GCC Code Coverage Report

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2000-2022 Inria
3			* All rights reserved.
4			*
5			* Redistribution and use in source and binary forms, with or without
6			* modification, are permitted provided that the following conditions are met:
7			*
8			* * Redistributions of source code must retain the above copyright notice,
9			* this list of conditions and the following disclaimer.
10			* * Redistributions in binary form must reproduce the above copyright notice,
11			* this list of conditions and the following disclaimer in the documentation
12			* and/or other materials provided with the distribution.
13			* * Neither the name of the ALICE Project-Team nor the names of its
14			* contributors may be used to endorse or promote products derived from this
15			* software without specific prior written permission.
16			*
17			* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18			* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20			* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
21			* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22			* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23			* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24			* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25			* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27			* POSSIBILITY OF SUCH DAMAGE.
28			*
29			* Contact: Bruno Levy
30			*
31			* https://www.inria.fr/fr/bruno-levy
32			*
33			* Inria,
34			* Domaine de Voluceau,
35			* 78150 Le Chesnay - Rocquencourt
36			* FRANCE
37			*
38			*/
39
40			#include <geogram_gfx/basic/GL.h>
41			#include <geogram_gfx/basic/GLSL.h>
42			#include <geogram_gfx/GLUP/GLUP.h>
43			#include <geogram_gfx/GLUP/GLUP_context.h>
44			#include <geogram/basic/logger.h>
45			#include <geogram/basic/command_line.h>
46
47			namespace {
48			using namespace GEO;
49
50			/**
51			* \brief Converts a mat4 into a matrix for OpenGL.
52			* \param[in] m a const reference to the matrix
53			* \return a const pointer to the converted matrix,
54			* stored as a static array of 16 doubles.
55			* \note The matrix is transposed before being sent to OpenGL
56			* because Geogram uses the convention with column
57			* vectors and OpenGL the convention with row vectors
58			* to represent the transformed points.
59			*/
60		✗	const GLdouble* convert_matrix(
61			const mat4& m
62			) {
63			static double result[16] ;
64		✗	index_t k = 0 ;
65		✗	for(index_t i=0; i<4; i++) {
66		✗	for(index_t j=0; j<4; j++) {
67		✗	result[k] = m(i,j) ;
68		✗	k++ ;
69			}
70			}
71		✗	return result ;
72			}
73
74			GLuint quad_VAO = 0;
75			GLuint quad_vertices_VBO = 0;
76			GLuint quad_tex_coords_VBO = 0;
77			GLuint quad_program = 0;
78			GLuint quad_program_BW = 0;
79			GLuint quad_program_DEPTH = 0;
80
81			/**
82			* \brief Creates the VAO, VBOs and program used to draw
83			* a single textured quad.
84			* \details We often have to do that, for instance for blitting
85			* a FrameBufferObject onto the screen (or onto another FrameBufferObject)
86			*/
87		✗	void create_quad_VAO_and_program() {
88			// All that stuff just to draw a single textured square,
89			// the new OpenGL is really painful !!!
90			// (one could use glBegin()/glVertex()/glEnd() instead, but
91			// this would not work with pure Core OpenGL profile and
92			// neither with OpenGL ES !!
93
94
95			// Will be drawn with a triangle strip (supported in both
96			// OpenGL and OpenGL ES)
97
98			static GLfloat coords[4][2] = {
99			{-1.0f, -1.0f},
100			{ 1.0f, -1.0f},
101			{-1.0f, 1.0f},
102			{ 1.0f, 1.0f}
103			};
104
105			static GLfloat tex_coords[4][2] = {
106			{ 0.0f, 0.0f},
107			{ 1.0f, 0.0f},
108			{ 0.0f, 1.0f},
109			{ 1.0f, 1.0f}
110			};
111
112		✗	update_buffer_object(
113			quad_vertices_VBO, GL_ARRAY_BUFFER,
114			sizeof(GL_FLOAT)*2*4, coords
115			);
116		✗	update_buffer_object(
117			quad_tex_coords_VBO, GL_ARRAY_BUFFER,
118			sizeof(GL_FLOAT)*2*4, tex_coords
119			);
120		✗	glupGenVertexArrays(1, &quad_VAO);
121		✗	glupBindVertexArray(quad_VAO);
122
123		✗	glBindBuffer(GL_ARRAY_BUFFER, quad_vertices_VBO);
124		✗	glEnableVertexAttribArray(0);
125		✗	glVertexAttribPointer(
126			0, // Attribute 0
127			2, // nb coordinates per vertex
128			GL_FLOAT, // input coordinates representation
129			GL_FALSE, // do not normalize
130			0, // offset between two consecutive vertices (0 = packed)
131			nullptr // addr. relative to bound VBO
132			);
133
134		✗	glBindBuffer(GL_ARRAY_BUFFER, quad_tex_coords_VBO);
135		✗	glEnableVertexAttribArray(1);
136		✗	glVertexAttribPointer(
137			1, // Attribute 1
138			2, // nb coordinates per vertex
139			GL_FLOAT, // input coordinates representation
140			GL_FALSE, // do not normalize
141			0, // offset between two consecutive vertices (0 = packed)
142			nullptr // addr. relative to bound VBO
143			);
144
145		✗	glupBindVertexArray(0);
146		✗	glBindBuffer(GL_ARRAY_BUFFER, 0);
147
148			#if defined(GEO_OS_EMSCRIPTEN) || defined(GEO_OS_ANDROID)
149			#define NO_DEPTH_SHADER
150
151			static const char* vshader_source =
152			"#version 100 \n"
153			"attribute vec2 vertex_in; \n"
154			"attribute vec2 tex_coord_in; \n"
155			"varying vec2 tex_coord; \n"
156			"void main() { \n"
157			" tex_coord = tex_coord_in; \n"
158			" gl_Position = vec4(vertex_in, 0.0, 1.0); \n"
159			"} \n"
160			;
161
162			static const char* fshader_source =
163			"#version 100 \n"
164			"precision mediump float; \n"
165			"varying vec2 tex_coord; \n"
166			"uniform sampler2D tex; \n"
167			"void main() { \n"
168			" gl_FragColor = texture2D( \n"
169			" tex, tex_coord \n"
170			" ); \n"
171			"} \n"
172			;
173
174			static const char* fshader_BW_source =
175			"#version 100 \n"
176			"precision mediump float; \n"
177			"varying vec2 tex_coord; \n"
178			"uniform sampler2D tex; \n"
179			"void main() { \n"
180			" gl_FragColor = vec4(texture2D( \n"
181			" tex, tex_coord \n"
182			" ).xxx,1.0); \n"
183			"} \n"
184			;
185
186			#else
187
188			static const char* vshader_source =
189			# ifdef GEO_OS_APPLE
190			"#version 330 \n"
191			# else
192			"#version 130 \n"
193			# endif
194			"in vec2 vertex_in; \n"
195			"in vec2 tex_coord_in; \n"
196			"out vec2 tex_coord; \n"
197			"void main() { \n"
198			" tex_coord = tex_coord_in; \n"
199			" gl_Position = vec4(vertex_in, 0.0, 1.0); \n"
200			"} \n"
201			;
202
203			static const char* fshader_source =
204			# ifdef GEO_OS_APPLE
205			"#version 330 \n"
206			# else
207			"#version 130 \n"
208			# endif
209			"out vec4 frag_color ; \n"
210			"in vec2 tex_coord; \n"
211			"uniform sampler2D tex; \n"
212			"void main() { \n"
213			" frag_color = texture( \n"
214			" tex, tex_coord \n"
215			" ); \n"
216			"} \n"
217			;
218
219			static const char* fshader_BW_source =
220			# ifdef GEO_OS_APPLE
221			"#version 330 \n"
222			# else
223			"#version 130 \n"
224			# endif
225			"out vec4 frag_color ; \n"
226			"in vec2 tex_coord; \n"
227			"uniform sampler2D tex; \n"
228			"void main() { \n"
229			" frag_color = vec4(texture( \n"
230			" tex, tex_coord \n"
231			" ).xxx,1.0); \n"
232			"} \n"
233			;
234
235			// NOTE: does not seem to work !
236			static const char* fshader_DEPTH_source =
237			# ifdef GEO_OS_APPLE
238			"#version 330 \n"
239			# else
240			"#version 130 \n"
241			# endif
242			"in vec2 tex_coord; \n"
243			"uniform sampler2D tex; \n"
244			"void main() { \n"
245			" float z = texture(tex,tex_coord).r; \n"
246			" gl_FragDepth = \n"
247			" (1.0-z)*gl_DepthRange.near + z*gl_DepthRange.far; \n"
248			"} \n"
249			;
250			#endif
251
252		✗	GLuint vshader = GLSL::compile_shader(
253			GL_VERTEX_SHADER, vshader_source, nullptr
254			);
255
256		✗	GLuint fshader = GLSL::compile_shader(
257			GL_FRAGMENT_SHADER, fshader_source, nullptr
258			);
259
260		✗	GLuint fshader_BW = GLSL::compile_shader(
261			GL_FRAGMENT_SHADER, fshader_BW_source, nullptr
262			);
263
264			#ifndef NO_DEPTH_SHADER
265		✗	GLuint fshader_DEPTH = GLSL::compile_shader(
266			GL_FRAGMENT_SHADER, fshader_DEPTH_source, nullptr
267			);
268			#endif
269
270		✗	quad_program = GLSL::create_program_from_shaders_no_link(
271			vshader, fshader, nullptr
272			);
273
274		✗	quad_program_BW = GLSL::create_program_from_shaders_no_link(
275			vshader, fshader_BW, nullptr
276			);
277
278			#ifndef NO_DEPTH_SHADER
279		✗	quad_program_DEPTH = GLSL::create_program_from_shaders_no_link(
280			vshader, fshader_DEPTH, nullptr
281			);
282			#endif
283
284		✗	glBindAttribLocation(quad_program, 0, "vertex_in");
285		✗	glBindAttribLocation(quad_program, 1, "tex_coord_in");
286		✗	GLSL::link_program(quad_program);
287
288
289		✗	glBindAttribLocation(quad_program_BW, 0, "vertex_in");
290		✗	glBindAttribLocation(quad_program_BW, 1, "tex_coord_in");
291		✗	GLSL::link_program(quad_program_BW);
292		✗	GLSL::set_program_uniform_by_name(quad_program_BW, "tex", 0);
293
294			#ifndef NO_DEPTH_SHADER
295		✗	glBindAttribLocation(quad_program_DEPTH, 0, "vertex_in");
296		✗	glBindAttribLocation(quad_program_DEPTH, 1, "tex_coord_in");
297		✗	GLSL::link_program(quad_program_DEPTH);
298		✗	GLSL::set_program_uniform_by_name(quad_program_DEPTH, "tex", 0);
299			#endif
300		✗	glDeleteShader(vshader);
301		✗	glDeleteShader(fshader);
302		✗	glDeleteShader(fshader_BW);
303
304			#ifndef NO_DEPTH_SHADER
305		✗	glDeleteShader(fshader_DEPTH);
306			#endif
307		✗	}
308
309		✗	const char* error_string(GLenum error_code) {
310		✗	const char* result = nullptr;
311		✗	switch(error_code) {
312		✗	case GL_NO_ERROR:
313		✗	result = "no error";
314		✗	break;
315		✗	case GL_INVALID_ENUM:
316		✗	result = "invalid enum";
317		✗	break;
318		✗	case GL_INVALID_VALUE:
319		✗	result = "invalid value";
320		✗	break;
321		✗	case GL_INVALID_OPERATION:
322		✗	result = "invalid operation";
323		✗	break;
324		✗	case GL_INVALID_FRAMEBUFFER_OPERATION:
325		✗	result = "invalid framebuffer operation";
326		✗	break;
327		✗	case GL_OUT_OF_MEMORY:
328		✗	result = "out of memory";
329		✗	break;
330			/*
331			case GL_STACK_UNDERFLOW:
332			result = "stack underflow";
333			break;
334			case GL_STACK_OVERFLOW:
335			result = "stack over";
336			break;
337			*/
338		✗	default:
339		✗	result = "unknown errorcode";
340			}
341		✗	return result;
342			}
343			}
344
345			namespace GEO {
346
347			namespace GL {
348
349		✗	void initialize() {
350		✗	}
351
352		✗	void terminate() {
353		✗	if(quad_program != 0) {
354		✗	glDeleteProgram(quad_program);
355		✗	quad_program = 0;
356			}
357		✗	if(quad_program_BW != 0) {
358		✗	glDeleteProgram(quad_program_BW);
359		✗	quad_program_BW = 0;
360			}
361		✗	if(quad_program_DEPTH != 0) {
362		✗	glDeleteProgram(quad_program_DEPTH);
363		✗	quad_program_DEPTH = 0;
364			}
365		✗	if(quad_VAO != 0) {
366		✗	glupDeleteVertexArrays(1, &quad_VAO);
367		✗	quad_VAO = 0;
368			}
369		✗	if(quad_vertices_VBO != 0) {
370		✗	glDeleteBuffers(1, &quad_vertices_VBO);
371		✗	quad_vertices_VBO = 0;
372			}
373		✗	if(quad_tex_coords_VBO != 0) {
374		✗	glDeleteBuffers(1, &quad_tex_coords_VBO);
375		✗	quad_tex_coords_VBO = 0;
376			}
377		✗	}
378			}
379
380		✗	void glupMapTexCoords1d(double minval, double maxval, index_t mult) {
381		✗	glupMatrixMode(GLUP_TEXTURE_MATRIX);
382			GLUPdouble M[16];
383		✗	Memory::clear(M, sizeof(GLUPdouble)*16);
384		✗	double d = maxval - minval;
385		✗	if(::fabs(d) < 1e-10) {
386		✗	d = 0.0;
387			} else {
388		✗	d = 1.0 / d;
389			}
390		✗	d *= double(std::max(mult, 1u));
391		✗	M[0] = d;
392		✗	M[12] = -d*minval;
393		✗	M[15] = 1.0;
394		✗	glupLoadMatrixd(M);
395		✗	glupMatrixMode(GLUP_MODELVIEW_MATRIX);
396		✗	}
397
398		✗	void glupLoadMatrix(const mat4& m) {
399		✗	glupLoadMatrixd(convert_matrix(m));
400		✗	}
401
402		✗	void glupMultMatrix(const mat4& m) {
403		✗	glupMultMatrixd(convert_matrix(m));
404		✗	}
405
406
407		✗	GLint64 get_size_of_bound_buffer_object(GLenum target) {
408
409			#ifdef GLUP_DEBUG
410			{
411			GLint buffer = 0;
412			switch(target) {
413			case GL_ARRAY_BUFFER:
414			glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &buffer);
415			break;
416			case GL_ELEMENT_ARRAY_BUFFER:
417			glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &buffer);
418			break;
419			default:
420			geo_assert_not_reached;
421			break;
422			}
423			geo_assert(buffer != 0);
424			}
425			#endif
426
427		✗	GLint64 result=0;
428
429			#ifdef GEO_GL_440
430
431			static bool init = false;
432			static bool use_glGetBufferParameteri64v = false;
433
434			// Note: there is a version of glGetBufferParameteriv that uses
435			// 64 bit parameters. Since array data larger than 4Gb will be
436			// common place, it is this version that should be used. However,
437			// it is not supported by the Intel driver (therefore we fallback
438			// to the standard 32 bits version if such a driver is detected).
439			// It is not implemented by Gallium either... Oh well, for now
440			// I deactivate it if the driver is not NVIDIA.
441
442		✗	if(!init) {
443		✗	init = true;
444		✗	const char* vendor = (const char*)glGetString(GL_VENDOR);
445		✗	use_glGetBufferParameteri64v = (
446		✗	strlen(vendor) >= 6 && !strncmp(vendor, "NVIDIA", 6) &&
447		✗	(glGetBufferParameteri64v != nullptr)
448			);
449			// Does not seem to be implemented under OpenGL ES
450		✗	if(CmdLine::get_arg("gfx:GL_profile") == "ES") {
451		✗	use_glGetBufferParameteri64v = false;
452			}
453			}
454		✗	if(use_glGetBufferParameteri64v) {
455		✗	glGetBufferParameteri64v(target,GL_BUFFER_SIZE,&result);
456			} else
457			#endif
458			{
459		✗	GLint result32=0;
460		✗	glGetBufferParameteriv(target,GL_BUFFER_SIZE,&result32);
461		✗	result = GLint64(result32);
462			}
463		✗	return result;
464			}
465
466
467		✗	void update_buffer_object(
468			GLuint& buffer_id, GLenum target, size_t new_size, const void* data
469			) {
470		✗	if(new_size == 0) {
471		✗	if(buffer_id != 0) {
472		✗	glDeleteBuffers(1, &buffer_id);
473		✗	buffer_id = 0;
474			}
475		✗	return;
476			}
477
478		✗	GLint64 size = 0;
479		✗	if(buffer_id == 0) {
480		✗	glGenBuffers(1, &buffer_id);
481		✗	glBindBuffer(target, buffer_id);
482			} else {
483		✗	glBindBuffer(target, buffer_id);
484		✗	size = get_size_of_bound_buffer_object(target);
485			}
486
487		✗	if(new_size == size_t(size)) {
488		✗	glBufferSubData(target, 0, GLsizeiptr(size), data);
489			} else {
490		✗	glBufferData(
491			target, GLsizeiptr(new_size), data, GL_STATIC_DRAW
492			);
493			}
494			}
495
496		✗	void stream_buffer_object(
497			GLuint& buffer_id, GLenum target, size_t new_size, const void* data
498			) {
499		✗	if(new_size == 0) {
500		✗	if(buffer_id != 0) {
501		✗	glDeleteBuffers(1, &buffer_id);
502		✗	buffer_id = 0;
503			}
504		✗	return;
505			}
506
507		✗	GLint64 size = 0;
508		✗	if(buffer_id == 0) {
509		✗	glGenBuffers(1, &buffer_id);
510		✗	glBindBuffer(target, buffer_id);
511			} else {
512		✗	glBindBuffer(target, buffer_id);
513		✗	size = get_size_of_bound_buffer_object(target);
514			}
515
516		✗	if(new_size == size_t(size)) {
517			// Binding nullptr makes the GPU-side allocated buffer "orphan",
518			// if there was a rendering operation currently using it, then
519			// it can safely continue.
520		✗	glBufferData(target, GLsizeiptr(size), nullptr, GL_STREAM_DRAW);
521			// And here we bind a fresh new block of GPU-side memory.
522			// See https://www.opengl.org/wiki/Buffer_Object_Streaming
523		✗	glBufferData(target, GLsizeiptr(size), data, GL_STREAM_DRAW);
524			} else {
525		✗	glBufferData(
526			target, GLsizeiptr(new_size), data, GL_STATIC_DRAW
527			);
528			}
529			}
530
531
532		✗	void update_or_check_buffer_object(
533			GLuint& buffer_id, GLenum target, size_t new_size, const void* data,
534			bool update
535			) {
536		✗	if(update) {
537		✗	update_buffer_object(buffer_id, target, new_size, data);
538			} else {
539		✗	glBindBuffer(target, buffer_id);
540		✗	if(new_size != size_t(get_size_of_bound_buffer_object(target))) {
541		✗	Logger::warn("OpenGL")
542		✗	<< "Buffer Object does not have the expected size."
543		✗	<< std::endl;
544		✗	Logger::warn("OpenGL")
545			<< "An object was probably changed "
546		✗	<< "without notifying/updating the graphics."
547		✗	<< std::endl;
548		✗	Logger::warn("OpenGL")
549		✗	<< "Forcing Buffer Object update."
550		✗	<< std::endl;
551		✗	update_buffer_object(buffer_id, target, new_size, data);
552			}
553			}
554		✗	}
555
556		✗	void check_gl(const char* file, int line, bool warning_only) {
557
558		✗	GLenum error_code = glGetError() ;
559		✗	bool has_opengl_errors = false ;
560		✗	while(error_code != GL_NO_ERROR) {
561		✗	has_opengl_errors = true ;
562		✗	if(warning_only) {
563		✗	Logger::warn("OpenGL")
564		✗	<< file << ":" << line << " "
565			<< error_string(error_code)
566		✗	<< " (ignored)"
567		✗	<< std::endl;
568			} else {
569		✗	Logger::err("OpenGL")
570		✗	<< file << ":" << line << " "
571		✗	<< error_string(error_code)
572		✗	<< std::endl;
573			}
574		✗	error_code = glGetError() ;
575			}
576		✗	geo_argused(has_opengl_errors);
577		✗	}
578
579		✗	void clear_gl_error_flags(const char* file, int line) {
580			#ifdef GEO_DEBUG
581		✗	check_gl(file,line,true);
582			#else
583			geo_argused(file);
584			geo_argused(line);
585			while(glGetError() != GL_NO_ERROR);
586			#endif
587		✗	}
588
589		✗	void draw_unit_textured_quad(TexturedQuadMode mode) {
590		✗	if(quad_VAO == 0) {
591		✗	create_quad_VAO_and_program();
592			}
593		✗	GLint current_program = 0;
594		✗	glGetIntegerv(GL_CURRENT_PROGRAM, &current_program);
595		✗	if(current_program == 0) {
596		✗	switch(mode) {
597		✗	case TEX_QUAD_RGBA:
598		✗	glUseProgram(quad_program);
599		✗	break;
600		✗	case TEX_QUAD_RRR1:
601		✗	glUseProgram(quad_program_BW);
602		✗	break;
603		✗	case TEX_QUAD_DEPTH:
604		✗	glUseProgram(quad_program_DEPTH);
605		✗	break;
606			}
607			}
608		✗	glupBindVertexArray(quad_VAO);
609		✗	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
610		✗	glupBindVertexArray(0);
611		✗	if(current_program == 0) {
612		✗	glUseProgram(0);
613			}
614		✗	}
615
616			/****************************************************************/
617
618
619		✗	static int htoi(char digit) {
620		✗	if(digit >= '0' && digit <= '9') {
621		✗	return digit - '0';
622			}
623		✗	if(digit >= 'a' && digit <= 'f') {
624		✗	return digit - 'a' + 10;
625			}
626		✗	if(digit >= 'A' && digit <= 'F') {
627		✗	return digit - 'A' + 10;
628			}
629		✗	fprintf(stderr, "xpm: unknown digit\n");
630		✗	return 0;
631			}
632
633			/* The colormap. */
634			static unsigned char i2r[1024];
635			static unsigned char i2g[1024];
636			static unsigned char i2b[1024];
637			static unsigned char i2a[1024];
638
639			/*
640			* Converts a two-digit XPM color code into
641			* a color index.
642			*/
643			static int char_to_index[256][256];
644
645		✗	void glTexImage2Dxpm(char const* const* xpm_data) {
646			int width, height, nb_colors, chars_per_pixel;
647		✗	int line = 0;
648		✗	int color = 0;
649		✗	int key1 = 0, key2 = 0;
650			const char* colorcode;
651			int x, y;
652			unsigned char* rgba;
653			unsigned char* pixel;
654
655		✗	sscanf(
656		✗	xpm_data[line], "%6d%6d%6d%6d",
657			&width, &height, &nb_colors, &chars_per_pixel
658			);
659		✗	line++;
660		✗	if(nb_colors > 1024) {
661		✗	fprintf(stderr, "xpm with more than 1024 colors\n");
662		✗	return;
663			}
664		✗	if(chars_per_pixel != 1 && chars_per_pixel != 2) {
665		✗	fprintf(stderr, "xpm with more than 2 chars per pixel\n");
666		✗	return;
667			}
668		✗	for(color = 0; color < nb_colors; color++) {
669			int r, g, b;
670			int none ;
671
672		✗	key1 = xpm_data[line][0];
673		✗	key2 = (chars_per_pixel == 2) ? xpm_data[line][1] : 0;
674		✗	colorcode = strstr(xpm_data[line], "c #");
675		✗	none = 0;
676		✗	if(colorcode == nullptr) {
677		✗	colorcode = "c #000000";
678		✗	if(strstr(xpm_data[line], "None") != nullptr) {
679		✗	none = 1;
680			} else {
681		✗	fprintf(
682			stderr, "unknown xpm color entry (replaced with black)\n"
683			);
684			}
685			}
686		✗	colorcode += 3;
687
688		✗	if(strlen(colorcode) == 12) {
689		✗	r = 16 * htoi(colorcode[0]) + htoi(colorcode[1]);
690		✗	g = 16 * htoi(colorcode[4]) + htoi(colorcode[5]);
691		✗	b = 16 * htoi(colorcode[8]) + htoi(colorcode[9]);
692			} else {
693		✗	r = 16 * htoi(colorcode[0]) + htoi(colorcode[1]);
694		✗	g = 16 * htoi(colorcode[2]) + htoi(colorcode[3]);
695		✗	b = 16 * htoi(colorcode[4]) + htoi(colorcode[5]);
696			}
697
698		✗	i2r[color] = (unsigned char) r;
699		✗	i2g[color] = (unsigned char) g;
700		✗	i2b[color] = (unsigned char) b;
701		✗	if(none) {
702		✗	i2a[color] = 0;
703			} else {
704		✗	i2a[color] = 255;
705			}
706		✗	char_to_index[key1][key2] = color;
707		✗	line++;
708			}
709		✗	rgba = (unsigned char*) malloc((size_t) (width * height * 4));
710		✗	pixel = rgba;
711		✗	for(y = 0; y < height; y++) {
712		✗	for(x = 0; x < width; x++) {
713		✗	if(chars_per_pixel == 2) {
714		✗	key1 = xpm_data[line][2 * x];
715		✗	key2 = xpm_data[line][2 * x + 1];
716			} else {
717		✗	key1 = xpm_data[line][x];
718		✗	key2 = 0;
719			}
720		✗	color = char_to_index[key1][key2];
721		✗	pixel[0] = i2r[color];
722		✗	pixel[1] = i2g[color];
723		✗	pixel[2] = i2b[color];
724		✗	pixel[3] = i2a[color];
725		✗	pixel += 4;
726			}
727		✗	line++;
728			}
729
730		✗	glTexImage2D(
731			GL_TEXTURE_2D, 0,
732			GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, rgba
733			);
734			#ifndef __EMSCRIPTEN__
735		✗	glGenerateMipmap(GL_TEXTURE_2D);
736			#endif
737		✗	free(rgba);
738			}
739
740
741			}
742