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Code Issues Releases Wiki Activity

remove libpng and use stb_image_write instead

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This commit is contained in:
Takahito Tejima 2015-04-29 17:37:43 -07:00
parent b0188bf217
commit b3da5d3fab
8 changed files with 19 additions and 124 deletions
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8
examples/CMakeLists.txt
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@ -22,14 +22,6 @@
# language governing permissions and limitations under the Apache License.
#
# optional dependency - enables screenshots in some examples
find_package(PNG)
if (PNG_FOUND)
include_directories("${PNG_INCLUDE_DIRS}")
list(APPEND PLATFORM_LIBRARIES "${PNG_LIBRARIES}")
add_definitions(-DOPENSUBDIV_HAS_PNG)
endif()
add_subdirectory(common)
if (NOT NO_OPENGL)

1
examples/common/CMakeLists.txt
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@ -42,6 +42,7 @@ set(EXAMPLES_COMMON_HEADER_FILES
objAnim.h
patchColors.h
simple_math.h
stb_image_write.h
stopwatch.h
)

55
examples/common/gl_framebuffer.cpp
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@ -30,11 +30,12 @@
#include <cassert>
#include <iostream>
#ifdef OPENSUBDIV_HAS_PNG
#include <zlib.h>
#include <png.h>
#endif
#define STB_IMAGE_WRITE_IMPLEMENTATION 1
#include "stb_image_write.h"
#if _MSC_VER
#define snprintf _snprintf
#endif
GLFrameBuffer::GLFrameBuffer() :
_width(0), _height(0),
@ -303,12 +304,10 @@ private:
void
GLFrameBuffer::Screenshot() const {
#ifdef OPENSUBDIV_HAS_PNG
int width = GetWidth(),
height = GetHeight();
void * buf = malloc(GetWidth() * GetHeight() * 4 /*RGBA*/);
std::vector<unsigned char> data(width*height*4 /*RGBA*/);
PixelStoreState pixelStore;
@ -326,7 +325,7 @@ GLFrameBuffer::Screenshot() const {
glActiveTexture( GL_TEXTURE0 );
glBindTexture( GL_TEXTURE_2D, _frameBufferColor );
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, buf);
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, &data[0]);
glActiveTexture( restoreActiveTexture );
glBindTexture( GL_TEXTURE_2D, restoreBinding );
@ -339,44 +338,10 @@ GLFrameBuffer::Screenshot() const {
char fname[64];
snprintf(fname, 64, "screenshot.%d.png", counter++);
if (FILE * f = fopen( fname, "w" )) {
// flip vertical
stbi_write_png(fname, width, height, 4, &data[width*4*(height-1)], -width*4);
png_structp png_ptr =
png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
assert(png_ptr);
png_infop info_ptr =
png_create_info_struct(png_ptr);
assert(info_ptr);
png_set_IHDR(png_ptr, info_ptr, width, height, 8,
PNG_COLOR_TYPE_RGB_ALPHA,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT );
png_set_compression_level(png_ptr, Z_BEST_COMPRESSION);
png_bytep rows_ptr[ height ];
for(int i = 0; i<height; ++i ) {
rows_ptr[height-i-1] = ((png_byte *)buf) + i*width*4;
}
png_set_rows(png_ptr, info_ptr, rows_ptr);
png_init_io(png_ptr, f);
png_write_png( png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, 0 );
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(f);
fprintf(stdout, "Saved %s\n", fname);
} else {
fprintf(stderr, "Error creating: %s\n", fname);
}
free(buf);
#endif
fprintf(stdout, "Saved %s\n", fname);
}

0
examples/glImaging/stb_image_write.h → examples/common/stb_image_write.h
View File

11
examples/glImaging/CMakeLists.txt
View File

@ -58,17 +58,6 @@ _stringify("${SHADER_FILES}" INC_FILES)
include_directories("${CMAKE_CURRENT_BINARY_DIR}")
# optional dependency - enables screenshots
# XXX: this is actually unnecessary for this test since glImaging
# use stb_image_write, however, examples_common_obj has libpng
# dependency so we need to add here. We'll remove the libpng dependency soon.
find_package(PNG)
if (PNG_FOUND)
include_directories("${PNG_INCLUDE_DIRS}")
list(APPEND PLATFORM_LIBRARIES "${PNG_LIBRARIES}")
add_definitions(-DOPENSUBDIV_HAS_PNG)
endif()
_add_glfw_executable(glImaging
"${SOURCE_FILES}"
"${SHADER_FILES}"

4
examples/glImaging/glImaging.cpp
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@ -103,11 +103,9 @@
#include <common/vtr_utils.h>
#include "../common/patchColors.h"
#include "../common/stb_image_write.h" // common.obj has an implementation.
#include "init_shapes.h"
#define STB_IMAGE_WRITE_IMPLEMENTATION 1
#include "stb_image_write.h"
using namespace OpenSubdiv;
static const char *shaderSource =

8
examples/glPtexViewer/CMakeLists.txt
View File

@ -58,14 +58,6 @@ if( OPENCL_FOUND )
include_directories("${OPENCL_INCLUDE_DIRS}")
endif()
# optional dependency - enables screenshots
find_package(PNG)
if (PNG_FOUND)
include_directories("${PNG_INCLUDE_DIRS}")
list(APPEND PLATFORM_LIBRARIES "${PNG_LIBRARIES}")
add_definitions(-DOPENSUBDIV_HAS_PNG)
endif()
#-------------------------------------------------------------------------------
_stringify("${SHADER_FILES}" INC_FILES)

56
examples/glPtexViewer/glPtexViewer.cpp
View File

@ -50,11 +50,6 @@ GLFWmonitor* g_primary = 0;
#include <utility>
#include <algorithm>
#ifdef OPENSUBDIV_HAS_PNG
#include <zlib.h>
#include <png.h>
#endif
#include <osd/glDrawContext.h>
#include <osd/glDrawRegistry.h>
#include <osd/glPtexMipmapTexture.h>
@ -124,6 +119,7 @@ OpenSubdiv::Osd::GLMeshInterface *g_mesh;
#include "../common/gl_hud.h"
#include "../common/patchColors.h"
#include "../common/hdr_reader.h"
#include "../common/stb_image_write.h"
static const char *g_defaultShaderSource =
#if defined(GL_ARB_tessellation_shader) || defined(GL_VERSION_4_0)
@ -1887,20 +1883,16 @@ display() {
//------------------------------------------------------------------------------
void
screenshot(int multiplier=4) {
#ifdef OPENSUBDIV_HAS_PNG
int oldwidth = g_width,
oldheight = g_height,
width = multiplier * g_width,
height = multiplier * g_height;
reshape(g_window, width, height);
display();
void * buf = malloc(width * height * 4);
glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
std::vector<unsigned char> data(width*height*4 /*RGBA*/);
glPixelStorei(GL_PACK_ROW_LENGTH, 0);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
@ -1914,11 +1906,10 @@ screenshot(int multiplier=4) {
glActiveTexture( GL_TEXTURE0 );
glBindTexture( GL_TEXTURE_2D, g_imageShader.frameBufferTexture );
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, buf);
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, &data[0]);
glActiveTexture( restoreActiveTexture );
glBindTexture( GL_TEXTURE_2D, restoreBinding );
glPopClientAttrib();
reshape(g_window, oldwidth, oldheight);
@ -1928,43 +1919,10 @@ screenshot(int multiplier=4) {
char fname[64];
snprintf(fname, 64, "screenshot.%d.png", counter++);
if (FILE * f = fopen( fname, "w" )) {
// flip vertical
stbi_write_png(fname, width, height, 4, &data[width*4*(height-1)], -width*4);
png_structp png_ptr =
png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
assert(png_ptr);
png_infop info_ptr =
png_create_info_struct(png_ptr);
assert(info_ptr);
png_set_IHDR(png_ptr, info_ptr, width, height, 8,
PNG_COLOR_TYPE_RGB_ALPHA,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT );
png_set_compression_level(png_ptr, Z_BEST_COMPRESSION);
png_bytep rows_ptr[ height ];
for(int i = 0; i<height; ++i ) {
rows_ptr[height-i-1] = ((png_byte *)buf) + i*width*4;
}
png_set_rows(png_ptr, info_ptr, rows_ptr);
png_init_io(png_ptr, f);
png_write_png( png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, 0 );
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(f);
fprintf(stdout, "Saved %s\n", fname);
} else {
fprintf(stderr, "Error creating: %s\n", fname);
}
#endif
fprintf(stdout, "Saved %s\n", fname);
}
//------------------------------------------------------------------------------