (!s) {
PyErr_SetString(pgExc_SDLError, SDL_GetError());
return -1;
}
if (s == self->surf) {
self->owner = owner;
return 0;
}
surface_cleanup(self);
self->surf = s;
self->owner = owner;
return 0;
}
static PyObject *
surf_subtype_new(PyTypeObject *type, SDL_Surface *s, int owner)
{
pgSurfaceObject *self;
if (!s) {
return RAISE(pgExc_SDLError, SDL_GetError());
}
self = (pgSurfaceObject *)pgSurface_Type.tp_new(type, NULL, NULL);
if (pgSurface_SetSurface(self, s, owner)) {
return NULL;
}
return (PyObject *)self;
}
static PyObject *
surface_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
pgSurfaceObject *self;
self = (pgSurfaceObject *)type->tp_alloc(type, 0);
if (self) {
self->surf = NULL;
self->owner = 0;
self->subsurface = NULL;
self->weakreflist = NULL;
self->dependency = NULL;
self->locklist = NULL;
}
return (PyObject *)self;
}
/* surface object internals */
static void
surface_cleanup(pgSurfaceObject *self)
{
if (self->surf && self->owner) {
SDL_FreeSurface(self->surf);
self->surf = NULL;
}
if (self->subsurface) {
Py_XDECREF(self->subsurface->owner);
PyMem_Free(self->subsurface);
self->subsurface = NULL;
}
if (self->dependency) {
Py_DECREF(self->dependency);
self->dependency = NULL;
}
if (self->locklist) {
Py_DECREF(self->locklist);
self->locklist = NULL;
}
self->owner = 0;
}
static void
surface_dealloc(PyObject *self)
{
if (((pgSurfaceObject *)self)->weakreflist) {
PyObject_ClearWeakRefs(self);
}
surface_cleanup((pgSurfaceObject *)self);
Py_TYPE(self)->tp_free(self);
}
static PyObject *
surface_str(PyObject *self)
{
SDL_Surface *surf = pgSurface_AsSurface(self);
if (!surf) {
return PyUnicode_FromString("<Surface(Dead Display)>");
}
PyObject *colorkey = surf_get_colorkey((pgSurfaceObject *)self, NULL);
if (colorkey == NULL) {
return NULL;
}
PyObject *global_alpha = surf_get_alpha((pgSurfaceObject *)self, NULL);
if (global_alpha == NULL) {
Py_DECREF(colorkey);
return NULL;
}
// 49 is max len of format str, plus null terminator
char format[50] = "<Surface(%dx%dx%d";
if (PyObject_IsTrue(colorkey)) {
strcat(format, ", colorkey=%S");
}
if (PyObject_IsTrue(global_alpha)) {
strcat(format, ", global_alpha=%S");
}
strcat(format, ")>");
// Because PyUnicode_FromFormat ignores extra args, if we have no colorkey,
// but alpha, we can "move up" the global alpha to this spot No need to do
// this vice-versa, as it ignores extra args
PyObject *formatted_str = PyUnicode_FromFormat(
format, surf->w, surf->h, PG_SURF_BitsPerPixel(surf),
PyObject_IsTrue(colorkey) ? colorkey : global_alpha, global_alpha);
Py_DECREF(colorkey);
Py_DECREF(global_alpha);
return formatted_str;
}
static intptr_t
surface_init(pgSurfaceObject *self, PyObject *args, PyObject *kwds)
{
Uint32 flags = 0;
int width, height;
PyObject *depth = NULL, *masks = NULL, *size = NULL;
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
SDL_Surface *surface;
SDL_PixelFormat default_format;
char *kwids[] = {"size", "flags", "depth", "masks", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|iOO", kwids, &size, &flags,
&depth, &masks)) {
return -1;
}
if (PySequence_Check(size) && PySequence_Length(size) == 2) {
if ((!pg_IntFromObjIndex(size, 0, &width)) ||
(!pg_IntFromObjIndex(size, 1, &height))) {
PyErr_SetString(PyExc_ValueError,
"size needs to be (number width, number height)");
return -1;
}
}
else {
PyErr_SetString(PyExc_ValueError,
"size needs to be (number width, number height)");
return -1;
}
if (width < 0 || height < 0) {
PyErr_SetString(pgExc_SDLError, "Invalid resolution for Surface");
return -1;
}
default_format.palette = NULL;
surface_cleanup(self);
if (depth && masks) { /* all info supplied, most errorchecking
* needed */
if (pgSurface_Check(depth)) {
PyErr_SetString(PyExc_ValueError,
"cannot pass surface for depth and color masks");
return -1;
}
if (!pg_IntFromObj(depth, &bpp)) {
PyErr_SetString(PyExc_ValueError,
"invalid bits per pixel depth argument");
return -1;
}
if (!PySequence_Check(masks) || PySequence_Length(masks) != 4) {
PyErr_SetString(PyExc_ValueError,
"masks argument must be sequence of four numbers");
return -1;
}
if (!pg_UintFromObjIndex(masks, 0, &Rmask) ||
!pg_UintFromObjIndex(masks, 1, &Gmask) ||
!pg_UintFromObjIndex(masks, 2, &Bmask) ||
!pg_UintFromObjIndex(masks, 3, &Amask)) {
PyErr_SetString(PyExc_ValueError,
"invalid mask values in masks sequence");
return -1;
}
}
else if (depth && PyNumber_Check(depth)) { /* use default masks */
if (!pg_IntFromObj(depth, &bpp)) {
PyErr_SetString(PyExc_ValueError,
"invalid bits per pixel depth argument");
return -1;
}
if (flags & PGS_SRCALPHA) {
switch (bpp) {
case 16:
Rmask = 0xF << 8;
Gmask = 0xF << 4;
Bmask = 0xF;
Amask = 0xF << 12;
break;
case 32:
Rmask = 0xFF << 16;
Gmask = 0xFF << 8;
Bmask = 0xFF;
Amask = 0xFF << 24;
break;
default:
PyErr_SetString(
PyExc_ValueError,
"no standard masks exist for given bitdepth with "
"alpha");
return -1;
}
}
else {
Amask = 0;
switch (bpp) {
case 8:
Rmask = 0;
Gmask = 0;
Bmask = 0;
break;
case 12:
Rmask = 0xFF >> 4 << 8;
Gmask = 0xFF >> 4 << 4;
Bmask = 0xFF >> 4;
break;
case 15:
Rmask = 0xFF >> 3 << 10;
Gmask = 0xFF >> 3 << 5;
Bmask = 0xFF >> 3;
break;
case 16:
Rmask = 0xFF >> 3 << 11;
Gmask = 0xFF >> 2 << 5;
Bmask = 0xFF >> 3;
break;
case 24:
case 32:
Rmask = 0xFF << 16;
Gmask = 0xFF << 8;
Bmask = 0xFF;
break;
default:
PyErr_SetString(PyExc_ValueError,
"nonstandard bit depth given");
return -1;
}
}
}
else { /* no depth or surface */
SDL_PixelFormat *pix;
if (depth && pgSurface_Check(depth)) {
pix = ((pgSurfaceObject *)depth)->surf->format;
}
else if (pg_GetDefaultWindowSurface()) {
pix = pgSurface_AsSurface(pg_GetDefaultWindowSurface())->format;
}
else {
pix = &default_format;
#if SDL_VERSION_ATLEAST(3, 0, 0)
pix->bits_per_pixel = 32;
#else
pix->BitsPerPixel = 32;
#endif
pix->Amask = 0;
pix->Rmask = 0xFF0000;
pix->Gmask = 0xFF00;
pix->Bmask = 0xFF;
}
bpp = PG_FORMAT_BitsPerPixel(pix);
if (flags & PGS_SRCALPHA) {
switch (bpp) {
case 16:
Rmask = 0xF << 8;
Gmask = 0xF << 4;
Bmask = 0xF;
Amask = 0xF << 12;
break;
case 24:
bpp = 32;
// we automatically step up to 32 if video is 24, fall
// through to case below
case 32:
Rmask = 0xFF << 16;
Gmask = 0xFF << 8;
Bmask = 0xFF;
Amask = 0xFF << 24;
break;
default:
PyErr_SetString(
PyExc_ValueError,
"no standard masks exist for given bitdepth with "
"alpha");
return -1;
}
}
else {
Rmask = pix->Rmask;
Gmask = pix->Gmask;
Bmask = pix->Bmask;
Amask = pix->Amask;
}
}
Uint32 pxformat =
SDL_MasksToPixelFormatEnum(bpp, Rmask, Gmask, Bmask, Amask);
if (pxformat == SDL_PIXELFORMAT_UNKNOWN) {
PyErr_SetString(PyExc_ValueError, "Invalid mask values");
return -1;
}
surface = PG_CreateSurface(width, height, pxformat);
if (!surface) {
PyErr_SetString(pgExc_SDLError, SDL_GetError());
return -1;
}
if (!(flags & PGS_SRCALPHA)) {
/* We ignore the error if any. */
SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_NONE);
/* When the display format has a full alpha channel (macOS right now),
* Surfaces may be created with an unreqested alpha channel, which
* could cause issues.
* pygame Surfaces are supposed to be (0, 0, 0, 255) by default.
* This is a simple fix to fill it with (0, 0, 0, 255) if necessary.
* See Github issue:
* https://github.com/pygame-community/pygame-ce/issues/796
*/
if (Amask != 0) {
SDL_FillRect(surface, NULL,
SDL_MapRGBA(surface->format, 0, 0, 0, 255));
}
}
if (SDL_ISPIXELFORMAT_INDEXED(PG_SURF_FORMATENUM(surface))) {
/* Give the surface something other than an all white palette.
* */
if (SDL_SetPaletteColors(surface->format->palette,
default_palette_colors, 0,
default_palette_size - 1) != 0) {
PyErr_SetString(pgExc_SDLError, SDL_GetError());
SDL_FreeSurface(surface);
return -1;
}
}
if (surface) {
self->surf = surface;
self->owner = 1;
self->subsurface = NULL;
}
return 0;
}
/* surface object methods */
static PyObject *
surf_get_at(PyObject *self, PyObject *position)
{
SDL_Surface *surf = pgSurface_AsSurface(self);
Uint8 *pixels = NULL;
int x, y;
Uint32 color;
Uint8 *pix;
Uint8 rgba[4] = {0, 0, 0, 255};
SURF_INIT_CHECK(surf)
if (!pg_TwoIntsFromObj(position, &x, &y)) {
return RAISE(PyExc_TypeError,
"position must be a sequence of two numbers");
}
if (x < 0 || x >= surf->w || y < 0 || y >= surf->h) {
return RAISE(PyExc_IndexError, "pixel index out of range");
}
PG_PixelFormat *format;
SDL_Palette *palette;
if (!PG_GetSurfaceDetails(surf, &format, &palette)) {
return RAISE(pgExc_SDLError, SDL_GetError());
}
int bpp = PG_FORMAT_BytesPerPixel(format);
if (bpp < 1 || bpp > 4) {
return RAISE(PyExc_RuntimeError, "invalid color depth for surface");
}
if (!pgSurface_Lock((pgSurfaceObject *)self)) {
return NULL;
}
pixels = (Uint8 *)surf->pixels;
switch (bpp) {
case 1:
color = (Uint32) * ((Uint8 *)pixels + y * surf->pitch + x);
PG_GetRGB(color, format, palette, rgba, rgba + 1, rgba + 2);
break;
case 2:
color = (Uint32) * ((Uint16 *)(pixels + y * surf->pitch) + x);
PG_GetRGBA(color, format, palette, rgba, rgba + 1, rgba + 2,
rgba + 3);
break;
case 3:
pix = ((Uint8 *)(pixels + y * surf->pitch) + x * 3);
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
color = (pix[0]) + (pix[1] << 8) + (pix[2] << 16);
#else
color = (pix[2]) + (pix[1] << 8) + (pix[0] << 16);
#endif
PG_GetRGB(color, format, palette, rgba, rgba + 1, rgba + 2);
break;
default: /* case 4: */
assert(PG_FORMAT_BytesPerPixel(format) == 4);
color = *((Uint32 *)(pixels + y * surf->pitch) + x);
PG_GetRGBA(color, format, palette, rgba, rgba + 1, rgba + 2,
rgba + 3);
break;
}
if (!pgSurface_Unlock((pgSurfaceObject *)self)) {
return NULL;
}
return pgColor_New(rgba);
}
static PyObject *
surf_set_at(PyObject *self, PyObject *const *args, Py_ssize_t nargs)
{
SDL_Surface *surf = pgSurface_AsSurface(self);
SURF_INIT_CHECK(surf)
Uint8 *pixels;
int x, y;
Uint32 color;
PyObject *rgba_obj;
Uint8 *byte_buf;
if (nargs != 2) {
return PyErr_Format(PyExc_TypeError,
"set_at takes exactly 2 arguments (%zd given)",
nargs);
}
if (!pg_TwoIntsFromObj(args[0], &x, &y)) {
return RAISE(PyExc_TypeError,
"position must be a sequence of two numbers");
}
rgba_obj = args[1];
PG_PixelFormat *format = PG_GetSurfaceFormat(surf);
if (format == NULL) {
return RAISE(pgExc_SDLError, SDL_GetError());
}
int bpp = PG_FORMAT_BytesPerPixel(format);
if (bpp < 1 || bpp > 4) {
return RAISE(PyExc_RuntimeError, "invalid color depth for surface");
}
SDL_Rect clip_rect;
if (!PG_GetSurfaceClipRect(surf, &clip_rect)) {
return RAISE(pgExc_SDLError, SDL_GetError());
}
if (x < clip_rect.x || x >= clip_rect.x + clip_rect.w || y < clip_rect.y ||
y >= clip_rect.y + clip_rect.h) {
/* out of clip area */
Py_RETURN_NONE;
}
if (!pg_MappedColorFromObj(rgba_obj, surf, &color, PG_COLOR_HANDLE_ALL)) {
return NULL;
}
if (!pgSurface_Lock((pgSurfaceObject *)self)) {
return NULL;
}
pixels = (Uint8 *)surf->pixels;
switch (bpp) {
case 1:
*((Uint8 *)pixels + y * surf->pitch + x) = (Uint8)color;
break;
case 2:
*((Uint16 *)(pixels + y * surf->pitch) + x) = (Uint16)color;
break;
case 3:
byte_buf = (Uint8 *)(pixels + y * surf->pitch) + x * 3;
// Shouldn't this be able to happen without awareness of shifts?
// mapped color -> pixel and all.
#if (SDL_BYTEORDER == SDL_LIL_ENDIAN)
*(byte_buf + (format->Rshift >> 3)) =
(Uint8)(color >> format->Rshift);
*(byte_buf + (format->Gshift >> 3)) =
(Uint8)(color >> format->Gshift);
*(byte_buf + (format->Bshift >> 3)) =
(Uint8)(color >> format->Bshift);
#else
*(byte_buf + 2 - (format->Rshift >> 3)) =
(Uint8)(color >> format->Rshift);
*(byte_buf + 2 - (format->Gshift >> 3)) =
(Uint8)(color >> format->Gshift);
*(byte_buf + 2 - (format->Bshift >> 3)) =
(Uint8)(color >> format->Bshift);
#endif
break;
default: /* case 4: */
*((Uint32 *)(pixels + y * surf->pitch) + x) = color;
break;
}
if (!pgSurface_Unlock((pgSurfaceObject *)self)) {
return NULL;
}
Py_RETURN_NONE;
}
static PyObject *
surf_get_at_mapped(PyObject *self, PyObject *position)
{
SDL_Surface *surf = pgSurface_AsSurface(self);
Uint8 *pixels = NULL;
int x, y;
Sint32 color;
Uint8 *pix;
SURF_INIT_CHECK(surf)
if (!pg_TwoIntsFromObj(position, &x, &y)) {
return RAISE(PyExc_TypeError,
"position must be a sequence of two numbers");
}
if (x < 0 || x >= surf->w || y < 0 || y >= surf->h) {
return RAISE(PyExc_IndexError, "pixel index out of range");
}
int bpp = PG_SURF_BytesPerPixel(surf);
if (bpp < 1 || bpp > 4) {
return RAISE(PyExc_RuntimeError, "invalid color depth for surface");
}
if (!pgSurface_Lock((pgSurfaceObject *)self)) {
return NULL;
}
pixels = (Uint8 *)surf->pixels;
switch (bpp) {
case 1:
color = (Uint32) * ((Uint8 *)pixels + y * surf->pitch + x);
break;
case 2:
color = (Uint32) * ((Uint16 *)(pixels + y * surf->pitch) + x);
break;
case 3:
pix = ((Uint8 *)(pixels + y * surf->pitch) + x * 3);
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
color = (pix[0]) + (pix[1] << 8) + (pix[2] << 16);
#else
color = (pix[2]) + (pix[1] << 8) + (pix[0] << 16);
#endif
break;
default: /* case 4: */
color = *((Uint32 *)(pixels + y * surf->pitch) + x);
break;
}
if (!pgSurface_Unlock((pgSurfaceObject *)self)) {
return NULL;
}
return PyLong_FromLong((long)color);
}
static PyObject *
surf_map_rgb(PyObject *self, PyObject *args)
{
SDL_Surface *surf = pgSurface_AsSurface(self);
Uint8 rgba[4];
int color;
if (!pg_RGBAFromObjEx(args, rgba, PG_COLOR_HANDLE_ALL)) {
return NULL; /* Exception already set for us */
}
SURF_INIT_CHECK(surf)
PG_PixelFormat *format;
SDL_Palette *palette;
if (!PG_GetSurfaceDetails(surf, &format, &palette)) {
return RAISE(pgExc_SDLError, SDL_GetError());
}
color = PG_MapRGBA(format, palette, rgba[0], rgba[1], rgba[2], rgba[3]);
return PyLong_FromLong(color);
}
static PyObject *
surf_unmap_rgb(PyObject *self, PyObject *arg)
{
SDL_Surface *surf = pgSurface_AsSurface(self);
Uint32 col;
Uint8 rgba[4];
col = (Uint32)PyLong_AsLong(arg);
if (col == (Uint32)-1 && PyErr_Occurred()) {
PyErr_Clear();
return RAISE(PyExc_TypeError, "unmap_rgb expects 1 number argument");
}
SURF_INIT_CHECK(surf)
PG_PixelFormat *format;
SDL_Palette *palette;
if (!PG_GetSurfaceDetails(surf, &format, &palette)) {
return RAISE(pgExc_SDLError, SDL_GetError());
}
if (SDL_ISPIXELFORMAT_ALPHA(format->format)) {
PG_GetRGBA(col, format, palette, rgba, rgba + 1, rgba + 2, rgba + 3);
}
else {
PG_GetRGB(col, format, palette, rgba, rgba + 1, rgba + 2);
rgba[3] = 255;
}
return pgColor_New(rgba);
}
static PyObject *
surf_lock(PyObject *self, PyObject *_null)
{
SURF_INIT_CHECK(pgSurface_AsSurface(self))
if (!pgSurface_Lock((pgSurfaceObject *)self)) {
return NULL;
}
Py_RETURN_NONE;