diff options
Diffstat (limited to 'src/texture')
| -rw-r--r-- | src/texture/texture.c | 268 | ||||
| -rw-r--r-- | src/texture/texture.h | 121 |
2 files changed, 0 insertions, 389 deletions
diff --git a/src/texture/texture.c b/src/texture/texture.c deleted file mode 100644 index 37e38e9..0000000 --- a/src/texture/texture.c +++ /dev/null @@ -1,268 +0,0 @@ -#include "texture.h" - -static int honey_lua_texture_new(lua_State* L) -{ - honey_texture* texture = lua_newuserdata(L, sizeof(honey_texture)); - return 1; -} - -static int honey_lua_texture_create(lua_State* L) -{ - honey_texture* texture; - int width, height; - char* type; - honey_lua_parse_arguments(L, 4, - HONEY_USERDATA, &texture, - HONEY_STRING, &type, - HONEY_INTEGER, &width, - HONEY_INTEGER, &height); - - if (strcmp(type, "greyscale") == 0) - honey_texture_new_greyscale(texture, width, height, NULL); - else if (strcmp(type, "rgb") == 0) - honey_texture_new_rgb(texture, width, height, NULL); - else if (strcmp(type, "rgba") == 0) - honey_texture_new_rgba(texture, width, height, NULL); - else if (strcmp(type, "depth") == 0) - honey_texture_new_depth(texture, width, height, NULL); - else { - char* error; - honey_format_string(&error, - "unknown texture type '%s'", - type); - lua_pushstring(L, error); - free(error); - lua_error(L); - } - return 0; -} - -static int honey_lua_texture_load(lua_State* L) -{ - honey_texture* texture; - char* texture_path; - honey_lua_parse_arguments(L, 3, - HONEY_USERDATA, &texture, - HONEY_STRING, &texture_path); - enum honey_texture_result result = honey_texture_load(texture, texture_path); - if (result != TEXTURE_OK) { - char* error; - honey_format_string(&error, - "failed to load '%s'", - texture_path); - lua_pushstring(L, error); - free(error); - lua_error(L); - } - - return 0; -} - -static int honey_lua_texture_use(lua_State* L) -{ - honey_texture* texture; - int texture_unit; - honey_lua_parse_arguments(L, 2, - HONEY_USERDATA, &texture, - HONEY_INTEGER, &texture_unit); - honey_texture_use(*texture, texture_unit); - return 0; -} - -static int honey_lua_framebuffer_new(lua_State* L) -{ - honey_texture* draw, *depth; - if (lua_isuserdata(L, 1)) - draw = lua_touserdata(L, 1); - else - draw = NULL; - - if (lua_isuserdata(L, 2)) - depth = lua_touserdata(L, 2); - else - depth = NULL; - - int width, height; - honey_lua_parse_arguments(L, 4, HONEY_ANY, HONEY_ANY, - HONEY_INTEGER, &width, - HONEY_INTEGER, &height); - - unsigned int framebuffer; - honey_texture_framebuffer_object_new(&framebuffer, - draw, depth, - width, height); - lua_pushinteger(L, framebuffer); - return 1; -} - -void honey_setup_texture(lua_State* L) -{ - honey_lua_element texture_elements[] = { - { "new", HONEY_FUNCTION, { .function = honey_lua_texture_new } }, - { "new_framebuffer", HONEY_FUNCTION, { .function = honey_lua_framebuffer_new } }, - { "create", HONEY_FUNCTION, { .function = honey_lua_texture_create } }, - { "load", HONEY_FUNCTION, { .function = honey_lua_texture_load } }, - { "use", HONEY_FUNCTION, { .function = honey_lua_texture_use } }, - }; - - honey_lua_create_table(L, texture_elements, 5); -} - -/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - -static void generate_texture(honey_texture* texture, - int width, int height, - int format, int type, - void* data) -{ - unsigned int texture_id; - glGenTextures(1, &texture_id); - glBindTexture(GL_TEXTURE_2D, texture_id); - - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - - glTexImage2D(GL_TEXTURE_2D, 0, - format, - width, height, 0, - format, - type, data); - - texture->id = texture_id; - texture->width = width; - texture->height = height; - - switch(format) { - case GL_RED: - texture->type = GREY; - texture->channels = 1; - break; - - case GL_RGB: - texture->type = RGB; - texture->channels = 3; - break; - - case GL_RGBA: - texture->type = RGBA; - texture->channels = 4; - break; - - case GL_DEPTH_COMPONENT: - texture->type = DEPTH; - texture->channels = 1; - break; - - default: - break; - } - - return HONEY_OK; -} - -/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - -void honey_texture_new_greyscale(honey_texture* texture, - int height, int width, - unsigned char* data) -{ - generate_texture(texture, width, height, GL_RED, GL_UNSIGNED_BYTE, data); -} - -/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - -void honey_texture_new_rgb(honey_texture* texture, - int height, int width, - unsigned char* data) -{ - generate_texture(texture, width, height, GL_RGB, GL_UNSIGNED_BYTE, data); -} - -/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - -void honey_texture_new_rgba(honey_texture* texture, - int height, int width, - unsigned char* data) -{ - generate_texture(texture, width, height, GL_RGBA, GL_UNSIGNED_BYTE, data); -} - -/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - -void honey_texture_new_depth(honey_texture* texture, - int height, int width, - float* data) -{ - generate_texture(texture, width, height, GL_DEPTH_COMPONENT, GL_FLOAT, data); -} - -/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - -enum honey_texture_result honey_texture_load(honey_texture* texture, - char* texture_path) -{ - int width, height, channels; - unsigned char* image_data = stbi_load(texture_path, &width, &height, &channels, 0); - if (image_data == NULL) { - return TEXTURE_FAILED; - } - - switch(channels) { - case 1: - honey_texture_new_greyscale(texture, width, height, image_data); - break; - - case 3: - honey_texture_new_rgb(texture, width, height, image_data); - break; - - case 4: - honey_texture_new_rgba(texture, width, height, image_data); - break; - - default: - return TEXTURE_CHANNEL_ERROR; - } - - glGenerateMipmap(GL_TEXTURE_2D); - stbi_image_free(image_data); - - return TEXTURE_OK; -} - -/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - -void honey_texture_use(honey_texture texture, int texture_unit) { - glActiveTexture(GL_TEXTURE0 + texture_unit); - glBindTexture(GL_TEXTURE_2D, texture.id); -} - -/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - -void honey_texture_framebuffer_object_new(unsigned int* destination, - honey_texture* draw, - honey_texture* depth, - int width, int height) -{ - glBindTexture(GL_TEXTURE_2D, 0); - - glGenFramebuffers(1, destination); - glBindFramebuffer(GL_FRAMEBUFFER, *destination); - - if (draw != NULL) - glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, draw->id, 0); - else { - glDrawBuffer(GL_NONE); - glReadBuffer(GL_NONE); - } - - if (depth != NULL) - glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depth->id, 0); - - if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) - printf("framebuffer is not complete!\n"); - - glBindFramebuffer(GL_FRAMEBUFFER, 0); -} diff --git a/src/texture/texture.h b/src/texture/texture.h deleted file mode 100644 index 9dc0308..0000000 --- a/src/texture/texture.h +++ /dev/null @@ -1,121 +0,0 @@ -#ifndef HONEY_TEXTURE_H -#define HONEY_TEXTURE_H - -/** @file texture.h - * - *@brief Defines the honey_texture struct and associated functions. -*/ - -#include "../common.h" - -enum honey_texture_result { - TEXTURE_OK, - TEXTURE_FAILED, - TEXTURE_CHANNEL_ERROR, - N_TEXTURE_RESULTS }; - -typedef struct { - unsigned int id; - enum { - GREY, - RGB, - RGBA, - DEPTH - } type; - int width; - int height; - int channels; -} honey_texture; - -/** @brief Place the honey.texture bindings as a table on the stack. */ -void honey_setup_texture(lua_State* L); - -/** @brief Create a greyscale texture. - * - * @param[out] texture Pointer to the destination texture. - * @param[in] width The width in pixels of the texture to create. - * @param[in] height The height in pixels of the texture to create. - * @param[in] data The data to populate the texture with, or NULL to leave it unpopulated. - * - * @returns Nothing. - */ -void honey_texture_new_greyscale(honey_texture* texture, - int width, int height, - unsigned char* data); - -/** @brief Create an RGB texture. - * - * @param[out] texture Pointer to the destination texture. - * @param[in] width The width in pixels of the texture to create. - * @param[in] height The height in pixels of the texture to create. - * @param[in] data The data to populate the texture with, or NULL to leave it unpopulated. - * - * @returns Nothing. - */ -void honey_texture_new_rgb(honey_texture* texture, - int width, int height, - unsigned char* data); - -/** @brief Create an RGBA texture. - * - * @param[out] texture Pointer to the destination texture. - * @param[in] width The width in pixels of the texture to create. - * @param[in] height The height in pixels of the texture to create. - * @param[in] data The data to populate the texture with, or NULL to leave it unpopulated. - * - * @returns Nothing. - */ -void honey_texture_new_rgba(honey_texture* texture, - int width, int height, - unsigned char* data); - -/** @brief Create a depth texture. - * - * @param[out] texture Pointer to the destination texture. - * @param[in] width The width in pixels of the texture to create. - * @param[in] height The height in pixels of the texture to create. - * @param[in] data The data to populate the texture with, or NULL to leave it unpopulated. - * - * @returns Nothing. - */ -void honey_texture_new_depth(honey_texture* texture, - int width, int height, - float* data); - -/** @brief Load a texture from disk. - * - * @param[out] texture Pointer to the destination texture - * @param[in] texture_path Path to the location of the texture - * @param[in] alpha_channel Set to true if the target image contains an alpha channel - * - * @return Success or failure type - */ -enum honey_texture_result honey_texture_load(honey_texture* texture, - char* texture_path); - -/** @brief Load a texture into a texture unit. - * - * @param[in] texture The texture to use - * @param[in] texture_unit The texture unit to put the texture in - */ -void honey_texture_use(honey_texture texture, int texture_unit); - -/** @brief Create a framebuffer object. - * - * You must specify at least one of draw and depth; otherwise, the framebuffer will - * be incomplete and fail. - * - * @param[out] destination Pointer to store the resulting OpenGL handle in. - * @param[in] draw Pointer to a texture to draw to. - * @param[in] depth Pointer to a depth texture. - * @param[in] width The width in pixels of the FBO. - * @param[in] height The height in pixels of the FBO. - * - * @returns Nothing. - */ -void honey_texture_framebuffer_object_new(unsigned int* destination, - honey_texture* draw, - honey_texture* depth, - int width, int height); - -#endif |